diff --git a/LXST/Codecs/Codec2.py b/LXST/Codecs/Codec2.py
index b371343..ab37ebe 100644
--- a/LXST/Codecs/Codec2.py
+++ b/LXST/Codecs/Codec2.py
@@ -57,7 +57,6 @@ class Codec2(Codec):
         elif frame.shape[1] > self.channels:
             frame = frame[:, 1]
 
-        
         input_samples = frame*self.TYPE_MAP_FACTOR
         input_samples = input_samples.astype(np.int16)
 
@@ -88,7 +87,9 @@ class Codec2(Codec):
     def decode(self, frame_bytes):
         frame_header = frame_bytes[0]
         frame_bytes  = frame_bytes[1:]
-        frame_mode = self.HEADER_MODES[frame_header]
+        
+        if frame_header in self.HEADER_MODES: frame_mode = self.HEADER_MODES[frame_header]
+        else:                                 frame_mode = self.mode
         if self.mode != frame_mode:
             self.set_mode(frame_mode)
 
diff --git a/LXST/Filters.c b/LXST/Filters.c
new file mode 100644
index 0000000..607a8e0
--- /dev/null
+++ b/LXST/Filters.c
@@ -0,0 +1,69 @@
+#include <math.h>
+
+void highpass_filter(float* input, float* output, int samples, int channels, float alpha, float* filter_states, float* last_inputs) {
+  int i, ch;    
+  for (ch = 0; ch < channels; ch++) { float input_diff = input[ch] - last_inputs[ch]; output[ch] = alpha * (filter_states[ch] + input_diff); }
+  for (i = 1; i < samples; i++) { for (ch = 0; ch < channels; ch++) { int idx = i * channels + ch; float input_diff = input[idx] - input[idx - channels]; output[idx] = alpha * (output[idx - channels] + input_diff); } }
+  for (ch = 0; ch < channels; ch++) { int last_idx = (samples - 1) * channels + ch; filter_states[ch] = output[last_idx]; last_inputs[ch] = input[last_idx]; }
+}
+
+void lowpass_filter(float* input, float* output, int samples, int channels, float alpha, float* filter_states) {
+  int i, ch;
+  float one_minus_alpha = 1.0f - alpha;
+  for (ch = 0; ch < channels; ch++) { output[ch] = alpha * input[ch] + one_minus_alpha * filter_states[ch]; }
+    for (i = 1; i < samples; i++) {
+      for (ch = 0; ch < channels; ch++) { int idx = i * channels + ch; output[idx] = alpha * input[idx] + one_minus_alpha * output[idx - channels]; }
+    }
+  for (ch = 0; ch < channels; ch++) { int last_idx = (samples - 1) * channels + ch; filter_states[ch] = output[last_idx]; }
+}
+
+void agc_process(float* input, float* output, int samples, int channels, float target_linear, float max_gain_linear, float trigger_level,
+  float attack_coeff, float release_coeff, float hold_samples, float* current_gain_lin, int* hold_counter, int block_target) {
+
+  for (int i = 0; i < samples * channels; i++) { output[i] = input[i]; }
+  int num_blocks = block_target;
+  int block_size = samples / num_blocks;
+  if (block_size < 1) block_size = 1;
+
+  for (int block = 0; block < num_blocks; block++) {
+    int                            block_start = block*block_size;
+    int                            block_end   = (block + 1)*block_size;
+    if (block == num_blocks - 1) { block_end   = samples; }
+    if (block_end > samples)     { block_end   = samples; }
+
+    int block_samples = block_end - block_start;
+    if (block_samples <= 0) continue;
+
+    for (int ch = 0; ch < channels; ch++) {
+      float sum_squares = 0.0f;
+      for (int i = block_start; i < block_end; i++) { int idx = i * channels + ch; sum_squares += output[idx] * output[idx]; }
+        float rms = sqrtf(sum_squares / block_samples);
+
+      float target_gain;
+      if (rms > 1e-9f && rms > trigger_level) {
+        target_gain = target_linear / rms;
+        if (target_gain > max_gain_linear) { target_gain = max_gain_linear; }
+      } else { target_gain = current_gain_lin[ch]; }
+
+      if (target_gain < current_gain_lin[ch]) {
+        current_gain_lin[ch] = attack_coeff * target_gain + (1.0f - attack_coeff) * current_gain_lin[ch];
+        *hold_counter = (int)hold_samples;
+      } else {
+        if (*hold_counter > 0) { *hold_counter -= block_samples; }
+        else { current_gain_lin[ch] = release_coeff * target_gain + (1.0f - release_coeff) * current_gain_lin[ch]; }
+      }
+
+      for (int i = block_start; i < block_end; i++) { int idx = i * channels + ch; output[idx] *= current_gain_lin[ch]; }
+    }
+  }
+
+  float peak_limit = 0.75f;
+  for (int ch = 0; ch < channels; ch++) {
+    float peak = 0.0f;
+    for (int i = 0; i < samples; i++) { int idx = i * channels + ch; float abs_val = fabsf(output[idx]);
+                                        if (abs_val > peak) { peak = abs_val; } }
+    
+    if (peak > peak_limit) { float scale = peak_limit / peak;
+                             for (int i = 0; i < samples; i++) { int idx = i * channels + ch; output[idx] *= scale; } }
+  }
+}
\ No newline at end of file
diff --git a/LXST/Filters.h b/LXST/Filters.h
new file mode 100644
index 0000000..cefeb6c
--- /dev/null
+++ b/LXST/Filters.h
@@ -0,0 +1,3 @@
+void highpass_filter(float* input, float* output, int samples, int channels, float alpha, float* filter_states, float* last_inputs);
+void lowpass_filter(float* input, float* output, int samples, int channels, float alpha, float* filter_states);
+void agc_process(float* input, float* output, int samples, int channels, float target_linear, float max_gain_linear, float trigger_level, float attack_coeff, float release_coeff, float hold_samples, float* current_gain_lin, int* hold_counter, int block_target);
\ No newline at end of file
diff --git a/LXST/Filters.py b/LXST/Filters.py
new file mode 100644
index 0000000..4414093
--- /dev/null
+++ b/LXST/Filters.py
@@ -0,0 +1,276 @@
+from importlib.util import find_spec
+import numpy as np
+import time
+import RNS
+import os
+
+USE_NATIVE_FILTERS = False
+if not find_spec("cffi"):
+    RNS.log(f"Could not load CFFI module for filter acceleration, falling back to Python filters. This will be slow.", RNS.LOG_WARNING)
+    RNS.log(f"Make sure that the CFFI module is installed and available.", RNS.LOG_WARNING)
+else:
+    try:
+        from cffi import FFI
+        import pathlib
+        c_src_path = pathlib.Path(__file__).parent.resolve()
+        ffi = FFI()
+
+        try:
+            filterlib_spec = find_spec("LXST.filterlib")
+            if not filterlib_spec or filterlib_spec.origin == None: raise ImportError("Could not locate pre-compiled LXST.filterlib module")
+            with open(os.path.join(c_src_path, "Filters.h"), "r") as f: ffi.cdef(f.read())
+            native_functions = ffi.dlopen(filterlib_spec.origin)
+            USE_NATIVE_FILTERS = True
+        
+        except Exception as e:
+            RNS.log(f"Could not load pre-compiled LXST filters library. The contained exception was: {e}", RNS.LOG_WARNING)
+            RNS.log(f"Attempting to compile library from source...", RNS.LOG_WARNING)
+
+        if USE_NATIVE_FILTERS == False:
+            with open(os.path.join(c_src_path, "Filters.h"), "r") as f: ffi.cdef(f.read())
+            with open(os.path.join(c_src_path, "Filters.c"), "r") as f: c_src = f.read()
+            native_functions = ffi.verify(c_src)
+            USE_NATIVE_FILTERS = True
+            RNS.log(f"Successfully compiled and loaded filters library", RNS.LOG_WARNING)
+
+    except Exception as e:
+        RNS.log(f"Could not compile modules for filter acceleration, falling back to Python filters. This will be slow.", RNS.LOG_WARNING)
+        RNS.log(f"The contained exception was: {e}", RNS.LOG_WARNING)
+        USE_NATIVE_FILTERS = False
+
+class Filter():
+    def handle_frame(self, frame):
+        raise NotImplementedError(f"The handle_frame method was not implemented on {self}")
+
+class HighPass(Filter):
+    def __init__(self, cut):
+        super().__init__()
+        self.cut            = cut
+        self._samplerate    = None
+        self._channels      = None
+        self._filter_states = None
+        self._last_inputs   = None
+        self._alpha         = None
+    
+    def handle_frame(self, frame, samplerate):
+        if len(frame) == 0: return frame
+        if samplerate != self._samplerate:
+            self._samplerate = samplerate
+            dt = 1.0 / self._samplerate
+            rc = 1.0 / (2 * np.pi * self.cut)
+            self._alpha = rc / (rc + dt)
+        
+        if len(frame.shape) == 1: frame_2d = frame.reshape(-1, 1)
+        else: frame_2d = frame
+        
+        samples, channels = frame_2d.shape
+        if self._filter_states is None or self._channels != channels:
+            self._channels = channels
+            self._filter_states = np.zeros(self._channels, dtype=np.float32)
+            self._last_inputs = np.zeros(self._channels, dtype=np.float32)
+        
+        if USE_NATIVE_FILTERS:
+            frame_2d = np.ascontiguousarray(frame_2d, dtype=np.float32)
+            output = np.empty_like(frame_2d, dtype=np.float32)
+            input_ptr = ffi.cast("float *", frame_2d.ctypes.data)
+            output_ptr = ffi.cast("float *", output.ctypes.data)
+            states_ptr = ffi.cast("float *", self._filter_states.ctypes.data)
+            last_inputs_ptr = ffi.cast("float *", self._last_inputs.ctypes.data)
+            
+            native_functions.highpass_filter(input_ptr, output_ptr, samples, channels, float(self._alpha), states_ptr, last_inputs_ptr)
+            
+            result = output.reshape(frame.shape)
+            return result
+
+        else:
+            output = np.empty_like(frame_2d)
+            input_diff_first = frame_2d[0] - self._last_inputs
+            output[0] = self._alpha * (self._filter_states + input_diff_first)
+            
+            input_diff = np.empty_like(frame_2d)
+            input_diff[0] = input_diff_first
+            input_diff[1:] = frame_2d[1:] - frame_2d[:-1]
+
+            for i in range(1, samples):
+                output[i] = self._alpha * (output[i-1] + input_diff[i])
+
+            output = self._alpha * (output + input_diff)
+            
+            self._filter_states = output[-1].copy()
+            self._last_inputs = frame_2d[-1].copy()
+            
+            nframe = output.reshape(frame.shape)
+            return nframe
+
+class LowPass(Filter):
+    def __init__(self, cut):
+        super().__init__()
+        self.cut = cut
+        self._samplerate = None
+        self._channels = None
+        self._filter_states = None
+        self._alpha = None
+    
+    def handle_frame(self, frame, samplerate):
+        if len(frame) == 0:  return frame
+        if samplerate != self._samplerate:
+            self._samplerate = samplerate
+            dt = 1.0 / self._samplerate
+            rc = 1.0 / (2 * np.pi * self.cut)
+            self._alpha = dt / (rc + dt)
+        
+        if len(frame.shape) == 1: frame_2d = frame.reshape(-1, 1)
+        else: frame_2d = frame
+        
+        samples, channels = frame_2d.shape
+        
+        if self._filter_states is None or self._channels != channels:
+            self._channels = channels
+            self._filter_states = np.zeros(self._channels, dtype=np.float32)
+
+        if USE_NATIVE_FILTERS:
+            frame_2d = np.ascontiguousarray(frame_2d, dtype=np.float32)
+            output = np.empty_like(frame_2d, dtype=np.float32)
+            input_ptr = ffi.cast("float *", frame_2d.ctypes.data)
+            output_ptr = ffi.cast("float *", output.ctypes.data)
+            states_ptr = ffi.cast("float *", self._filter_states.ctypes.data)
+            
+            native_functions.lowpass_filter(input_ptr, output_ptr, samples, channels, float(self._alpha), states_ptr)
+            
+            return output.reshape(frame.shape)
+
+        else:
+            output = np.empty_like(frame_2d)        
+            output[0] = self._alpha * frame_2d[0] + (1.0 - self._alpha) * self._filter_states
+            for i in range(1, samples):
+                output[i] = self._alpha * frame_2d[i] + (1.0 - self._alpha) * output[i-1]
+            
+            self._filter_states = output[-1].copy()
+            
+            return output.reshape(frame.shape)
+
+class BandPass(Filter):
+    def __init__(self, low_cut, high_cut):
+        super().__init__()
+        if low_cut >= high_cut: raise ValueError("Low-cut frequency must be less than high-cut frequency")
+        self.low_cut    = low_cut
+        self.high_cut   = high_cut
+        self._high_pass = HighPass(self.low_cut)
+        self._low_pass  = LowPass(self.high_cut)
+    
+    def handle_frame(self, frame, samplerate):
+        # TODO: Remove debug
+        # st = time.time()
+        if len(frame) == 0: return frame        
+        high_passed    = self._high_pass.handle_frame(frame, samplerate)        
+        band_passed    = self._low_pass.handle_frame(high_passed, samplerate)
+        # RNS.log(f"Filter ran in {RNS.prettyshorttime(time.time()-st)}", RNS.LOG_DEBUG)
+        return band_passed
+
+class AGC(Filter):
+    def __init__(self, target_level=-12.0, max_gain=12.0, attack_time=0.0001, release_time=0.002, hold_time=0.001):
+        super().__init__()
+        self.trigger_level     = 0.003
+        self.target_level      = target_level # In dBFS
+        self.max_gain_db       = max_gain
+        self.attack_time       = attack_time
+        self.release_time      = release_time
+        self.hold_time         = hold_time
+        self.target_linear     = 10 ** (target_level / 10)
+        self.max_gain_linear   = 10 ** (max_gain / 10)
+        self._samplerate       = None
+        self._channels         = None
+        self._current_gain_lin = 1.0
+        self._hold_counter     = 0
+        self._block_target_s   = 0.01
+        self._attack_coeff     = None
+        self._release_coeff    = None
+        self._hold_samples     = None
+        
+    def handle_frame(self, frame, samplerate):
+        # TODO: Remove debug
+        # st = time.time()
+        if len(frame) == 0: return frame
+        if len(frame.shape) == 1: frame_2d = frame.reshape(-1, 1)
+        else:                     frame_2d = frame
+        
+        samples, channels = frame_2d.shape
+        if samplerate != self._samplerate:
+            self._samplerate = samplerate
+            self._block_target = int((samples/self._samplerate)/self._block_target_s)
+            self._calculate_coefficients()
+
+        if self._channels is None or self._channels != channels:
+            self._channels = channels
+            self._current_gain_lin = np.ones(channels, dtype=np.float32)
+            self._hold_counter = 0
+
+        if USE_NATIVE_FILTERS:
+            frame_2d = np.ascontiguousarray(frame_2d, dtype=np.float32)
+            output = np.empty_like(frame_2d, dtype=np.float32)            
+            input_ptr = ffi.cast("float *", frame_2d.ctypes.data)
+            output_ptr = ffi.cast("float *", output.ctypes.data)
+            gain_ptr = ffi.cast("float *", self._current_gain_lin.ctypes.data)
+            hold_ptr = ffi.new("int *", self._hold_counter)
+            
+            native_functions.agc_process(
+                input_ptr, output_ptr, samples, channels,
+                float(self.target_linear), float(self.max_gain_linear), 
+                float(self.trigger_level),
+                float(self._attack_coeff), float(self._release_coeff), 
+                float(self._hold_samples),
+                gain_ptr, hold_ptr, int(self._block_target)
+            )
+            
+            self._hold_counter = hold_ptr[0]
+            
+            result = output.reshape(frame.shape)
+            # TODO: Remove debug
+            # RNS.log(f"AGC ran in {RNS.prettyshorttime(time.time()-st)}", RNS.LOG_DEBUG)
+            return result
+
+        else:
+            output = np.empty_like(frame_2d)
+            block_size = max(1, samples // self._block_target)
+            for i in range(0, samples, block_size):
+                block_end = min(i + block_size, samples)
+                block = frame_2d[i:block_end]
+                block_samples = block_end - i
+                
+                rms = np.sqrt(np.mean(block ** 2, axis=0))
+                target_gain = np.where(rms > 1e-9, self.target_linear / np.maximum(rms, 1e-9), self.max_gain_linear)
+                target_gain = np.minimum(target_gain, self.max_gain_linear)
+                smoothed_gain = np.empty_like(target_gain)
+                
+                for ch in range(channels):
+                    if (rms[0] < self.trigger_level): target_gain = self._current_gain_lin
+                    if target_gain[ch] < self._current_gain_lin[ch]:
+                        self._current_gain_lin[ch] = self._attack_coeff * target_gain[ch] + (1 - self._attack_coeff) * self._current_gain_lin[ch]
+                        self._hold_counter = self._hold_samples  # Reset hold counter
+                    else:
+                        if self._hold_counter > 0: self._hold_counter -= block_samples
+                        else: self._current_gain_lin[ch] = self._release_coeff * target_gain[ch] + (1 - self._release_coeff) * self._current_gain_lin[ch]
+                    
+                    smoothed_gain[ch] = self._current_gain_lin[ch]
+                
+                output[i:block_end] = block * smoothed_gain[np.newaxis, :]
+            
+            peak_limit = 0.75
+            current_peaks = np.max(np.abs(output), axis=0)
+            limit_gain = np.where(current_peaks > peak_limit, peak_limit / np.maximum(current_peaks, 1e-9), 1.0)
+
+            if np.any(limit_gain < 1.0): output *= limit_gain[np.newaxis, :]
+            nframe = output.reshape(frame.shape)
+            # TODO: Remove debug
+            # RNS.log(f"AGC ran in {RNS.prettyshorttime(time.time()-st)}", RNS.LOG_DEBUG)
+            return nframe
+    
+    def _calculate_coefficients(self):
+        if self._samplerate:
+            self._attack_coeff = 1.0 - np.exp(-1.0 / (self.attack_time * self._samplerate))
+            self._release_coeff = 1.0 - np.exp(-1.0 / (self.release_time * self._samplerate))
+            self._hold_samples = int(self.hold_time * self._samplerate)
+        else:
+            self._attack_coeff = 0.1
+            self._release_coeff = 0.01
+            self._hold_samples = 1000
\ No newline at end of file
diff --git a/LXST/Mixer.py b/LXST/Mixer.py
index de9677b..2a4cda5 100644
--- a/LXST/Mixer.py
+++ b/LXST/Mixer.py
@@ -15,7 +15,7 @@ class Mixer(LocalSource, LocalSink):
     MAX_FRAMES = 8
     TYPE_MAP_FACTOR = np.iinfo("int16").max
 
-    def __init__(self, target_frame_ms=40, samplerate=None, codec=None, sink=None):
+    def __init__(self, target_frame_ms=40, samplerate=None, codec=None, sink=None, gain=0.0):
         self.incoming_frames  = {}
         self.target_frame_ms  = target_frame_ms
         self.frame_time       = self.target_frame_ms/1000
@@ -23,6 +23,8 @@ class Mixer(LocalSource, LocalSink):
         self.mixer_thread     = None
         self.mixer_lock       = threading.Lock()
         self.insert_lock      = threading.Lock()
+        self.muted            = False
+        self.gain             = gain
         self.bitdepth         = 32
         self.channels         = None
         self.samplerate       = None
@@ -44,6 +46,18 @@ class Mixer(LocalSource, LocalSink):
     def stop(self):
         self.should_run = False
 
+    def set_gain(self, gain=None):
+        if gain == None: self.gain = 0.0
+        else:            self.gain = float(gain)
+
+    def mute(self, mute=True):
+        if mute == True or mute == False: self.muted = mute
+        else:                             self.muted = False
+
+    def unmute(self, unmute=True):
+        if unmute == True or unmute == False: self.muted = unmute
+        else:                                 self.muted = False
+
     def set_source_max_frames(self, source, max_frames):
         with self.insert_lock:
             if not source in self.incoming_frames: self.incoming_frames[source] = deque(maxlen=max_frames)
@@ -78,6 +92,12 @@ class Mixer(LocalSource, LocalSink):
 
             self.incoming_frames[source].append(frame_samples)
 
+    @property
+    def _mixing_gain(self):
+        if   self.muted:       return 0.0
+        elif self.gain == 0.0: return 1.0
+        else:                  return 10**(self.gain/10)
+
     def _mixer_job(self):
         with self.mixer_lock:
             while self.should_run:
@@ -87,11 +107,16 @@ class Mixer(LocalSource, LocalSink):
                     for source in self.incoming_frames.copy():
                         if len(self.incoming_frames[source]) > 0:
                             next_frame = self.incoming_frames[source].popleft()
-                            if source_count == 0: mixed_frame = next_frame
-                            else: mixed_frame = mixed_frame + next_frame
+                            if source_count == 0: mixed_frame = next_frame*self._mixing_gain
+                            else: mixed_frame = mixed_frame + next_frame*self._mixing_gain
                             source_count += 1
 
                     if source_count > 0:
+                        mixed_frame = np.clip(mixed_frame, -1.0, 1.0)
+                        if RNS.loglevel >= RNS.LOG_DEBUG:
+                            if mixed_frame.max() >= 1.0 or mixed_frame.min() <= -1.0:
+                                RNS.log(f"Signal clipped on {self}", RNS.LOG_WARNING)
+
                         if self.codec: self.sink.handle_frame(self.codec.encode(mixed_frame), self)
                         else:          self.sink.handle_frame(mixed_frame, self)
                     else:
diff --git a/LXST/Network.py b/LXST/Network.py
index 5c0f2a2..a0b4468 100644
--- a/LXST/Network.py
+++ b/LXST/Network.py
@@ -128,10 +128,8 @@ class LinkSource(RemoteSource, SignallingReceiver):
                                 else:
                                     decoded_frame = self.codec.decode(frame[1:])
 
-                                if self.pipeline:
-                                    self.sink.handle_frame(decoded_frame, self)
-                                else:
-                                    self.sink.handle_frame(decoded_frame, self, decoded=True)
+                                if self.pipeline: self.sink.handle_frame(decoded_frame, self)
+                                else:             self.sink.handle_frame(decoded_frame, self, decoded=True)
 
                     if FIELD_SIGNALLING in unpacked:
                         super()._packet(data=None, packet=packet, unpacked=unpacked)
diff --git a/LXST/Primitives/Telephony.py b/LXST/Primitives/Telephony.py
index 008f044..217fe9f 100644
--- a/LXST/Primitives/Telephony.py
+++ b/LXST/Primitives/Telephony.py
@@ -11,6 +11,8 @@ from LXST.Sinks import LineSink
 from LXST.Sources import LineSource, OpusFileSource
 from LXST.Generators import ToneSource
 from LXST.Network import SignallingReceiver, Packetizer, LinkSource
+from LXST.Filters import BandPass, AGC
+
 
 PRIMITIVE_NAME = "telephony"
 
@@ -112,6 +114,7 @@ class Signalling():
 class Telephone(SignallingReceiver):
     RING_TIME             = 60
     WAIT_TIME             = 70
+    CONNECT_TIME          = 5
     DIAL_TONE_FREQUENCY   = 382
     DIAL_TONE_EASE_MS     = 3.14159
     JOB_INTERVAL          = 5
@@ -120,7 +123,13 @@ class Telephone(SignallingReceiver):
     ALLOW_ALL             = 0xFF
     ALLOW_NONE            = 0xFE
 
-    def __init__(self, identity, ring_time=RING_TIME, wait_time=WAIT_TIME, auto_answer=None, allowed=ALLOW_ALL):
+    @staticmethod
+    def available_outputs(): return LXST.Sources.Backend().soundcard.all_speakers()
+    
+    @staticmethod
+    def available_inputs(): return LXST.Sinks.Backend().soundcard.all_microphones()
+
+    def __init__(self, identity, ring_time=RING_TIME, wait_time=WAIT_TIME, auto_answer=None, allowed=ALLOW_ALL, receive_gain=0.0, transmit_gain=0.0):
         super().__init__()
         self.identity = identity
         self.destination = RNS.Destination(self.identity, RNS.Destination.IN, RNS.Destination.SINGLE, APP_NAME, PRIMITIVE_NAME)
@@ -132,16 +141,22 @@ class Telephone(SignallingReceiver):
         self.call_handler_lock = threading.Lock()
         self.pipeline_lock = threading.Lock()
         self.caller_pipeline_open_lock = threading.Lock()
+        self.establishment_timeout = self.CONNECT_TIME
         self.links = {}
         self.ring_time = ring_time
         self.wait_time = wait_time
         self.auto_answer = auto_answer
+        self.receive_gain = receive_gain
+        self.transmit_gain = transmit_gain
+        self.use_agc = True
         self.active_call = None
         self.call_status = Signalling.STATUS_AVAILABLE
         self._external_busy = False
         self.__ringing_callback = None
         self.__established_callback = None
         self.__ended_callback = None
+        self.__busy_callback = None
+        self.__rejected_callback = None
         self.target_frame_time_ms = None
         self.audio_output = None
         self.audio_input = None
@@ -184,6 +199,9 @@ class Telephone(SignallingReceiver):
         if type(blocked) == list or blocked == None: self.blocked = blocked
         else: raise TypeError(f"Invalid type for blocked callers: {type(blocked)}")
 
+    def set_connect_timeout(self, timeout):
+        self.establishment_timeout = timeout
+
     def set_announce_interval(self, announce_interval):
         if not type(announce_interval) == int: raise TypeError(f"Invalid type for announce interval: {announce_interval}")
         else:
@@ -202,6 +220,14 @@ class Telephone(SignallingReceiver):
         if not callable(callback): raise TypeError(f"Invalid callback, {callback} is not callable")
         self.__ended_callback = callback
 
+    def set_busy_callback(self, callback):
+        if not callable(callback): raise TypeError(f"Invalid callback, {callback} is not callable")
+        self.__busy_callback = callback
+
+    def set_rejected_callback(self, callback):
+        if not callable(callback): raise TypeError(f"Invalid callback, {callback} is not callable")
+        self.__rejected_callback = callback
+
     def set_speaker(self, device):
         self.speaker_device = device
         RNS.log(f"{self} speaker device set to {device}", RNS.LOG_DEBUG)
@@ -214,11 +240,19 @@ class Telephone(SignallingReceiver):
         self.ringer_device = device
         RNS.log(f"{self} ringer device set to {device}", RNS.LOG_DEBUG)
 
-    def set_ringtone(self, ringtone_path, gain=1.0):
+    def set_ringtone(self, ringtone_path, gain=0.0):
         self.ringtone_path = ringtone_path
         self.ringtone_gain = gain
         RNS.log(f"{self} ringtone set to {self.ringtone_path}", RNS.LOG_DEBUG)
 
+    def enable_agc(self, enable=True):
+        if enable == True: self.use_agc = True
+        else:              self.use_agc = False
+
+    def disable_agc(self, disable=True):
+        if disable == True: self.use_agc = False
+        else:               self.use_agc = True
+
     def set_low_latency_output(self, enabled):
         if enabled:
             self.low_latency_output = True
@@ -243,9 +277,7 @@ class Telephone(SignallingReceiver):
 
     def __timeout_incoming_call_at(self, call, timeout):
         def job():
-            while time.time()<timeout and self.active_call == call:
-                time.sleep(0.25)
-
+            while time.time()<timeout and self.active_call == call: time.sleep(0.25)
             if self.active_call == call and self.call_status < Signalling.STATUS_ESTABLISHED:
                 RNS.log(f"Ring timeout on call from {RNS.prettyhexrep(self.active_call.hash)}, hanging up", RNS.LOG_DEBUG)
                 self.active_call.ring_timeout = True
@@ -255,21 +287,29 @@ class Telephone(SignallingReceiver):
 
     def __timeout_outgoing_call_at(self, call, timeout):
         def job():
-            while time.time()<timeout and self.active_call == call:
-                time.sleep(0.25)
-
+            while time.time()<timeout and self.active_call == call: time.sleep(0.25)
             if self.active_call == call and self.call_status < Signalling.STATUS_ESTABLISHED:
                 RNS.log(f"Timeout on outgoing call to {RNS.prettyhexrep(self.active_call.hash)}, hanging up", RNS.LOG_DEBUG)
                 self.hangup()
 
         threading.Thread(target=job, daemon=True).start()
 
+    def __timeout_outgoing_establishment_at(self, call, timeout):
+        def job():
+            while time.time()<timeout and self.active_call == call: time.sleep(0.25)
+            if self.active_call == call and self.call_status < Signalling.STATUS_RINGING:
+                RNS.log(f"Timeout on outgoing connection establishment to {RNS.prettyhexrep(self.active_call.hash)}, hanging up", RNS.LOG_DEBUG)
+                self.hangup()
+
+        threading.Thread(target=job, daemon=True).start()
+
     def __incoming_link_established(self, link):
-        link.is_incoming  = True
-        link.is_outgoing  = False
-        link.ring_timeout = False
-        link.answered     = False
-        link.profile      = None
+        link.is_incoming    = True
+        link.is_outgoing    = False
+        link.ring_timeout   = False
+        link.answered       = False
+        link.is_terminating = False
+        link.profile        = None
         with self.call_handler_lock:
             if self.active_call or self.busy:
                 RNS.log(f"Incoming call, but line is already active, signalling busy", RNS.LOG_DEBUG)
@@ -314,7 +354,7 @@ class Telephone(SignallingReceiver):
     def __link_closed(self, link):
         if link == self.active_call:
             RNS.log(f"Remote for {RNS.prettyhexrep(link.get_remote_identity().hash)} hung up", RNS.LOG_DEBUG)
-            self.hangup()
+            if not self.active_call.is_terminating: self.hangup()
 
     def set_busy(self, busy):
         self._external_busy = busy
@@ -356,7 +396,7 @@ class Telephone(SignallingReceiver):
                 if self.low_latency_output: self.audio_output.enable_low_latency()
                 return True
 
-    def hangup(self):
+    def hangup(self, reason=None):
         if self.active_call:
             with self.call_handler_lock:
                 terminating_call = self.active_call; self.active_call = None
@@ -375,31 +415,61 @@ class Telephone(SignallingReceiver):
                 self.audio_output = None
                 self.dial_tone = None
                 self.call_status = Signalling.STATUS_AVAILABLE
-                if remote_identity:
-                    RNS.log(f"Call with {RNS.prettyhexrep(remote_identity.hash)} terminated", RNS.LOG_DEBUG)
-                else:
-                    RNS.log(f"Outgoing call could not be connected, link establishment failed", RNS.LOG_DEBUG)
+                if remote_identity: RNS.log(f"Call with {RNS.prettyhexrep(remote_identity.hash)} terminated", RNS.LOG_DEBUG)
+                else: RNS.log(f"Outgoing call could not be connected, link establishment failed", RNS.LOG_DEBUG)
         
-            if callable(self.__ended_callback): self.__ended_callback(remote_identity)
+            if reason == None:
+                if callable(self.__ended_callback):      self.__ended_callback(remote_identity)
+            elif reason == Signalling.STATUS_BUSY:
+                if   callable(self.__busy_callback):     self.__busy_callback(remote_identity)
+                elif callable(self.__ended_callback):    self.__ended_callback(remote_identity)
+            elif reason == Signalling.STATUS_REJECTED:
+                if   callable(self.__rejected_callback): self.__rejected_callback(remote_identity)
+                elif callable(self.__ended_callback):    self.__ended_callback(remote_identity)
 
-    def mute_receive(self):
-        pass
+    def mute_receive(self, mute=True):
+        if self.receive_mixer: self.receive_mixer.mute(mute)
 
-    def mute_transmit(self):
-        pass
+    def unmute_receive(self, unmute=True):
+        if self.receive_mixer: self.receive_mixer.unmute(mute)
 
-    def select_call_profile(self, profile=None):
+    def mute_transmit(self, mute=True):
+        if self.transmit_mixer: self.transmit_mixer.mute(mute)
+
+    def unmute_transmit(self, unmute=True):
+        if self.transmit_mixer: self.transmit_mixer.unmute(unmute)
+
+    def set_receive_gain(self, gain=0.0):
+        self.receive_gain = float(gain)
+        if self.receive_mixer: self.receive_mixer.set_gain(self.receive_gain)
+
+    def set_transmit_gain(self, gain=0.0):
+        self.transmit_gain = float(gain)
+        if self.transmit_mixer: self.transmit_mixer.set_gain(self.transmit_gain)
+
+    def switch_profile(self, profile=None, from_signalling=False):
+        if self.active_call:
+            if self.active_call.profile == profile: return
+            else:
+                if self.call_status == Signalling.STATUS_ESTABLISHED:
+                    self.active_call.profile = profile
+                    self.transmit_codec = Profiles.get_codec(self.active_call.profile)
+                    self.target_frame_time_ms = Profiles.get_frame_time(self.active_call.profile)
+                    if not from_signalling: self.signal(Signalling.PREFERRED_PROFILE+self.active_call.profile, self.active_call)
+                    self.__reconfigure_transmit_pipeline()
+
+    def __select_call_profile(self, profile=None):
         if profile == None: profile = Profiles.DEFAULT_PROFILE
         self.active_call.profile = profile
-        self.select_call_codecs(self.active_call.profile)
-        self.select_call_frame_time(self.active_call.profile)
+        self.__select_call_codecs(self.active_call.profile)
+        self.__select_call_frame_time(self.active_call.profile)
         RNS.log(f"Selected call profile 0x{RNS.hexrep(profile, delimit=False)}", RNS.LOG_DEBUG)
 
-    def select_call_codecs(self, profile=None):
+    def __select_call_codecs(self, profile=None):
         self.receive_codec = Null()
         self.transmit_codec = Profiles.get_codec(profile)
 
-    def select_call_frame_time(self, profile=None):
+    def __select_call_frame_time(self, profile=None):
         self.target_frame_time_ms = Profiles.get_frame_time(profile)
 
     def __reset_dialling_pipelines(self):
@@ -415,9 +485,9 @@ class Telephone(SignallingReceiver):
             self.__prepare_dialling_pipelines()
 
     def __prepare_dialling_pipelines(self):
-        self.select_call_profile(self.active_call.profile)
+        self.__select_call_profile(self.active_call.profile)
         if self.audio_output == None:     self.audio_output = LineSink(preferred_device=self.speaker_device)
-        if self.receive_mixer == None:    self.receive_mixer = Mixer(target_frame_ms=self.target_frame_time_ms)
+        if self.receive_mixer == None:    self.receive_mixer = Mixer(target_frame_ms=self.target_frame_time_ms, gain=self.receive_gain)
         if self.dial_tone == None:        self.dial_tone = ToneSource(frequency=self.dial_tone_frequency, gain=0.0, ease_time_ms=self.dial_tone_ease_ms, target_frame_ms=self.target_frame_time_ms, codec=Null(), sink=self.receive_mixer)
         if self.receive_pipeline == None: self.receive_pipeline = Pipeline(source=self.receive_mixer, codec=Null(), sink=self.audio_output)
 
@@ -473,6 +543,20 @@ class Telephone(SignallingReceiver):
         if self.dial_tone and self.dial_tone.running:
             self.dial_tone.stop()
 
+    def __reconfigure_transmit_pipeline(self):
+        if self.transmit_pipeline and self.call_status == Signalling.STATUS_ESTABLISHED:
+            self.audio_input.stop()
+            self.transmit_mixer.stop()
+            self.transmit_pipeline.stop()
+            self.transmit_mixer = Mixer(target_frame_ms=self.target_frame_time_ms, gain=self.transmit_gain)
+            self.audio_input = LineSource(preferred_device=self.microphone_device, target_frame_ms=self.target_frame_time_ms, codec=Raw(), sink=self.transmit_mixer, filters=self.active_call.filters)
+            self.transmit_pipeline = Pipeline(source=self.transmit_mixer,
+                                              codec=self.transmit_codec,
+                                              sink=self.active_call.packetizer)
+            self.transmit_mixer.start()
+            self.audio_input.start()
+            self.transmit_pipeline.start()
+
     def __open_pipelines(self, identity):
         with self.pipeline_lock:
             if not self.active_call.get_remote_identity() == identity:
@@ -485,12 +569,16 @@ class Telephone(SignallingReceiver):
                     RNS.log(f"Opening audio pipelines for call with {RNS.prettyhexrep(identity.hash)}", RNS.LOG_DEBUG)
                     if self.active_call.is_incoming: self.signal(Signalling.STATUS_CONNECTING, self.active_call)
 
+                    if self.use_agc: self.active_call.filters = [BandPass(250, 8500), AGC()]
+                    else:            self.active_call.filters = [BandPass(250, 8500)]
+
                     self.__prepare_dialling_pipelines()
-                    self.transmit_mixer = Mixer(target_frame_ms=self.target_frame_time_ms)
-                    self.audio_input = LineSource(preferred_device=self.microphone_device, target_frame_ms=self.target_frame_time_ms, codec=Raw(), sink=self.transmit_mixer)
+                    self.active_call.packetizer = Packetizer(self.active_call, failure_callback=self.__packetizer_failure)
+                    self.transmit_mixer = Mixer(target_frame_ms=self.target_frame_time_ms, gain=self.transmit_gain)
+                    self.audio_input = LineSource(preferred_device=self.microphone_device, target_frame_ms=self.target_frame_time_ms, codec=Raw(), sink=self.transmit_mixer, filters=self.active_call.filters)
                     self.transmit_pipeline = Pipeline(source=self.transmit_mixer,
                                                       codec=self.transmit_codec,
-                                                      sink=Packetizer(self.active_call, failure_callback=self.__packetizer_failure))
+                                                      sink=self.active_call.packetizer)
                     
                     self.active_call.audio_source = LinkSource(link=self.active_call, signalling_receiver=self, sink=self.receive_mixer)
                     self.receive_mixer.set_source_max_frames(self.active_call.audio_source, 2)
@@ -524,6 +612,7 @@ class Telephone(SignallingReceiver):
             if not self.active_call:
                 self.call_status = Signalling.STATUS_CALLING
                 outgoing_call_timeout = time.time()+self.wait_time
+                outgoing_establishment_timeout = time.time()+self.establishment_timeout
                 call_destination = RNS.Destination(identity, RNS.Destination.OUT, RNS.Destination.SINGLE, APP_NAME, PRIMITIVE_NAME)
                 if not RNS.Transport.has_path(call_destination.hash):
                     RNS.log(f"No path known for call to {RNS.prettyhexrep(call_destination.hash)}, requesting path...", RNS.LOG_DEBUG)
@@ -537,11 +626,13 @@ class Telephone(SignallingReceiver):
                                                 established_callback=self.__outgoing_link_established,
                                                 closed_callback=self.__outgoing_link_closed)
                     
-                    self.active_call.is_incoming  = False
-                    self.active_call.is_outgoing  = True
-                    self.active_call.ring_timeout = False
-                    self.active_call.profile      = profile
+                    self.active_call.is_incoming    = False
+                    self.active_call.is_outgoing    = True
+                    self.active_call.is_terminating = False
+                    self.active_call.ring_timeout   = False
+                    self.active_call.profile        = profile
                     self.__timeout_outgoing_call_at(self.active_call, outgoing_call_timeout)
+                    self.__timeout_outgoing_establishment_at(self.active_call, outgoing_establishment_timeout)
 
     def __outgoing_link_established(self, link):
         RNS.log(f"Link established for call with {link.get_remote_identity()}", RNS.LOG_DEBUG)
@@ -559,14 +650,15 @@ class Telephone(SignallingReceiver):
                     return
                 elif signal == Signalling.STATUS_BUSY:
                     RNS.log("Remote is busy, terminating", RNS.LOG_DEBUG)
+                    self.active_call.is_terminating = True
                     self.__play_busy_tone()
                     self.__disable_dial_tone()
-                    self.hangup()
+                    self.hangup(reason=Signalling.STATUS_BUSY)
                 elif signal == Signalling.STATUS_REJECTED:
                     RNS.log("Remote rejected call, terminating", RNS.LOG_DEBUG)
                     self.__play_busy_tone()
                     self.__disable_dial_tone()
-                    self.hangup()
+                    self.hangup(reason=Signalling.STATUS_REJECTED)
                 elif signal == Signalling.STATUS_AVAILABLE:
                     RNS.log("Line available, sending identification", RNS.LOG_DEBUG)
                     self.call_status = signal
@@ -594,8 +686,9 @@ class Telephone(SignallingReceiver):
                         if callable(self.__established_callback): self.__established_callback(self.active_call.get_remote_identity())
                         if self.low_latency_output: self.audio_output.enable_low_latency()
                 elif signal >= Signalling.PREFERRED_PROFILE:
-                    self.active_call.profile = signal - Signalling.PREFERRED_PROFILE
-                    self.select_call_profile(self.active_call.profile)
+                    profile = signal - Signalling.PREFERRED_PROFILE
+                    if self.active_call and self.call_status == Signalling.STATUS_ESTABLISHED: self.switch_profile(profile, from_signalling=True)
+                    else:                                                                      self.__select_call_profile(profile)
 
     def __str__(self):
         return f"<lxst.telephony/{RNS.hexrep(self.identity.hash, delimit=False)}>"
\ No newline at end of file
diff --git a/LXST/Sources.py b/LXST/Sources.py
index 163e1f9..d10aaea 100644
--- a/LXST/Sources.py
+++ b/LXST/Sources.py
@@ -152,7 +152,7 @@ class LineSource(LocalSource):
     MAX_FRAMES       = 128
     DEFAULT_FRAME_MS = 80
 
-    def __init__(self, preferred_device=None, target_frame_ms=DEFAULT_FRAME_MS, codec=None, sink=None):
+    def __init__(self, preferred_device=None, target_frame_ms=DEFAULT_FRAME_MS, codec=None, sink=None, filters=None):
         self.preferred_device = preferred_device
         self.frame_deque      = deque(maxlen=self.MAX_FRAMES)
         self.target_frame_ms  = target_frame_ms
@@ -165,6 +165,11 @@ class LineSource(LocalSource):
         self._codec           = None
         self.codec            = codec
         self.sink             = sink
+        self.filters          = None
+
+        if filters != None:
+            if type(filters) == list: self.filters = filters
+            else:                     self.filters = [filters]
 
     @property
     def codec(self): return self._codec
@@ -218,6 +223,8 @@ class LineSource(LocalSource):
             with self.backend.get_recorder(samples_per_frame=backend_samples_per_frame) as recorder:
                 while self.should_run:
                     frame_samples = recorder.record(numframes=self.samples_per_frame)
+                    if self.filters != None:
+                        for f in self.filters: frame_samples = f.handle_frame(frame_samples, self.samplerate)
                     if self.codec:
                         frame = self.codec.encode(frame_samples)
                         if self.sink and self.sink.can_receive(from_source=self):
diff --git a/LXST/_version.py b/LXST/_version.py
index 3d26edf..df12433 100644
--- a/LXST/_version.py
+++ b/LXST/_version.py
@@ -1 +1 @@
-__version__ = "0.4.1"
+__version__ = "0.4.2"
diff --git a/Makefile b/Makefile
index b4b0a82..52298c4 100644
--- a/Makefile
+++ b/Makefile
@@ -2,8 +2,9 @@ all: release
 
 clean:
 	@echo Cleaning...
-	-rm -r ./build
-	-rm -r ./dist
+	-sudo rm -rf ./build
+	-rm -rf ./dist
+	-rm -r ./LXST/__pycache__
 
 remove_symlinks:
 	@echo Removing symlinks for build...
@@ -18,7 +19,19 @@ create_symlinks:
 	-ln -s ../LXST/ ./examples/LXST
 
 build_wheel:
+	cp ./lib/0.4.2/* ./LXST/
 	python3 setup.py sdist bdist_wheel
+	-(rm ./LXST/*.so)
+	-(rm ./LXST/*.dll)
+	-(rm ./LXST/*.dylib)
+
+native_libs:
+	./march_build.sh
+
+persist_libs:
+	-cp ./libs/dev/*.so ./libs/static/
+	-cp ./libs/dev/*.dll ./libs/static/
+	-cp ./libs/dev/*.dylib ./libs/static/
 
 release: remove_symlinks build_wheel create_symlinks
 
diff --git a/build_wheels.sh b/build_wheels.sh
new file mode 100755
index 0000000..48df71d
--- /dev/null
+++ b/build_wheels.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+# This script is used to run the binary wheel builds
+# inside docker containers for multi-arch compilation
+set -e -x
+
+yum install -y gcc gcc-c++ make codec2-devel codec2
+
+PYTHON_VERSIONS=(
+    "cp311-cp311"
+    "cp312-cp312"
+    "cp313-cp313"
+    "cp314-cp314"
+)
+
+for PY_TAG in "${PYTHON_VERSIONS[@]}"; do
+    PYBIN="/opt/python/${PY_TAG}/bin"
+    
+    if [ ! -d "$PYBIN" ]; then
+        echo "Python version not found: $PYBIN"
+        continue
+    fi
+    
+    echo "Building with: $PYBIN"
+    "${PYBIN}/pip" install cffi
+    "${PYBIN}/pip" wheel /io/ -w wheelhouse/
+done
\ No newline at end of file
diff --git a/examples/filters.py b/examples/filters.py
new file mode 100644
index 0000000..05768cd
--- /dev/null
+++ b/examples/filters.py
@@ -0,0 +1,23 @@
+import RNS
+import LXST
+import sys
+import time
+
+from LXST.Filters import BandPass, AGC
+
+target_frame_ms  = 40
+raw              = LXST.Codecs.Raw()
+
+filters      = [BandPass(200, 8500), AGC()]
+
+line_sink    = LXST.Sinks.LineSink()
+mixer        = LXST.Mixer(target_frame_ms=target_frame_ms, sink=line_sink)
+line_source  = LXST.Sources.LineSource(target_frame_ms=target_frame_ms, codec=raw, sink=mixer, filters=filters)
+
+mixer.start()
+line_source.start()
+print("Hit enter stop"); input()
+
+line_source.stop()
+
+time.sleep(0.5)
\ No newline at end of file
diff --git a/fetch_libs.sh b/fetch_libs.sh
new file mode 100755
index 0000000..aef8f95
--- /dev/null
+++ b/fetch_libs.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+TARGET_DIR="${1:-./lib/dev}"
+mkdir -p "$TARGET_DIR"
+
+echo "Copying native libraries to $TARGET_DIR..."
+find ./build -name "filterlib*.*" -type f \( -name "*.so" -o -name "*.dll" -o -name "*.dylib" \) -exec cp {} "$TARGET_DIR/" \;
+
+echo "Done. Copied files:"
+ls -lh "$TARGET_DIR/"
\ No newline at end of file
diff --git a/march_build.sh b/march_build.sh
new file mode 100755
index 0000000..d8ed8f4
--- /dev/null
+++ b/march_build.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+
+docker run --rm -v $(pwd):/io quay.io/pypa/manylinux_2_34_x86_64 /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/musllinux_1_2_x86_64 /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/manylinux_2_31_armv7l /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/manylinux_2_34_aarch64 /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/manylinux_2_39_riscv64 /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/musllinux_1_2_aarch64 /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/musllinux_1_2_armv7l /io/build_wheels.sh
+docker run --rm -v $(pwd):/io quay.io/pypa/musllinux_1_2_riscv64 /io/build_wheels.sh
+
+./fetch_libs.sh
\ No newline at end of file
diff --git a/setup.py b/setup.py
index f87ac21..faeb282 100644
--- a/setup.py
+++ b/setup.py
@@ -1,10 +1,17 @@
 import setuptools
+from setuptools import setup, Extension
+from setuptools.command.build_ext import build_ext
+import os
+import platform
 
-with open("README.md", "r") as fh:
-    long_description = fh.read()
+BUILD_EXTENSIONS = True
 
+with open("README.md", "r") as fh: long_description = fh.read()
 exec(open("LXST/_version.py", "r").read())
 
+if BUILD_EXTENSIONS: extensions = [ Extension("LXST.filterlib", sources=["LXST/Filters.c"], include_dirs=["LXST"], language="c"), ]
+else:                extensions = []
+
 packages = setuptools.find_packages(exclude=[])
 packages.append("LXST.Utilities")
 packages.append("LXST.Primitives.hardware")
@@ -16,6 +23,13 @@ package_data = {
     "Codecs/libs/pyogg/libs/win_amd64/*",
     "Codecs/libs/pyogg/libs/macos/*",
     "Sounds/*",
+    ],
+"LXST": [
+    "Filters.h",
+    "Filters.c",
+    "filterlib*.so",
+    "filterlib*.dll",
+    "filterlib*.dylib",
     ]
 }
 
@@ -30,6 +44,8 @@ setuptools.setup(
     url="https://git.unsigned.io/markqvist/lxst",
     packages=packages,
     package_data=package_data,
+    ext_modules=extensions,
+    cmdclass={"build_ext": build_ext},
     classifiers=[
         "Programming Language :: Python :: 3",
         "License :: Other/Proprietary License",
@@ -40,11 +56,12 @@ setuptools.setup(
             'rnphone=LXST.Utilities.rnphone:main',
         ]
     },
-    install_requires=["rns>=1.0.3",
-                      "lxmf>=0.9.1",
+    install_requires=["rns>=1.0.4",
+                      "lxmf>=0.9.3",
                       "soundcard>=0.4.5",
                       "numpy>=2.3.4",
                       "pycodec2>=4.1.0",
-                      "audioop-lts>=0.2.1;python_version>='3.13'"],
-    python_requires=">=3.7",
+                      "audioop-lts>=0.2.1;python_version>='3.13'",
+                      "cffi>=1.17.1"],
+    python_requires=">=3.11",
 )