Here's what I send: 948 7.015754 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2380ms, GSM compression 952 7.036101 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2420ms, GSM compression 953 7.036141 192.168.2.2 -> 192.168.2.1 IAX2 DTMF, source call# 1, timestamp 2383ms digit 2 957 7.055796 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2440ms, GSM compression 960 7.075771 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2460ms, GSM compression 963 7.095768 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2480ms, GSM compression 966 7.115772 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2500ms, GSM compression 969 7.135817 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2520ms, GSM compression 972 7.155791 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2540ms, GSM compression 975 7.175796 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2560ms, GSM compression 978 7.195801 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2580ms, GSM compression 981 7.215833 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2600ms, GSM compression 984 7.235809 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2620ms, GSM compression 987 7.255807 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2640ms, GSM compression 991 7.275811 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2660ms, GSM compression 995 7.295848 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2680ms, GSM compression 999 7.316140 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2700ms, GSM compression 1000 7.316180 192.168.2.2 -> 192.168.2.1 IAX2 DTMF, source call# 1, timestamp 2683ms digit 8 1004 7.335820 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2720ms, GSM compression 1007 7.355815 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2740ms, GSM compression 1010 7.375847 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2760ms, GSM compression 1013 7.395818 192.168.2.2 -> 192.168.2.1 IAX2 Mini packet, source call# 1, timestamp 2780ms, GSM compression Here's what I receive 992 7.281347 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2440ms, GSM compression 996 7.301376 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2460ms, GSM compression 1001 7.317756 192.168.2.1 -> 192.168.2.2 IAX2 IAX, source call# 24, timestamp 2683ms ACK 1035 7.541428 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2480ms, GSM compression 1039 7.561411 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2500ms, GSM compression 1043 7.581398 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2520ms, GSM compression 1048 7.597743 192.168.2.1 -> 192.168.2.2 IAX2 IAX, source call# 24, timestamp 2963ms ACK 1082 7.821450 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2540ms, GSM compression 1086 7.841445 192.168.2.1 -> 192.168.2.2 IAX2 Mini packet, source call# 24, timestamp 2560ms, GSM compression May 9 11:05:38 WARNING[29123]: dsp.c:1508 ast_dsp_process: frame changed: 0002.0040@0.0 -> 0001.0032@0.0 May 9 11:05:38 WARNING[29123]: chan_iax2.c:3311 calc_timestamp: detected CNG or DTMF frame, zeroing p->notsilenttx. May 9 11:05:39 WARNING[29123]: dsp.c:1508 ast_dsp_process: frame changed: 0002.0040@0.0 -> 0001.0038@0.0 May 9 11:05:39 WARNING[29123]: chan_iax2.c:3311 calc_timestamp: detected CNG or DTMF frame, zeroing p->notsilenttx. May 9 11:05:39 WARNING[29123]: dsp.c:1508 ast_dsp_process: frame changed: 0002.0040@0.0 -> 0001.0033@0.0 May 9 11:05:39 WARNING[29123]: chan_iax2.c:3311 calc_timestamp: detected CNG or DTMF frame, zeroing p->notsilenttx.