We are almost consistently getting this error on users after they are connected anywhere from 2-10 minutes. The system immediately hangs up following this message. Jun 23 16:51:23 WARNING[17314]: chan_iax2.c:1717 attempt_transmit: Max retries exceeded to host xxx.xxx.xxx.xxx on IAX2/xxxx-14 (type = 6, subclass = 2, ts=479554, seqno=125) A google search did not reveal any useful information on this issue. Scott England