I have an IPT network consisting of 2811 with CCME 4 - IOS ver. 12.4(9)T and 7961 and 7911 phones. Making or receiving calls internally between phones works and sounds good, but I have problems with calls established using dial-peers. These calls are noisy so much that you barely hear a person at the other end of the line, but this problem is pertinent only to calls involving 7911 phones. Calls with 7961 have good quality sound even for calls trough dial-peer. Is this some kind of codec problem or what?
Here is my config relevant for IPT:
! voice-card 0 no dspfarm ! ! ! voice class codec 1 codec preference 1 g711alaw codec preference 2 g729r8 codec preference 3 clear-channel ! dial-peer voice 1009 voip description NACIONALNO translation-profile outgoing VOIP-OUT destination-pattern [2-8]...... rtp payload-type cisco-clear-channel 116 modem passthrough nse codec g711alaw voice-class codec 1 session target ipv4:85.114.35.42 dtmf-relay h245-signal h245-alphanumeric fax-relay ecm disable fax protocol pass-through g711alaw ip qos dscp af41 signaling no vad supplementary-service pass-through ! ! telephony-service load 7910 P00403020214 load 7960-7940 P00305000301 load 7961 cnu41.2-7-6-26.sbn load 7911 apps11.1-0-0-72.sbn max-ephones 42 max-dn 144 ip source-address 192.168.1.1 port 2000 auto assign 1 to 2 dialplan-pattern 1 9.. extension-length 2 max-conferences 8 gain -6 transfer-system full-consult create cnf-files version-stamp 7960 Sep 06 2006 19:35:22 ! ! ephone-dn 1 dual-line number 900 ! ! ephone-dn 2 dual-line number 901 ! ! ephone 1 no multicast-moh mac-address 0017.95D0.1B02 type 7961 button 1:1 ! ! ! ephone 2 no multicast-moh mac-address 0019.0670.D3D4 type 7911 button 1:2 ! !
B.R. Igor