7960G Phone rings, but no voice

Hi all,

 

I was hoping you could help me troubleshoot a strange voice issue. I have 2 routers running CME 8.6 that are configured in a VRF.

Router 1 Config

!

boot system flash c2800nm-adventerprisek9_ivs_li-mz.124-24.T8.bin

!

voice vrf PE1toMod1

!

voice service voip

 allow-connections h323 to h323

 allow-connections h323 to sip

 allow-connections sip to sip

 fax protocol cisco

 h323

 sip

  registrar server expires max 600 min 60

!

dial-peer voice 1 voip

 destination-pattern 2001

 session target ipv4:10.85.85.2

 dtmf-relay cisco-rtp

!

!

gateway

 timer receive-rtp 1200

!

!

!

gatekeeper

 shutdown

!

!

telephony-service

 max-ephones 5

 max-dn 5

 ip source-address 172.16.8.8 port 2000

 cnf-file location flash:

 cnf-file perphone

 load 7961 SCCP41.9-1-1SR1S.loads

 time-zone 6

 max-conferences 8 gain -6

 transfer-system full-consult

 create cnf-files version-stamp Jan 01 2002 00:00:00

!

!

ephone-dn  2  dual-line

 number 1002

!

!

ephone  2

 no multicast-moh

 device-security-mode none

 mac-address XXXX.XXXX.XXXX

 type 7961GE

 button  1:2

 

Router 2 Config:

!

boot system flash c2800nm-adventerprisek9_ivs_li-mz.124-24.T8.bin

!


voice service voip

 allow-connections h323 to h323

 allow-connections h323 to sip

 allow-connections sip to sip

 fax protocol cisco

 h323

 sip

  registrar server expires max 600 min 60


dial-peer voice 1 voip

 destination-pattern 1002

 session target ipv4:172.16.8.8

 dtmf-relay cisco-rtp

!

!

gateway

 timer receive-rtp 1200

!

!

!

gatekeeper

 shutdown

!

!

telephony-service

 max-ephones 5

 max-dn 5

 ip source-address 10.85.85.2 port 2000

 cnf-file location flash:

 cnf-file perphone

 load 7961 SCCP41.9-1-1SR1S.loads

 time-zone 6

 max-conferences 8 gain -6

 transfer-system full-consult

 create cnf-files version-stamp Jan 01 2002 00:00:00

!

!

ephone-dn  1  dual-line

 number 2001

!

!

ephone  1

 no multicast-moh

 device-security-mode none

 mac-address XXXX.XXXX.XXXX

 type 7961GE

 button  1:1



Each phone will ring when dialed, but there is no audio. I ran a few debuggers "debug cch323 rtp" and it appears data is flowing via rtp. When the phoens are dialed and answerd, I ran a "show voip rtp connections" on each router and they both showed active connections.


I tried different codecs under the ephone. Any ideas? Could it be older code, either IOS or phone?


ETA: From the phone I can "??" to get the phone stats. RCVR Pakets : 0


I can ping from phone to phone



Comments

  • I don't know if you have answered this one already on your own, but I wanted to ask a few questions on some ideas that I had on this. One, have you made sure that all devices are reachable? I was thinking that maybe IP Routing was not enabled. I know that I have a lot of customers that forget this one and think to far ahead...hahaha maybe me also.

    Also, Allowed ip addresses in your SIP configuration? The fact that they ring shows that signalling is working but maybe RTP can't reach all devices.

     

    Just some thoughts,

    Good luck,

    Keith

  • You might try this:

    voice service voip

     no ip address trusted authenticate

  • Hi jfaranda,

    I could be wrong here but i cant see your voice vrf XXXXXX command on your second router.

     

    Thanks

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