HELP no voice on SRST outbound calls

[Sascha Monteiro]

Hi,

2651XM 12.3(7) CCM3.3(3)sr3

on fallback: inbound calls are fine

but outbound calls, no voice!

(I had one-way voice on MGCP in 12.3(4)T...)

no errors...

Any ideas???

-----config-----

ccm-manager fallback-mgcp

ccm-manager mgcp

ccm-manager music-on-hold

!

!

controller E1 0/1

pri-group timeslots 1-10,16 service mgcp

!

interface FastEthernet0/0

ip address 10.1.240.5 255.255.255.240

duplex auto

speed auto

h323-gateway voip bind srcaddr 10.1.240.5

!

interface Serial0/1:15

no ip address

no logging event link-status

isdn switch-type primary-net5

isdn incoming-voice voice

isdn bchan-number-order ascending

no cdp enable

!

voice-port 0/1:15

!

mgcp

mgcp call-agent 10.1.240.4 2427 service-type mgcp version 0.1

mgcp dtmf-relay voip codec all mode out-of-band

mgcp rtp unreachable timeout 1000 action notify

mgcp package-capability rtp-package

no mgcp package-capability res-package

mgcp package-capability sst-package

no mgcp package-capability fxr-package

no mgcp timer receive-rtcp

mgcp sdp simple

mgcp fax t38 inhibit

mgcp rtp payload-type g726r16 static

!

mgcp profile default

!

!

dial-peer voice 10 pots

destination-pattern 1T

direct-inward-dial

port 0/1:15

!

call-manager-fallback

secondary-dialtone 1

max-conferences 4

timeouts interdigit 3

ip source-address 10.1.240.5 port 2000

max-ephones 10

max-dn 20

time-format 24

date-format dd-mm-yy

!

[Sascha Monteiro]

12.3(7)T ....sorry, forgot the T

[sarmentrout.bok77]

Have you tried using the 'voice rtp send-recv' global configuration command?

Cisco recommends "command should be enabled only when the voice path must be cut-through (established) in both the backward and forward directions before a Connect message is received from the destination switch."

You may also want to try this config as I know it should work without fail. The only difference between your configuration and mine is that you are using European T1s and not the full T1. I have the same version of code and don't have any problems... You notice I added the 'isdn bind...' command under the D-channel as well as the global 'call app...' command and the 'application mgcpapp' and 'incoming called...' commands under the pots dial peers.

interface Serial0/1:15

no ip address

no logging event link-status

isdn switch-type primary-net5

isdn incoming-voice voice

isdn bchan-number-order ascending

isdn bind-l3 ccm-manager

no cdp enable

!

call application alternate DEFAULT

!

dial-peer voice 10 pots

application mgcpapp

incoming called-number .

destination-pattern 1T

direct-inward-dial

port 0/1:15

Hope this helps...

[Sascha Monteiro]

Hi, thanks but I have already tried the exact same config you have send, but removed the application mgcpapp later and made no difference.

I have set the voice rtp send-recv, and the isdn bind-l3 was there, but I think it is removed when it's in fallback mode....

thanks anyway

[adignan]

What are you using for DSP's in your 2651? AIM or NM-HDV? Have you tried a different IOS? Are you experiencing one way audio? Just to clarify, when you are in SRST mode the call exits the gateway correctly, you can answer the call from an external phone you just don't get any audio?

[Sascha Monteiro]

we are using AIM

I used 12.3(4)T3, but we had one-way voice on normal MGCP calls.

But now MGCP works fine, but no audio on outgoing calls in SRST mode (call setup works fine though).

Incoming calls are fine.

[adignan]

Do you have the commands below:

network-clock-participate wic 0

network-clock-select 1 T1 0/0

Obviously you have to change the slot number accordingly. Also, have you tried going with something like 12.2(15)ZJ3? It is a solid IOS.

[Sascha Monteiro]

yep, they were in...:

network-clock-participate wic 0

network-clock-select 1 E1 0/0

I can try that version, does it work with AIM/MGCP/SRST ok?

cheers!

[adignan]

Sure does. I am just about finished with a 50 site IPT install with a 2621XM at each site. I am using 12.2(15)ZJ3 at each site w/ AIM/MGCP/SRST with no issues. My config looks pretty similar to yours with the exception that I do not have h.323 bound to any interfaces but that shouldn't be affecting you (although it is worth a shot). Feel free to e-mail me at adignan@berbee.com and I can send you my configs for reference if you would like.

/andy

[Sascha Monteiro]

ok, thanks

btw, I added the h323 bind later too see if the problems would go away....not removed them --yet--

thanks,

I will try that version!

[ptredway]

This is actually a bug with 12.3(7) code. TAC is aware of the issue and has a 12.3(7).11.T01 code that fixes this issue. It unfortunately is not on CCO at this point.

Bug id: CSCed79214

Please let me know if you have any more questions.