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New Member

IPIPGW SIP to H323 codec negotiation

I try to setup the following scenario:

Asterisk --> SIP --> IPIPGW --> H323 --> CUCM --> SCCP --> IPPhone

When I setup a call from asterisk, this fails due to a codec mismatch in the IPIPGW:

1267 : 134 9889630ms.1 +-1 pid:1 Answer 2002 connecting

dur 00:00:00 tx:0/0 rx:0/0

IP 172.20.0.250:12578 SRTP: off rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g711ulaw

media inactive detected:n media contrl rcvd:n/a timestamp:n/a

1267 : 135 9889640ms.1 +-1 pid:300 Originate 7090 connecting

dur 00:00:00 tx:0/0 rx:0/0

IP 0.0.0.0:0 SRTP: off rtt:0ms pl:0/0ms lost:0/0/0 delay:0/0/0ms g729r8 pre-ietf

media inactive detected:n media contrl rcvd:n/a timestamp:n/a

Telephony call-legs: 0

However I force G.711 under the dial-peers, for some reason the outbound call-legg stil tries G.729. I also tried to force it using a voice-class codec. The same result.

During call-setup I can see that dial-peer 1 is matched as the inbound dial-peer, so I am not matching the default-dialpeer..

This is my configuration.

voice service voip

allow-connections h323 to sip

allow-connections sip to h323

fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback cisco

modem passthrough nse codec g711alaw

!

!

!

voice class codec 1

codec preference 1 g711ulaw

codec preference 2 g711alaw

!

!

!

voice class h323 1

h225 timeout tcp establish 3

h225 connect-passthru

call start fast

telephony-service ccm-compatible

ccm-compatible

!

!

dial-peer voice 200 voip

destination-pattern 20..

session protocol sipv2

session target sip-server

dtmf-relay rtp-nte

codec g711ulaw

no vad

!

dial-peer voice 300 voip

destination-pattern 7090

voice-class h323 1

session target ipv4:172.20.0.1

dtmf-relay rtp-nte

codec g711ulaw

no vad

!

dial-peer voice 1 voip

incoming called-number .

dtmf-relay rtp-nte

codec g711ulaw

!

dial-peer voice 500 pots

destination-pattern 0T

port 0/0/0:15

Any ideas?

3 REPLIES

Re: IPIPGW SIP to H323 codec negotiation

the incoming dial-peer on the h323 gateway what codec it uses ?

New Member

Re: IPIPGW SIP to H323 codec negotiation

G.711ulaw.

This is dial-peer 1 (pid:1) on the IPIPGW

(My H.323 endpoint is the CUCM server... with a region that is configured for G.711)

Re: IPIPGW SIP to H323 codec negotiation

try to make dailpeer 1 like

dial-peer voice 1 voip

destination-pattern 7090

incoming called-number .

session target ipv4:172.20.0.1

codec g711ulaw

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