[cisco-voip] Codec Negotiation in Cisco 2600

[Muqeemuddin Syed]

codec mismatch will lead to disconnected calls and not one way speech. One
way speech is normally a result of routing. check the routing

On 1/17/06, Uthayakumar,Sasikumar [DBA] <sasikumar.u at dba-corp.com> wrote:
>
>  Hi,
>
>             I'm configuring Cisco 2600 router to make VoIP calls, I'm able
> to make calls from a PC to a PSTN phone, but the problem is the voice is not
> audible at one end.
>
> At the PC end I'm able to hear what is communicated at the PSTN end and
> I'm not able to hear at the PSTN end.
>
> I have used codec as g711alaw for all the VOIP Dial-peers and even I have
> given voice-class priority to g711alaw.
>
> But while making calls to the PSTN end, the Router decides the Negotiated
> codec to be g711ulaw.
>
> Can any one help me out in resolving this issue?
>
>
>
> The below is my configuration details
>
>
>
> voice-card 1
>
> !
>
> ip subnet-zero
>
> !
>
> !
>
> !
>
> ip multicast-routing
>
> no ip dhcp-client network-discovery
>
> frame-relay switching
>
> mgcp modem passthrough voip codec g711alaw
>
> mgcp codec g711alaw packetization-period 10
>
> isdn switch-type primary-net5
>
> call rsvp-sync
>
> voice rtp send-recv
>
> !
>
> voice service pots
>
> !
>
> voice service voip
>
> !
>
> voice class codec 99
>
>  codec preference 1 g711alaw
>
> !
>
> voice class codec 100
>
>  codec preference 1 g711alaw
>
> !
>
> !
>
> !
>
> !
>
> !
>
> !
>
> !
>
> controller E1 1/0
>
>  framing NO-CRC4
>
>  clock source internal
>
>  channel-group 5 timeslots 7
>
>  pri-group timeslots 5,16
>
> !
>
> gw-accounting h323
>
> gw-accounting h323 vsa
>
> gw-accounting voip
>
> !
>
> interface Ethernet0/0
>
>  ip address 192.168.1.189 255.255.255.0
>
>  no ip mroute-cache
>
>  full-duplex
>
>  priority-group 15
>
> !
>
> interface Serial1/0:5
>
>  no ip address
>
>  no logging event link-status
>
> !
>
> interface Serial1/0:15
>
>  no ip address
>
>  no logging event link-status
>
>  isdn switch-type primary-net5
>
>  isdn incoming-voice voice
>
>  no cdp enable
>
> !
>
> ip classless
>
> ip route 0.0.0.0 0.0.0.0 192.168.1.86
>
> no ip http server
>
> !
>
> !
>
> !
>
> !
>
> voice-port 1/0:15
>
> !
>
> dial-peer cor custom
>
> !
>
> !
>
> !
>
> dial-peer voice 1500 pots
>
>  application session
>
>  destination-pattern [0-9]..T
>
> !
>
> dial-peer voice 501 voip
>
> application session
>
>  destination-pattern 9.........
>
>  session protocol sipv2
>
>  session target sip-server
>
>  codec g711alaw
>
> !
>
> dial-peer voice 601 voip
>
>  application session
>
>  destination-pattern [0-9]..T
>
>  session protocol sipv2
>
>  session target sip-server
>
>  codec g711alaw
>
> !
>
> dial-peer voice 700 voip
>
>  application session
>
>  session protocol sipv2
>
>  session target sip-server
>
>  codec g711alaw
>
> !
>
> dial-peer voice 900 voip
>
>  application session
>
>  session protocol sipv2
>
>  session target sip-server
>
> codec g711alaw
>
> !
>
> dial-peer voice 800 pots
>
>  application session
>
>  destination-pattern [0-9]..T
>
>  direct-inward-dial
>
>  port 1/0:15
>
> !
>
> dial-peer voice 1800 pots
>
>  application session
>
>  destination-pattern [0-9]..T
>
>  direct-inward-dial
>
>  port 1/0:15
>
> !
>
> dial-peer voice 1801 voip
>
>  application session
>
>  destination-pattern [0-9]..T
>
>  session protocol sipv2
>
>  session target sip-server
>
>  dtmf-relay cisco-rtp
>
>  codec g711alaw
>
> !
>
> dial-peer voice 2000 pots
>
> !
>
> gateway
>
> !
>
> sip-ua
>
>  retry invite 4
>
>  retry response 3
>
>  retry bye 2
>
>  retry cancel 2
>
>  sip-server ipv4:192.168.1.86
>
> !
>
> !
>
> line con 0
>
> line aux 0
>
> line vty 0 4
>
>  password sip
>
>  login
>
> line vty 5 14
>
>  password cisco
>
>  login
>
> line vty 15
>
>  password cisco
>
>  login
>
>  modem autoconfigure discovery
>
> !
>
> !
>
> end
>
>
>
>
>
>
>
>   *Best Regards*
>
> *Sasikumar*
>
>
>
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>
>
>
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