[cisco-voip] Transcoding Problems - 2821 router with PVDM2-48

[Kevin Thorngren]

Hi Jason,

In the CCM traces do you see a line similar to the following, when the  
transcoder is being invoked, followed by a list of transcoders in the  
assigned MRGL?
MediaResourceManager::waiting_MrmAllocateMtpResourceReq - MRGL  
SEARCH,TRY CREATING CHILD USING MRGL LIST

The Transcoder will report how many resources it supports to CCM when  
it registers.  CCM won't need to query the Transcoder for each call to  
determine resource availability as it will keep track of what it uses.

Is your GW configured to support g729ar8 or g729abr8 to match the  
Transcoder?

I have seen before where the voice class code is configured with  
g729r8.  There is not a common codec in this case and the call will  
fail.

Kevin

On Apr 17, 2006, at 7:37 PM, Jason Evans wrote:

>
> I am trying to configure my 2821’s at remote sites (with a PVDM2-48  
> DSP card) so that they can transcode b/w g711 and g729, thereby giving  
> users across the WAN the ability to use ad-hoc/meet-me conferencing. I  
> have configured the 2821 with the following:
>  
> IOS version is 12.3(8r)T7
>  
> voice-card 0
>  dspfarm
>  dsp services dspfarm
> !
> sccp local GigabitEthernet0/1
> sccp ccm 172.21.1.22 identifier 3 version 4.0
> sccp ccm 172.21.1.21 identifier 2 version 4.0
> sccp ccm 172.21.1.20 identifier 1 version 4.0
> sccp ip precedence 1
> sccp
> !
> sccp ccm group 1
>  description NY Primary CM
>  bind interface GigabitEthernet0/1
>  associate ccm 3 priority 3
>  associate ccm 2 priority 2
>  associate ccm 1 priority 1
>  associate profile 1 register DC-TRANS
> !
> dspfarm profile 1 transcode
>  description transcoding for ad-hoc conf calls
>  codec g711ulaw
>  codec g711alaw
>  codec g729ar8
>  codec g729abr8
>  codec gsmfr
>  maximum sessions 2
>  associate application SCCP
>  
> I have also followed the instructions here  
> http://www.cisco.com/en/US/products/sw/voicesw/ps556/ 
> products_administration_guide_chapter09186a00801ec5bf.html#42346 … for  
> configuring CM with media resource and transcoder resource.
>  
> The IOS GW at the remote site is registered with CM as an IOS MTP and  
> assigned to the proper device pool. I can see that the status is  
> “Associated.” Also, the Media Resource Group on CM has this  
> transcoding resource added and the List is assigned to the device  
> pool. Everything here looks good.
>  
> Show dspfarm all produces:
>  
> ---------------------------------------------
> Dspfarm Profile Configuration
>  
>  Profile ID = 1, Service = TRANSCODING, Resource ID = 1
>  Profile Description : transcoding for ad-hoc conf calls
>  Profile Admin State : UP
>  Profile Operation State : ACTIVE
>  Application : SCCP   Status : ASSOCIATED
>  Resource Provider : FLEX_DSPRM   Status : UP
>  Number of Resource Configured : 2
>  Number of Resource Available : 2
>  Codec Configuration
>  Codec : g711ulaw, Maximum Packetization Period : 30
>  Codec : g711alaw, Maximum Packetization Period : 30
>  Codec : g729ar8, Maximum Packetization Period : 60
>  Codec : g729abr8, Maximum Packetization Period : 60
>  Codec : gsmfr, Maximum Packetization Period : 20
>  
>  
> SLOT DSP VERSION  STATUS CHNL USE   TYPE   RSC_ID BRIDGE_ID PKTS_TXED  
> PKTS_RXED
>  
> 0    2   4.4.6    UP     N/A  FREE  xcode  1      -         -         -
> 0    2   4.4.6    UP     N/A  FREE  xcode  1      -         -         -
>  
> Total number of DSPFARM DSP channel(s) 2
> ----------------------------------------------------------------------
>  
> However, when I place a call from the remote site to a phone in NY,  
> press conference to bring in another phone in NY and join, I get a  
> fast busy on the remote phone while the 2 NY phones join the  
> conference resource fine.
>  
> There is no activity on the remote IOS GW as I’m debugging SCCP and  
> DSP. Also looking through the CM traces, it never tries or queries the  
> remote router for its DSP resources – it just says
>  
> 04/17/2006 18:55:39.556 CCM|MRM::waiting_AllocateMtpResourceErr -  
> ERROR - no resources are available -- ci =
>  
> What am I missing here? Does the DSP resource have to be in the same  
> location as the CM Cluster? Why is CM not even trying to use the  
> resources I have allocated if everything is registered properly?
>  
> Thanks in advance!
>  
> Jason
>  
>  
>  
> _______________________________________________
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> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
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