Max transcoding connections

[VON CLAWSON]

I seem to be having an issue with transcoders.  I'm transcoding between g.711ulaw and iLBC.  But I'm finding that the router is only allowing 4 sessions and 8 connections when I have max sessions set to 16.  

CCM-P-CUBE1a#sh sccp con
sess_id conn_id stype mode codec sport rport ripaddr conn_id_tx

34005855 33815157 xcode sendrecv ilbc 44134 18956 192.168.128.178
34005855 33815156 xcode sendrecv g711u 43960 43978 172.29.1.71
34005871 33815205 xcode sendrecv ilbc 44794 29726 192.168.30.100
34005871 33815204 xcode sendrecv g711u 44782 44798 172.29.1.71
34005869 33815200 xcode sendrecv g711u 44676 44328 172.29.1.71
34005869 33815199 xcode sendrecv ilbc 44696 22794 192.168.125.172
34005870 33815202 xcode sendrecv ilbc 44754 17952 192.168.30.117
34005870 33815201 xcode sendrecv g711u 44716 44678 172.29.1.71

Total number of active session(s) 4, and connection(s) 8

dspfarm profile 1 transcode  

 codec g729abr8

 codec g729ar8

 codec g711alaw

 codec g711ulaw

 codec isac

 codec ilbc

 maximum sessions 16

 associate application SCCP

dspfarm profile 1 transcode  

 codec g729abr8

 codec g729ar8

 codec g711alaw

 codec g711ulaw

 codec isac

 codec ilbc

 maximum sessions 16

 associate application SCCP

max streams is showing as 32

but when I make another call I get a fast busy and the call fails.  I never see more than 8 connections.

Do I have a config problem or something else?

DSP groups on slot 0/2 slot id 2

dsp 1:

  State: UP, firmware: 40.2.10

  Max signal/voice channel: 64/64

  Max credits: 960, Voice credits: 960, Video credits: 0

  num_of_sig_chnls_allocated: 23

  Transcoding channels allocated: 5

  Group: FLEX_GROUP_VOICE, complexity: FLEX

    Shared credits: 720, reserved credits: 0

    Signaling channels allocated: 23

    Voice channels allocated: 0

    Credits used (rounded-up): 0

  Group: FLEX_GROUP_XCODE, complexity: FLEX

    Shared credits: 0, reserved credits: 240

    Transcoding channels allocated: 5

    Credits used (rounded-up): 240

  Slot: 0/2

  Device idx: 0

  Dsp Type: SP2700 

dsp 2:

  State: UP, firmware: 40.2.10

  Max signal/voice channel: 64/64

  Max credits: 960, Voice credits: 960, Video credits: 0

  num_of_sig_chnls_allocated: 0

  Transcoding channels allocated: 11

  Group: FLEX_GROUP_VOICE, complexity: FLEX

    Shared credits: 432, reserved credits: 0

    Signaling channels allocated: 0

    Voice channels allocated: 0

    Credits used (rounded-up): 0

  Group: FLEX_GROUP_XCODE, complexity: FLEX

    Shared credits: 0, reserved credits: 528

    Transcoding channels allocated: 11

    Credits used (rounded-up): 528

  Slot: 0/2

  Device idx: 0

  Dsp Type: SP2700 

This is a 4331 router with PVDM4-128

[Jonathan Unger]

Hi There,

I would be interested to see how many streams are being advertised to CUCM for your dspfarm profile in the SCCP messaging.

Would you be able to do the following (if you can afford to take the dspfarm profile down for a few seconds):

1. Disable console logging on the CUBE (the following debug can generate a decent amount of output)
2. Enable "debug sccp event"
3. Shut down dspfarm profile 1, then no shut (careful this will drop calls using the transcoder)
4. Capture the debug output

You should see a line in the debug after you issued the "no shut" on the dspfarm profile, advertising how many streams the transcoder is capable of handling.

I pulled the following message off a 2911 with 4 sessions configured under the transcoder (dspfarm profile 1:
Nov 23 03:19:32.313: sym_xapp_new_rpm_profile_info: max_streams 8, prof_id 1, codec_cnt 7, iss 8, mspc 0, rsvp un-enabled, tls un-enabled

Can you check and see how many streams are being advertised by the ISR4K?

- Jon