transcoder and conference shutdown

[Mike Buyarski]

for some reason I cant add the maximum sessions command under the trancoder and conference configs. which means I can't get those parts to not be shutdown. I included the scrubbed running conf and diag showing the PVDM hardware. Any thoughts?

[pkinane]

You are eating up all of the DSPs with the circuit:

controller T1 0/0/0
 cablelength long 0db
 pri-group timeslots 1-24 service mgcp

If you don't need all the channels you have configured, you can move away from the "timeslots 1-24" and do a fractional circuit. Otherwise, you will need to get another pvdm.

Also, depending on what your requirements are, you can try to use the transcoder to support the conference resource when needed (rather than doing g729 on the conference resource) and you can limit the flavors of g729 on the transcoder (unless you are actually using g729a/g729b/g729ab)

dspfarm profile 1 transcode
 codec g729r8
 codec g711ulaw
 associate application SCCP
 shutdown
!
dspfarm profile 2 conference
 codec g711ulaw
 associate application SCCP
 shutdown

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[Mike Buyarski]

ok so I removed pretty much all the codecs from the transcoders and conference.

dspfarm profile 1 transcode
 codec g711ulaw
 codec g729r8
 associate application SCCP
 shutdown
!
dspfarm profile 2 conference
 codec g711ulaw
 associate application SCCP
 shutdown
!

but I still cant add the maximum sessions. since the pri is not going to be max out even remotely its not like we would not have enough DSP resources.

[pkinane]

But when you put in the timeslots command it carves out how many DSPs it needs (it doesn't wait for the time when it actually uses them).

What do you see when you type the command "max sess ?"?

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[Mike Buyarski]

see attached

[pkinane]

It says 0-0 meaning you have no DSP resources available based on what you have configured in your IOS. I am doing just about the same thing as you, just with more DSP resources:

rtp12-pkinane-SJ#show run | sec voice-card|controller|Serial|conference
voice-card 0
 dspfarm
 dsp services dspfarm
controller T1 0/2/0
 pri-group timeslots 1-24 service mgcp
interface Serial0/2/0:23
 no ip address
 encapsulation hdlc
 isdn switch-type primary-ni
 isdn incoming-voice voice
 isdn bind-l3 ccm-manager
 no cdp enable
dspfarm profile 1 conference
 codec g711alaw
 codec g711ulaw
 codec g729r8
 maximum sessions 2
 associate application SCCP
rtp12-pkinane-SJ#
rtp12-pkinane-SJ#
rtp12-pkinane-SJ#
rtp12-pkinane-SJ#show diag | i PVDM
        PVDM Slot 0:
        64-channel (G.711) Voice/Fax PVDMII DSP SIMM PVDM daughter card
        Product (FRU) Number     : PVDM2-64
rtp12-pkinane-SJ#

If you don't need to have a full PRI you can move it to a fractional PRI: http://www.techexams.net/forums/ccnp-voice/72520-fractional-pri-config.html

There is a hook, you are using MGCP and fractional PRIs are not supported with MGCP.

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[Mike Buyarski]

sounds to me the simplest option is to add a PVDM3-16 to cover the transcoders and conference. does this also mean I have to dsp for the 4-fxs ports? we have on the router.

[Jaime Valencia]

A PVDM3-16 won't get you any far if you want XCODER and CFB, plus FXS.

Just using the FXS, assuming you use G.711, will get the count down to 12 channels. And depending on the codecs, and number of participants for conference, you might get 1 session.

You really should be using the DSP calculator to find out what resources you need for your environment.

[pkinane]

+5

[Mike Buyarski]

No I did not use the DSP calculator, I'm checking that out though) in fact it was mostly because we went to our partner and told them what we needed. what I am specifically looking at is either 3 fxs ports used or 2 fxs and 1 fxo port.(not sure on what the paging system will use yet). As for maximum sessions I only ever go with "1" since they are not something we need much at all. however we absolutely need the fxs and/or the fxo port.