[cisco-voip] using my DSPs on a 3845

[Lelio Fulgenzi]

OK - now I'm worried.....

kc-vgw(config)#dspfarm profile 105 conference
kc-vgw(config-dspfarm-profile)#maximum sessions ?
  <0-0>  Number of sessions assigned to this profile


This doesn't seem to make sense to me.

When I ran/run the DSP calc (see below), it says I that one PVDM64 should suffice (using the optimized result). When I tried adding the CLI suggestion, I'm pretty sure it didn't make any difference in the show running, which I was told because it was the default.

      Optimal Results  
      voice-card 0  
             codec complexity flex  
       
      What I have:

      voice-card 0
       no dspfarm
      !



     


------------------------------------------------------------------------------

        DSP Requirements 
        
                Onboard CLI Information 

------------------------------------------------------------------
              Optimized Result(Default) 
------------------------------------------------------------------
              3 DSP(s). 
              one PVDM2-48 

              or 
              one PVDM2-16 + one PVDM2-32  CLI Info 

------------------------------------------------------------------
              Normal Result 
------------------------------------------------------------------
              6 DSP(s). 
              one PVDM2-32 + one PVDM2-64 

              or 
              two PVDM2-48 

              or 
              three PVDM2-32  CLI Info 

------------------------------------------------------------------
              Worst Case Result 
------------------------------------------------------------------
              N/A  
------------------------------------------------------------------
              N/A 
       


------------------------------------------------------------------------------

  ----- Original Message ----- 
  From: Ryan Ratliff 
  To: Lelio Fulgenzi 
  Cc: Cisco VoIPoE List 
  Sent: Friday, January 25, 2008 3:24 PM
  Subject: Re: [cisco-voip] using my DSPs on a 3845


  It gets a little murky with the flex DSPs and how many are required depend on what voice codecs are being used.


  Your best bet is to configure a sccp profile for either conference or transcode.  See what the 'max-sessions' command will allow you to set.  If you have enough free DSPs then when you do 'max-sess ?' the result will include a non-zero number, ie '0-10' or similar instead of '0-0'.


  Yes you do need to add a CFB in CM with a name that matches whatever you set in the 'register' command under the sccp profile on the router.


  -Ryan



  On Jan 25, 2008, at 3:20 PM, Lelio Fulgenzi wrote:


  I've got a 3845 with a PVDM2-64 as far as I can tell. Well, that's what I ordered and I trust Cisco! A "show voice dsp" shows the following:
    DSP   DSP              DSPWARE CURR  BOOT                         PAK   TX/RX
    TYPE  NUM CH CODEC     VERSION STATE STATE   RST AI VOICEPORT TS ABRT PACK COUNT
    ===== === == ========= ======= ===== ======= === == ========= == ==== ============
    C5510 001 01 g711ulaw    9.2.2 busy  idle      0  0 0/0/0:23  23    0  11621/11516
    C5510 001 02 g711ulaw    9.2.2 busy  idle      0  0 0/1/0:23  22    0  63104/64754
    C5510 001 03 g711ulaw    9.2.2 busy  idle      0  0 0/0/0:23  07    0    4906/4634
    C5510 001 04 None        9.2.2 idle  idle      0  0                 0          0/0
    <snip>
    C5510 004 15 None        9.2.2 idle  idle      0  0                 0          0/0
    C5510 004 16 None        9.2.2 idle  idle      0  0                 0          0/0
    ------------------------END OF FLEX VOICE CARD 0 ----------------------------
  I gather that each DSP can handle 16 voice calls, so if I have two T1s = 23 calls * 2 (each has their own Dchannel)=46 calls / 16 = 2.875.

  So that means three DSPs are required to handle my voice calls and I have one left for conferencing.

  Do I just create a DSP farm with one DSP and somehow assign it as a conference resource in Call Manager?

  Lelio
  --------------------------------------------------------------------------------
  Lelio Fulgenzi, B.A.
  Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
  (519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
  "Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo."      WJR

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