[cisco-voip] using my DSPs on a 3845

[Ryan Ratliff]

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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