[cisco-voip] PVDMs, DSP farms, et al.... next steps?

[Erick Wellnitz]

In my experience I have never been able to 'oversubscribe' DSP resources so
that is true.  I believe, and someone please correct me if I am off on
this, DSPs are 'reserved' when the T1/PRI interface is turned up.  So, if
you had an interface configured as a 'hot' standby in case your primary PRI
port goes bad, it would use DSP resources.

Think of the consequences of being able to do overprovision.  If you have
conferencing, MTP, transcoding and 8 PRIs configured and all of your DSPs
are in use for conference and MTP, you are going to be in trouble when
people start complaining they can't make or receive calls to/from the PSTN.



On Wed, Apr 25, 2012 at 8:51 AM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:

>  Thanks for this. A couple of more questions:
>
> I read that you have to have enough DSP resources for all your voice ports
> (T1s in particular) and you can't overprovision. Just wondering the
> validity of this statement (from NetPro post) and whether this is for cards
> that are inserted, or turned up.
>
> Also, with respect to codecs, can you configure different codecs on the
> same DSP? It talks about FLEX for the PVDMs, and I'm just wondering if
> that's the best approach.
>
> Thanks again for everyone's help.
>
> Lelio
>
>
> ---
> Lelio Fulgenzi, B.A.
> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
> (519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> Cooking with unix is easy. You just sed it and forget it.
>                               - LFJ (with apologies to Mr. Popeil)
>
>
> ------------------------------
> *From: *"ccieid1ot" <ccieid1ot at gmail.com>
> *To: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
> *Cc: *"cisco-voip voyp list" <cisco-voip at puck.nether.net>
> *Sent: *Tuesday, April 24, 2012 6:38:47 PM
> *Subject: *Re: [cisco-voip] PVDMs, DSP farms, et al.... next steps?
>
> *can i go without it? do i need it for conferencing/xcoding/MTP?*
> No, Yes
>
> *when enabling dsp farm'ing, i can see a couple of examples which state
> "voice-card 0" what is this voice-card 0? is this the motherboard? is this
> the DSP chip itself?*
> PVDM2/3 modules installed in the slot on the motherboard.
>
> *if i install another DSP chip, would I see "voice-card 1"  *
> If you insert a NM-HDV2 in slot 1, that would be configured as "voice-card
> 1".  Answer is no.
>
>
>
>
> On Tue, Apr 24, 2012 at 3:16 PM, Lelio Fulgenzi <lelio at uoguelph.ca> wrote:
>
>>  ok, that last document didn't help much either.
>>
>> so here's a couple of general questions:
>>
>> where/when do i need dsp farm'ing? can i go without it? do i need it for
>> conferencing/xcoding/MTP?
>>
>> when enabling dsp farm'ing, i can see a couple of examples which state
>> "voice-card 0" what is this voice-card 0? is this the motherboard? is this
>> the DSP chip itself? if i install another DSP chip, would I see "voice-card
>> 1"
>>
>> thanks everyone!
>>
>>
>> ---
>> Lelio Fulgenzi, B.A.
>> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
>> (519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> Cooking with unix is easy. You just sed it and forget it.
>>                               - LFJ (with apologies to Mr. Popeil)
>>
>>
>> ------------------------------
>> *From: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
>> *To: *"cisco-voip voyp list" <cisco-voip at puck.nether.net>
>> *Sent: *Tuesday, April 24, 2012 4:55:29 PM
>> *Subject: *Re: PVDMs, DSP farms, et al.... next steps?
>>
>>
>> well, i read the first two docs i mentioned, and, i'm not too further
>> along. looks like there's one more i should look at:
>>
>>
>> http://www.cisco.com/en/US/customer/docs/routers/access/1900/software/configuration/guide/pvdm3_config_ps10538_TSD_Products_Configuration_Guide_Chapter.html
>>
>> hopefully this one will help.
>>
>> ---
>> Lelio Fulgenzi, B.A.
>> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
>> (519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> Cooking with unix is easy. You just sed it and forget it.
>>                               - LFJ (with apologies to Mr. Popeil)
>>
>>
>> ------------------------------
>> *From: *"Lelio Fulgenzi" <lelio at uoguelph.ca>
>> *To: *"cisco-voip voyp list" <cisco-voip at puck.nether.net>
>> *Sent: *Tuesday, April 24, 2012 1:26:55 PM
>> *Subject: *PVDMs, DSP farms, et al.... next steps?
>>
>> Hi all,
>>
>> I'm in the process of migrating from 6608s to 3945s. I've got all the
>> pieces and I'm just wondering about next steps.
>>
>> I've found the following documents:
>>
>> http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/7x/media.pdf
>>
>>
>> http://www.cisco.com/en/US/docs/ios-xml/ios/voice/cminterop/configuration/15-1mt/vc-enh-confr-vgr.pdf
>>
>> But I'm wondering if there are any others people can recommend.
>>
>> Also, if there are any hints or recommendations on going forward, that
>> too would help.
>>
>> I'll have two 3945s, each with a PVDM-256 installed that I need to use
>> for 8 T1s into each router, and for conferencing mainly. But I'll also want
>> to try and do some transcoding if possible.
>>
>> Thanks, Lelio
>>
>>
>>
>>
>> ---
>> Lelio Fulgenzi, B.A.
>> Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
>> (519) 824-4120 x56354 (519) 767-1060 FAX (ANNU)
>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> Cooking with unix is easy. You just sed it and forget it.
>>                               - LFJ (with apologies to Mr. Popeil)
>>
>>
>>
>> _______________________________________________
>> cisco-voip mailing list
>> cisco-voip at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-voip
>>
>>
>
>
> --
> duy
> CCIE #27737 Voice
>
>
> _______________________________________________
> cisco-voip mailing list
> cisco-voip at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-voip
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://puck.nether.net/pipermail/cisco-voip/attachments/20120425/721848e5/attachment.html>