2621 with 4 T1s

[thisisshanky]

Does any body know if a 2621XM can handle 4 Voice T1s (either CAS or PRI - dont cares)...The modules used are

NM-HDV2-T1/E1 - This module has 2 on board T1 ports and a VWIC slot.

The VWIC used is VWIC-2MFT-T1.

The above hardware should give me 4 T1s on my router. I will be using 2 PVDM2-64 DSPs, which would give me 128 channels of DSP. (4T1s will use only 96 channels at medium complexity)

I want to know if 2621 has enough horsepower to handle 4 T1s, if the memory is maxed out to 128 MB.

[c-charlebois]

I was about to say that you can't do that, but then I read about the NM-HDV2. That looks like one beatiful peice of hardware.

As for the 2621 having enough horsepower, I don't think that will be an issue. The DSP's are responible for the coding and decoding. By the time the T-1 hits the router CPU, it's packets, and not enough packets to be a problem for a 2600XM.

[thisisshanky]

Ok, that helps! But again looking at this document,

http://www.cisco.com/en/US/products/hw/routers/ps259/products_data_sheet09186a00801761b1.html

On this page, referring to table 3, 2610 through 2651 series router have a maximum voice call (simultaenous) density of 90 calls.

If I go for 4 T1 PRIs, my call density is 4 * 23 - 92

If I go for 4 T1 CAS, my call density is 4 * 24 - 96

So does the limitation of 90 calls mean that the 91st call will be dropped or the router wont let me configure more than 90 DS0s ?

Let me know if my question is not clear..

[c-charlebois]

I beleive that that maximium number of 90 is simply dependant on hardware and is changed with the NM-HDV2.

Prior to the NM-HDV2, the maximium voice channels that a 2600XM could support included a NM-HDV-2E1, which supported 60 channels, plus a AIM-ATM-VOICE-30, which when used with a VWIC-1E1, supported 30 more channels for a total of 90. I do not think the CPU/Memory of the router itself really comes into play. Otherwise, why would a 2651XM have the same limitation as a 2610XM.

This is not definititive. I could be wrong. This si just my interpretation of the docs.