[cisco-voip] ISR Sizing Guide

[Gary Parker]

Morning all, I'm currently running a pair of 2921 ISRs with 4x E1 on 
each and a small number of voice SIP trunks using CUBE (we do video, 
too, but have epxressways for that). The 2921 series are EOL now and the 
Cisco Router Selector 
(https://www.cisco.com/c/dam/assets/prod/routers/cisco-router-selector/index.html#/branch) 
suggests replacing them with a 4331 ISR. The marketting video suggests 
this is a very powerful and capable piece of equipment, far moreso than 
my current needs demand, and I'd expect it had a price tag (and 
maintenance cost) to match!

I'm sure Cisco used to have a table somewhere for the 2900 series kit 
that simply and concisely showed you how many concurrent connections and 
DSP sessions each model could handle. Is there something similar for the 
4000 series, because I can't find it anywhere!

With two NIM slots and two RJ45 ethernet ports, from a connectivity 
perspective it looks like the 4321 would fit my needs so long as it runs 
CUBE. I just need to know what any limitations are for the platform 
regarding call capacity.

-- 
/-Gary Parker----------------------------------f--\
|     Unified Communications Service Manager      |
n      Loughborough University, IT Services       |
|     tel:+441509635635 sip:gary at lboro.ac.uk      o
|     http://delphium.lboro.ac.uk/pubkey.txt      |
\r----------------------------------------------d-/