I have one Cisco 2811 router as a VoIP gateway between Telco and my CCM.
Currently, there's one ISDN PRI over 1-port T1/E1 Multiflex Voice/WAN Interface Card. There is PVDM2-32 module also and everything works fine so far.
Now I need to connect to CCM the four additional ISDN PRI interfaces from telco.
My question is can I achieve it on this router with:
1. adding two 2-port T1/E1 Multiflex Voice/WAN Interface Cards and
2. upgrading to two modules PVDM2-64 in total?
maybe should I go with a new router (which is less desired solution)?
In other words, would it be a problem to have 5 PRI interfaces with 2x PVDM2-64 modules in total on 2811 platform. Would it be enough?
I realized my mistake and corrected my reply.
The point is that if you don't have enough DSP, you cannot configure the PRI interface at all, so as I said either get a bigger router, or install an NM-HDV2-xx.
Hi, you cannot use only PVDM2 on 2811 for 5 x E1, because the the 2811 has only two PVDM2 slots, and you need 3.
5 x 30 = 150 channels, 2 PVDM2-64 makes only 128 channels.
So, eithjer replace the router with abigger one, or use the PVDM2 on borad in conjuction with an NM-HDV-xxx.
If you have service contract, you can use the online DSP calculator for this kind of things.