We are in the process of migrating from standalone PBXs to centralized UC. We have several of our remote locations converted and looking to tackle our corporate location. One question we have not been able to research and answer is the number of PRIs that can be supported by a 2911, 2921 or 4300 router. We have a single PRI terminated on 2900s at our remote locations but here at corporate our existing PBX has three PRIs attached. We can find things about the type of VWIC cards and we do use the 4-port at our remote locations but with only one PRI attached. We can find nothing about a maximum number or anything similar. Can anyone provide or point us in the direction for a data sheet that has thins information?
Along the same lines anything on configuring multiple PRIs on a single router? I have come across a reference about a PRI-Group but still researching.
Going by the calculator, it is recommending a PVDM3-128. This is without any transcoding, CFB, DSP sharing, secure voice etc and for 72 Low Complexity codec calls aka G711ulaw. But you can go with a PVDM3-64 and a PVDM3-16 just fine IMHO.
Well, it is 72 DSP resource for a 24 channel PRI (like what is used in the US).
It is 93 DSP resources for a 31 channel PRI (like what is used in most of the reset of the world).