I currently have one incoming T1 based NI2 PRI which terminates into an Adtran Atlas which then generates two network-side PRIs. The Atlas routes incoming calls between the two network-side PRIs based on DID numbers. I want to remove the Atlas from service and move this functionality to my 2821 router. My 2821 has the VWICs to do this but no DSP modules and I'm hung up on what I really need re DSPs. Since I currently don't want any call to end terminate on the 2821, do I need DSPs modules? All PRI switching configuration examples I've read involve some sort of VoIP operation which I don't need to deal with right now.
...Some two-port T1 or E1
VWICs can provide drop-and-insert multiplexing services with integrated
DSU/CSUs. For example, when used with a digital T1 packet voice trunk
network module, drop-and-insert allows 64-kbps DS0 channels to be taken
from one T1 and digitally cross-connected to 64-kbps DS0 channels on
another T1. Drop and insert, sometimes called time-division multiplex
(TDM) cross-connect, uses circuit switching rather than the digital
signal processors (DSPs) that VoIP technology employs.
What you appear to be asking is for the router to make the route decision after evaluating the Q.931 ISDN SETUP PDU which specifies the DNIS. As far as I know, this will require PDVMs and a call agent (i.e. dial peers).
a) The drop and insert feature (as far as I can tell) is only for hard wiring fixed T1 DS0 channels and not dynamic PRI B channels.
b) Your description of evaluating the PRI D channel Q.931 info (for "Called Party number") is accurate.
c) When I had used the DSP calcluator, it seemed to focus on codec selections assuming VoIP applications not pure "passthrough" of whatever is coming in on the B channel - which in my instance could be a voice call, modem or fax call or an end-to-end 64k ISDN call.
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...
If you have 2 ISR routers, one acting as Failover, do we need to have both the same number of SRST licenses on the 2 routers?
No. You will only need the SRST licenses on the primary router. Because this feature...