SRST works as far as phones failing over, registering with 2621, and being able to dial 9 and get dial-tone from one of the FXO lines. Is it possible for CallManager to route calls to this site through PSTN when the WAN link fails? Central Site has 2 PRI circuits on a 6009 for outbound/inbound calls.
Could you elaborate a bit? I had looked into this, but Cisco's documentation on this one is a bit light. The AAR config is just an alternate prefix digit. Do I need AAR plus a set of translation patterns to get the call out to my remote PSTN line? Additionally, I can only find AAR Group settings on individual lines. Is there a way to apply this to a broader scope?
I just noticed you said "when the wan link fails" I was thinking when the wan is low on bw. AAR will not work for a WAN failure. There is no automatic way to fallback to the pstn in the case of a wan failure.
The way AAR works is that if the bandwidth reservation fails, AAR is invoked and looks at the source AAR group and the destination AAR group. It sees what digits needs to be prepended, and then automatically places the call again using the new number.
You usually create 1 aar group for every physical location. Then, for each AAR group, you define what digits you need to prefix in order to reach the other AAR groups over the pstn. This is usually 9+1+area code+office code (assuming 4 digit extensions).
If your IP phones have a External Phone number mask defined on the line, then this is automatically prepended, so you may just need to prepend 9+1 for all of your locations.
SRST works perfeclty with DID nubmers at the remote branches. In the event of wan failure they can still receive and place calls. Depending on how many people are at these locations you may want to look at adding DID for them. Just a thought.
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...