Unified Communications Infrastructure

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Forum Posts

SIP 2.0 : 403 Forbidden, cause code 21 in voice gateway for certain calls

Hi All While calling certain external numbers, the calls get rejected on the voice gateway (ISR 4400 series) with cause code 21. At the same time few calls go through successfully. Below is the call flow. SFB call control ---> SIP voice gateway -----...

Resolved! External calls not to going to voicemail when unanswered, forward to standard cisco greeting instead.

Hi, i have one particular user who this effects. Everything seems to be set up correctly in the Call Manager and Unity. Internal calls DO go to voicemail, but external calls are routed to the standard cisco greeting, with no option to leave a voicema...

mfaccin by Beginner
  • 493 Views
  • 7 replies
  • 0 Helpful votes

7962 New LSC or Old LSC

We have a number of 7962 phones that have a new LSC on them as issued by a new CAPF certificate on the server.  However, there are an unknown quantity of phones that don't have this new LSC on them yet and we have no way of knowing which phones are w...

refram by Participant
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  • 0 replies
  • 0 Helpful votes

Resolved! 9.1 to 12.5 PCD migration where CUCM and CUPS OS admin usernames are different

I am tasked with migrating a Unity cluster and CUCM cluster from 9.1 to 12.5 utilizing PCD. Upon cluster discovery the CUCM nodes are seen without issue but the CUPS nodes are failing as the OS admin username is different than the one specified in di...

Configuring Trunk

Hi Guys, I'm new in this CUCM stuff. I was asked configure trunk between 2 countries CUCM. May I know for this case, do I need to create intercluster trunk or SIP trunk? Is there a document where I can know how to configure this as well as a step by ...