Unified Communications Infrastructure

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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 -----...

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 Level 1
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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 Level 3
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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...