IP Telephony and Phones

We've had several instances recently, where 78xx & 88xx come up with Registration Rejected after moving to a different subnet. If we delete the security certificate on the phone, the phone then registers fine at its new location. Any thoughts on what...

I am wondering if it is possible for our Call Manager 8.6 to be able to register with our SIP provider, or do we need to have CUBE in between them?

Hi I am in the middle of deploying Expressway C and Expressway E for a customer and have just hit the certificates minefield. My background is UC and have little to no security experience.I have a Windows 2008 server acting as a DNS server at the min...

I have an end-user that is trying to place a call to the 239 area code (Fort Myers, Florida). For some reason that area code is included in a route filter that blocks calls (presumably to avoid scams / toll charges) and will not go through. Is there ...

Hi.We have some calls disconnected during the conversation. These failures happen random on different phones and users several times a day.The phones are SIP Ip communicators.We have CUCM cluster10.13.81.6(pub)10.13.81.7(sub1 - the server was shut do...

Hi Everyone, Running CUCM 9.1. I 'm tryng to block all internal call from a specific Phone's Line (not all Phone's Lines) but the call look like is first hitting the Phone's CSS intead of the Phone's Line CSS, so that make not sense at all. Have two ...

Hello,I have a CUCM, and a SIP Trunk with Avaya. All the calls are done by this SIP Trunk, and it is working normally.I have one ATA (Audio Code), that is connected in a Device Fax.Please, I would like to know if is possible to send a Fax with this A...

Good Morning,I'm pretty sure my issue is with the telco, but I wanted to see if there is anything else I should be debugging/checking also.A site has an 1861 with 3 POTS lines. For the past few weeks, they have been missing calls at their site. When ...

Hi,The dialer sends an empty externtal number mask field to the GW. I would like to translate what I am receiving from the dialer (which is nothing) to 1888-234-12345. I am trying:Voice translation-rule 100rule 1 /^$/ /18881231234/Router#test voice t...