IP Telephony and Phones

I have attached a screenshot of Cisco RTMT that shows the calls.  We receive calls that are labelled as "911", however, there is no answer.  More than likely it's a spoofed call, however, has anyone else run into this and if so, how did you remedy th...

Hi!   I'm upgrading a UC environment from 11.0 to 11.5. One of the pre-upgrade tasks is to ensure the subnet mask is in the recommended format for /24.   "If you are using a 24-bit IP subnet mask, ensure that you use the following format:255.255.255....

I have set up a SIP trunk from my  3rd party PBX to my IOS 12 voice gateway which in turn forwards calls to CUCM. Calls from phones registered on CUCM are working fine, however calls from PBX to CUCM via the router do not go through. The phone keeps ...

Hi all, I have noticed in recent years Cisco is migrating away from SCCP and H323 and doing everything via SIP protocol. While I have not used the gatekeeper functionality personally yet, I have seen it implemented in other deployments, for inter-sit...

Hi All,Am trying to install the SSL certificate on CUCM 8.6 to avoid the Web Security error while logging to UCM Admin & User page.With the reference of below link we sent the CSR to CA get the Certificate.http://www.cisco.com/en/US/products/sw/voice...

Good morning,I am attempting to figure out how to use a SBC to rewrite a SIP Invite and extract the Presence Information Data Format PIDF-Location Object (PIDF-LO) and rewrite it in a standard Automatic Location Information (ALI) format.The PIDF-LO i...

Hi all. I have a client who is complaining about a loud crackling noise whenever they try to make a call. The noise stops as soon as the person on the other end answers the call and the actual conversation starts between the two parties. So the probl...

Hi all,Recently I witnessed a DHCP flood on a network which was started by a 7942 Phone (firmware v. sccp42.9-3-1). After power-cycling the phone the DHCP Flood stopped and didn't happen again. I am more interested in understanding the log message th...

 I am now at the point that i created my own config file (SEP005F86914C39.cnf.xml) but it has trouble verifing it can someone please help where I am going wrong. I got the text from HEREI'd like to connect to skype connect here is the values they gav...

Hi,I have cucm and uccx 11.5 configured ,integrated and deployed. We have contact center working fine and now i want to configure another contact center for other agency. I can call that trigger number internally and works fine, but when called from ...