IP Telephony and Phones

Hi, I have a customer to complain the CallManager always cannot capture the Trace Logs for the TAC troubleshooting. It is because it was overtime to capture the logs. The User-A opened a helpdesk case about his IP-Phone on 3:00pm today and claimed hi...

CM 11.5, our set up is PC's piggyback into 8851 phones in our campus environment.  We have users who remote desktop into their machines remotely and complain that their access is a problem an issue out of hours.  They claim it is our Energy saving se...

Hi guys,I have a problem to make work call-forwarding on my IP Phones Cisco 7942 model. When an external phone (PSTN) calls on an IP phone of the company (where forwarding to an external US national number is setted), the forwarding is not possible a...

Hi,i have model 8945 with default firmware version sccp 9-3-1-19 and upgraded this model inside call manager to the latest version  SCCP894x.9-4-2SR3-1. the problem is when i connect new 8945  to register into call manager it is hanged up .i tried to...

Do anyone knows what is the purpose of configuring backhaul on MGCP.. I understand when MGCP-PRI backhaul interface is configured , q921 will be terminated on the MGCP gateway and q931 signal will be sent to CCM . But what i don't get is whats the ...

i have cucm 12.5 and voice routers with 16.10.2as you know when i add mgcp gateways in the cucm it shows "not trusted" , i need to make the traffic between the mgcp routers and the cucm pub+subscribers secure , some people suggested creating ipsec tu...

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...