IP Telephony and Phones

Hi All,We have planned to restart the Cisco Call Manager Service in the Cluster. While we restart the call manager service IP Phone to IP Phone Calls & MGCP Calls will be preserved .What happen to the call in the below scneario's1) Active Calls via S...

I have a question about our ASA though if anyone can answer it. We have  to move from an ASA 5510 to a 5520 due to the 100 UC proxy-phone license  limitation on the 5510 (even though we have only 70 proxy phones deployed it appears that a UC license ...

Hello,I have a problem with a small IP telephony system (sip) and i'm using a cisco 881 router as router/firewall.The problem is that sometimes you can not call in. It happens only occasionally and when it does our ip phone provider says that there i...

Hi,I am trying to forward a hunt pillot when No answer/Busy to voicemail pilot where it would hit a Call handler with the same extn as the hunt pilot.But the greeting played is standard greeting when it hits the Call Handler. Why is it not hitting th...

hi all,I want to do VoIP , with cisco 2951 router with cme 9.0. I just want to know can i connect differnt branch  ip phone in differnt subnet in single centralized cme router 2951.that is for differnt branch ip phone there is differnt dhcp pool and ...

Existing voice subnet is 255.255.255.192 using IP range 10.96.71.65 - 126.  (65-70 static for Call Manager, Unity, etc. with 71 -126 DHCP for phones).Simply want to change subnet to 255.255.255.128 to give me IP range of 10.96.71.1-126.  Plan on keep...

On my UCS R210 I have a health status warning:Battery Status : LearningIt has been in this state for a couple days without recovering.  Is this a real problem?  What causes this to happen?  How do I recover?

Just wondering if anyone has seen external scam calls (Airmiles, banks, cruises, etc) showing up as a call coming from an individual inside the company? I'm not sure if I understand how this could be possible unless a scam call reaches an internal nu...

I have a client with just one (reported) phone that can't retrieve parked calls.  LAN-to-LAN Park works ok but calls that come in on the PRI and get parked by this one particular hone can't be retrieved by it.  Upon the retrieval attempt, the IP phon...

Is there a list of 3rd party SIP phones that have been validated to work with CUCM (version 8.6+) please?             

I need a fresh set of eyes to take a look at my configuration as I have neem fighting this all day to no success.Here is my hardware design:Internet, PC, printing etc works great.  Even my iPad gets a DHCP address from the DHCP server via a wifi rout...