IP Telephony and Phones

I know there have been many similar threads,and I have tried my best to piece together information from those, but I think I must still be missing some key details.   I have a Cisco CP-8845 phone that I'm trying to just get registered to an Asterisk ...

Hi everyone,We have a client with CUCM12.5-->VGW MGCP-->ITSP.We configure a RDP-SNR on a phone 8851.When someone calls the phone that activate RDP-SNR the phone ringing and also his cell phone, we would like to see on the cell phone the calling id of...

My phones are not dialing the correct number for a DN. If dialing 100, which is for say the front lobby, all the phones actually dial 400 which is the galley. I've tried to look at the dialed number analyser and it's showing if I dial 100, from a cer...

Hi everyone! I was trying to register my CP-7841 and CP-8841 series IP Phones to my Cisco ISR 4321 but unfortunately cannot register because of the ephone type 7841 is not appearing from the list.  Btw. my current ios version for ISR 4321 is Cisco IO...

I recently found out that since the conversion of a site from T-1 CAS PSTN connections to SIP over a year ago, that faxing has been intermittently not working. At the trouble site, all fax machines are off of a PBX, which is T-1 CAS integrated to SBC...

I configured a new 7841 template with Do No Disturb for my customer. I noticed some of the subscribers also had Jabber. The question hasn't come up yet, but I wonder how is DND enabled on Jabber? I haven't seen anything yet on our version 14.3.1.

I am able to create the license and add the phone to Control Hu and convert it to 3PCCI remove the phone from Control Hub, it resets.I configure for Zoom.It reboots a few times and looks to register (i can see the extension and name of the phone)I ge...

I do not get Cisco option in MTR device, when i click on the Join the meeting from Cisco CVI link.I get this screen attached, i can see Teams & Zoom option but Cisco option is not available.This is related to Cisco CVI trying to join external Cisco C...

New cisco Devices some of them not Negotiating 1 Gig new cat 6 Infrastructure new Cisco 9200 48nport Switches 

Hi, We have the following scenario: Telco -> Cisco VGW -> CUCM (Imagicle Auto Attendant) -> forward to a mobile number. During the call, once option 2 is selected (which forwards us to the mobile number), the call drops. On the call trace, the reinvi...

HI there! I'm having some issues with my media with CUCM.   I'm using a 2901 as my gateway/CUBE. --Whenever someone calls in, they hear the initial announcement from the Hunt group, but while the call is ringing they hear silence.  Once the call is c...

If I place a call from Jabber on my cell phone registered via Expressway and I then call an internal number that has a remote destination profile, the call to the cell succeeds if the remote destination phone # is on T-Mobile, Verizon, Google Voice o...

IP 8821 phone "network busy"  no incoming no outgoing callsfirmware: sip8821.11-0-5-17wifi Cisco AIR-CAP2602I-A-K9Sip debug shows .....H.\SIP/2.0 400 Bad RequestVia: SIP/2.0/TCP 10.6.9.16:5060;branch=z9hG4bK2182cc59From: "1105" <sip:1105@10.6.9.16>;t...