Voice over IP

Topology is IP phones>Call control server>Cisco voice gateway (sip)> ISDN PRI to PSTN On some phone calls, not all, the digits passed in DTMF to the gateway is doubled. Digits dialed from phone is 300038. Gateways seems to get 330000003388.Anyone kno...

Hi, one of our customers has complained of intermittent issues with voice calls.  We provide the customer with WAN circuits and devices.   I have logged onto the routers on both ends  ASA1001 on our side and an 887VA on theirs.  I cannot see any pack...

We recently had our VoIP system upgraded to CUCM 10.5.2.11900-3We have 3 "receptionists" that have 7965 desk phone with a 7916 24-line side car attached. One of them also have a Plantronics W730 headset, this phone would not work after the upgrade.  ...

Performing an analysis after claim that the voice was robotic and poor quality, I found that removing the command "playout-delay mode fixed in the timestamps" within the dial-peer voice of my circuit the problem was normalized.I was in doubt, why rem...

Hi there, We are looking at upgrading our Cisco Meeting Place, APP and Web server from 8.5.3. to 8.6.2.Using the documentation here:http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/meetingplace/8_6/english/install_guide/86mpinst/upgrading_software_...

Hello, I work for a VoIP Provider and we generally manage the customer's business equipment (routers, switches, circuit termination). A customer decided he'd like to take his 7940 phone home and at home he's got a Comcast connection. The phone has SI...

Hello,What is the sip180 and sip183 and what problems may occur due to these parameters.I know sip180 is ringing and the 183 is the session progress and he carries the sdp.I am with this question because I do not know that troubleshooting should do i...

I have been able to use TCL IVR application to send a SIP SUBSCRIBE to a SIP proxy on an IMS for SIP registration events and see the proxy return a 200 OK followed by a NOTIFY using debug ccsip messages.  But so far I have been unable to get my TCL I...

Hello,I have some doubts on the issues below:I know that the Early Offer sends the sdp in the invite and the Late Offer sends the sdp in ack.Know the reliability PRACK adds a layer to a flow of another unreliably calls. how it really works and how to...

New to forum, if you are having Fax over IP (FoIP) issues, take a moment to contact me for help, and if I don’t have the answers, I will find them for you.25 years in the fax only industry.Randyhttp://www.faxsipit.com

What is Cat5e cabling? Could I use it for my restaurant business.http://telephoneguru.net/telecom/

Hi All Can anyone please suggest me how to create 13 different queues (containig agents) using GET DIGIT STRING, as technically we can create only 12 queues if we go with the MENU Parameter ? I tried to make one but I am unable to use 13 different qu...

Hello everyone,I really need your help.I do not really know myself voip .I have a 7800 series CUCM version 8.6.2.2A CME 3900 , Release 15.2 (4) M3.I have an E1 card for calls to the PSTN .for my test I configured a rule translation. incoming calls, a...

  Hi All,We have purchased and setup DX 650 collaboration phones, video is working a treat however when you try and conference in a another video call it fails.Does this phone offer ad-hoc video conferencing as a feature? If so how is it configured. ...