IP Telephony and Phones

Hello,Since migrating to Webex we are experiencing one-way audio issues on some calls (not all) after the callee puts an external caller on hold and resumes the call. Then the callee can't hear the caller but the caller can hear the callee fine.We st...

HiI have bought a Cisco 8841 model IP Phone and im not able to register the Phone

Hi, we configured for our customer some 8961 ip phones with 3cx. We created the required templates and the calls are working fine. The problem occur when someone wants to forward a call. The phone sends the following message: REFER sip:x.x.x.x SIP/2....

I am trying to integrate my local gateway with the webex, however the gateway is not registering :Sip debug shows that registration is not authorized:your help will be appriciated.show and debug outputs are attached: 

I'm currently working with CUCM version 12.5 and a phone could be on and making call last week but after the phone disconnects from network it doesn't show the "last registered status" or "last active" status in the CUCM. It show like it was never re...

SALUT A TOUSJ'AI UNE PREOCUPATIONJE SOUHAITE CONNECTER LE CUCM 12.5 AU YEASTAR S300 AFIN DE  CONFIGURER UN TRUNK SIP

can firmware be downgraded on cisco IP phone in Webex control hub? We are experiencing a critical issue with our Cisco desk phones. Multiple users have reported that their phones are rebooting randomly in the middle of calls I have confirmed the issu...

Hello people, We want when a user call a customer to PSTN from their jabber or ip-phone, and the customer answer the call, to hear a recording message that will inform him that this call will be recorded. Do you know how this can be achive? It is cal...