IP Telephony and Phones

DearsI've an ISR 2921 with 3 FXO modules and two PVDM3 installed, the problem that the router stills not detecting any FXO module also i can't do any voice configurationduring booting from logs i can see that the router detects two PVDM3 installed bu...

I have a maintenance person using a CP8821 that was supplied Sept 5 of this year.  It worked great for a while, now you can barely hear someone when they are talking to you - the person on the other end can hear fine.  Is there a way to turn the volu...

We are using CUCM 10.5.2 and have SIP trunks.  I have been fighting a problem where I have phones that are sending out a toll free number as their ani by putting the TFN in the "External Phone Number Mask" on the line page for the phones that need th...

Our Cisco IP Phones (7965) are unable to download firmware from CUCM.  During the boot process, the phones error out with "error", and continue to loop.  Apparently, this started to occur after we added an SD-WAN appliance (which replaced the locatio...

I've a cucm linked to H323 Gateway, with an E1 link to PSTN and 100 PSTN numbers.whenever i want to call outside my corporate the call is intiated via the first PSTN number only (even if i tried the whole 100 number, they always go out through this P...

anyone have a link that can share for a bootable imagei need 11.5.1.15900-18 unrestricted ThanksAmer

Hello, I have a question regarding SIP Trunks and if they are full. I understand the behaviour is that the call fails, but what other options do we have? Can we overflow the calls to another SIP Trunk or play a message and then drop the call? Any ide...

hi dear friends, we have some 7911 phones with SCCP registering,when we create Jabber windows and Integrate that with 7911 sccp phone,the 7911 phone cant control jabber windows desktop, because we want do dial in jabber, then phone dial number for us...

Hello,              We are having a strange problem we installed a new Cisco C9200 switch to replace a bad 3560. Everything worked fine on old switch and everything is on new switch except one thing. We have Cisco 7941 ,7911, and 7906 phones that are...

Hi,I have one CUBE  with IOS XE 16.12.5 with one SIP Trunk to PSTN with Redundant links.When primary link goes down only incoming calls from PSTN are failing because CUBE as soon receives INVITE reply with SIP/2.0 488 Not Acceptable Media.I have disc...

Hi, We replaced one of our 8851 unit running software version 12.8.1, now the replacement phone doesn't display the information on the side bar a 8800 expansion module correctly for some reason like the other phones running the same version software....

Hello, My client is not able to receive inbound calls. At the logs i see this messages: %VOICE_IEC-3-GW: H323: Internal Error (OLC ACK T103 timeout): IEC=1.1.183.5.70.0 on callID 1049 GUID=9E30499FED2711E68725C44860A6B7E8*Feb 8 11:22:03.253: %VOICE_...

Hi, I have a number of remote Cisco VoIP sites that I support and was wondering if there is a routine maintenance guide/checklist that people may follow when checking servers at remote sites?  Just putting something together and thought there may alr...

hi Team, we are using 7821 series phones, and on the phone there is a New Softkey "Recents" this key doesn't appear in Softkey configurations layout so can't be removed. While doing some search found that it is a Bug. https://tools.cisco.com/quickvie...