IP Telephony and Phones

Hi, I need to modify the "From" field in the SIP-Header. The original Sent SIP Header look like this: _________________________________________________________________________ Sent:INVITE sip:0408545545@10.15.165.102:5060 SIP/2.0Via: SIP/2.0/UDP 10...

Hi, I have a problem with Microsoft Teams Direct Routing. I have a cube cisco 4331 as SBC on premises , but when  I try to make calls to PSTN  I can´t. I receive calls from PSTN without problems. I have this messages in the logs (cube): SIP/2.0 488 N...

Does somebody know WHY is mentioned everywhere (CCO, networkers,etc) that UDS home cluster discovery requires ILS, WHEN UDS home cluster discovery DOES NOT requires ILS to be even operational. Thank Alex

Hello community! I have a CP-8851 phone with 5 lines. I am responsible for 2 of the 5 lines. I would like to silence the ring of incoming calls for the 3 lines for which I am not responsible (to help me focus). I do not want to change the ringtone or...

Does anyone know if it is possible to set the default background image from CME, so I dont have to go to every phone and manually select the background image? Maybe a service phone setting within telephony-service section I can distribute images no p...

Hey all,Relatively new to IP phones here. I setting several Cisco 8865's for our small office for use with Zoom Phone. I purchased a few refurbished models, all of which have 2015 firmware (the old blue interface). When following Zoom's provisioning ...

Like the title says, we bought twenty 8851 phones about 2 years ago, and in the last 12 months, 4 of them have "died" - the phone will reboot mid-call, and when it comes back, none of the physical buttons work except for the receiver button (picking ...

I want to configure text and the audio alert to the IP phone which are registered on Webex. Also do I need to set up any server/system to have this working.

Hi Community, Greetings!! We have a Cisco 2911/K9 (revision 1.0) 1 GB memory with uck9 permanent License and have VOiP SIP services configured using the Console Command terminal. We are facing the following issues as listed below;1. We can't pull up ...

In May I moved from TDM thru 4431's to SIP thru 8300's.  I have been trimming down dropped call issues, and up next is 102 codes. This is sparse, but I am a fan of 99.999% reliability of Telecom.  For example, from 1 July to yesterday we had 23,106 c...

Hello, I am currently using Cisco Unified Communications Manager (CUCM) version 11.5.1.16900-16, and I am experiencing difficulties accessing the system with the browser version 127.0.6533.88/89 as of July 30, 2024.The error message displayed is: “Yo...

We are running Cisco Unified CM Administration System version: 11.5.1.12900-21.  This is my first go at anything Cisco IP, so excuse my ignorance.  We are able to call outbound, but when we call inbound, our SIP provider receives a 404 not found and ...