• Cisco Unified Communication Manager (CUCM) - How To Add Phones


    Before starting you should reset your phone(s) if they have been previously registered to another CME/CUCM: https://realtechtalk.com/Cisco_IP_Phone_How_To_Reset_To_Factory_Settings_Instructions_CP_9971_8800_8900_8845_8851_8841_8831_7961_7960_7945_7942_7941_7940-2212-articles........
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    Have you got this error from Apache? [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [error] (28)No space left on device: Cannot create SSLMutex At first glance it appears that you may be out of disk space but the issue is ipc or interprocess communication. This will clear out the ipcs processes so things can work, this often happens during high traffic and may be a sign of DDOS. The command below will fix it, it will list al........
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    Video Links: How To Setup 2 Phones on a Single CME Router and get the GUI going. How to use Dialpeers with CME with two routers How to implement call restrictions using COR / Class of Restriction Set your clock: HH:MM:SS clock set 22:00:00 24 September 2024........
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    Install Errors on Version 12: This error happened on QEMU emulator version 2.11.1 pve-qemu-kvm_2.11.1-5 on Proxmox/Debian but installing on QEMU.12 on Centos 6 did not produce the error. *Update it is not related to the OS or QEMU version. This happened in Centos 6 too after a second install. What really causes this even though you successfully install........
  • Cisco Unified Communications Manager 12 Install Errors on Proxmox/KVM


    The strange thing is that usually the first install or two will work on any new machine but then it suddenly won't. I had this experience on QEMU 2.13 on a different machine. There is something finicky or buggy about the CUCM installer even when choosing the same virtual hardware specs. qemu-kvm command: /usr/libexec/qemu-kvm -version QEMU PC emulator version 0.12.1 (qemu-kvm-0.12.1.2-2.506.el6_10.1), Copyright (c) 2003-2008 Fabrice Bellard ........
  • Cisco Unified Communications Manager 12 CUCM 12 - How To Enable Video Calling


    There are multiple layers but most are enabled by default such as the setting in the Phone Device Settings. However the one not enabled by default is the one in "Enterprise Phone Configuration". Enable "Cisco Camera" and then reboot your phones to enable it.........
  • Cisco Unified Communications Manager / CUCM IP Telephony Definitions


    DN = Directory Number: It is basically the extension of the phone In the example below, 55 is a DN assigned to the phone.........
  • Cisco CUCM Unified Communication Manager Howto Guide and Tutorials


    Install Issues: How to Make CUCM iso /modify to work on non-VMWare machines like QEMU/Xen/OpenStack If you get kernel panic errors in VBOX usually disabling Nested Paging will fix the issue (thanks to Mark). ks_pre.sh error is caused by having the wrong VDX pattern (change it do sd per guide link above) and/or the wrong VMSpecs (Cisco req........
  • How Does Cisco CUCM (Cisco Unified Communication Manager) Work?


    Cisco's CUCM (Cisco Unified Communication Manager) is a system that combines voice, video, data and mobile products into a single unified management suite. At its core, the CUCMis like a "Super PBX" that controls the flow of all communications through an organization even single or multiple site deployments. Cisco's CUCMmakes communication more effective and simple through centralized management and unification of communications resources.........
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