Category Archives: IP Telephony

CUCM: Calling Search Space and Partition examples

This is a re-write of Understanding calling search space and partition, I attempt to simply it and give examples. Partition Partition is to group entities together. Entities are directory numbers, route pattern and translation pattern. Directory numbers are group together … Continue reading

Posted in IP Telephony | Tagged , , , | 1 Comment

CUCM: Outgoing call restriction with route pattern

The cisco 2951 is a 2-RU size router with 4x FXOs module. One phone provider carrier line was connected to the FXO ports. The Cisco 2951 was configured as MGCP, which was registered to CUCM server cluster. This post shows … Continue reading

Posted in IP Telephony | Tagged , , , , , , , , | 1 Comment

CUCM: Redundancy (Call processing failover)

Introduction The result of the Cisco IP phones failover to secondary or tertiary CUCM server is instantaneous in the point of view of enduser, if everything was configured correctly. The test was done with 13 registered devices, of course as … Continue reading

Posted in IP Telephony | Tagged , , , , , , , , , , , , , , | 6 Comments

Cisco 7965 Trust List update failed

I was trying to test the CUCM failover by shutting down a server, there were two 7965 ip phones refused to register onto the server, and they only connect themselves to only one server. I have googled and found a … Continue reading

Posted in IP Telephony | Tagged , | 11 Comments

CUCM & Unity Connection: Database backup with Disaster Recovery System

Doing backup is easy with the Disaster Recovery System that is included for both CUCM and Unity Connection. The pre-requisite is that you must have a SFTP server which you can download free from freeSSHd. The freeSSHd for Windows is … Continue reading

Posted in IP Telephony | Tagged , , , | 1 Comment

CUCM: Hotline or Hotdial (Not using none partition)

Previously I have written a post about hotline configuration but that configuration example uses none partition which Cisco does not recommend. So here I shall re-do the post in creating a hotline configuration example by not using none partition for … Continue reading

Posted in IP Telephony | Tagged , , , , , , , , | Leave a comment

CUCM: Understanding Partition and Calling Search Space (CSS)

From the cisco documentation: “Understanding and Using Partitions and Calling Search Spaces with Cisco CallManager“, it says phones located in different partitions cannot call to each other, phones that reside within the same partition can call to each other. “Note: … Continue reading

Posted in IP Telephony | Tagged , , , , | 2 Comments