Category Archives: Telephony

Configure PLAR on SCCP and SIP Phones in CUCM

PLAR is a common feature often used for elevator or emergency phones in public areas. The idea is that when someone takes the phone off hook a call is immediately placed to someone who can help. It’s a critical configuration to get right and test before giving any stamp of approval. Continue reading

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Dial-Peer Destination Balancing

Traditionally, VOIP dial peers follow a fairly limited creation process. You can match a single pattern and direct to a single destination…

…In IOS XE 3.11S and IOS 15.4(1)T a new concept of server groups was created. Continue reading

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CUCM Partitions and Calling Search Space Basics

To understand the Class of Control mechanisms in Cisco’s Unified Communications Manager it’s vital that you understand Partitions and Calling Search Spaces. There are a number of analogies that can be drawn to illustrate the concept. I personally have found the analogies more complicated than just a simple explanation. Continue reading

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Google Voice at Home without Asterisk

Looking to use Google voice at home as your traditional home phone service without using some crazy Asterisk hack? You may even be fed up with the complexity of Asterisk anyhow, particularly if a simple voice gateway is all you have been using it for. There is an answer to this and it comes in the form of an inexpensive device called the Obi. Continue reading

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