Prior to CCM 4.0, the number of rings was configurable only at the cluster level through the Forward No Answer Timer Service Parameter. In CCM 4.0 and later, you can configure the number of rings cluster wide with this service parameter or at the DN level with the No Answer Ring Duration field. The default value for the No Answer Timer Service Parameter is 12 seconds. You can figure approximately 4 seconds for 1 ring. Please see the links below for configuration details.
Configuring the Forward No Answer Timeout in Cisco CallManager 3.x and 4.x
Unfortunately, this usually has to be set at the line level or set up a device pool to group the phones that you want to adjust for the number of rings. The parameter is No Answer Ring Duration, under Call Froward and Pickup settings. You can also use the MLPP option with Precedence Alternate Party, but that tends to get a bit convoluted. I would stick with changing at the Line level, depending on the number of devices that need to be modified. I think there is a flag under the CallManager Service Parameters as well, but I will have to check out the settings on my lab at home to confirm.
I tried to finf the No Answer Ring Duration under Call Froward and Pickup settings with out success, i have callmanager 3.3(4) release, so i dont know if this paremeter exist under other option in this release.
SIP traces provide key information in troubleshooting SIP Trunks, SIP
endpoints and other SIP related issues. Even though these traces are in
clear text, these texts can be gibberish unless you understand fully
what they mean. This document attempts to br...
Please find the attached HTML document, download and open it on your PC.
This provides an easy to use form where you simply answer a few
questions and it will render the proper jabber-config.xml file for you
to copy/paste. There is built in logic to verif...
CUCM Database Replication is an area in which Cisco customers and
partners have asked for more in-depth training in being able to properly
assess a replication problem and potentially resolve an issue without
involving TAC. This document discusses the bas...