Cisco 7936 - IP Conference Station VoIP Phone Systeemhandleiding - Pagina 46

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Cisco 7936 - IP Conference Station VoIP Phone Systeemhandleiding

1. Phone Features

Chapter 40

Cisco IP Phones

Phone Administration Tips

The default specifies 10 phones per second. If a primary Cisco CallManager were

to fail, the phones will fail over to the secondary Cisco CallManager. The failover

process happens as fast as possible, using the priority queues to regulate the

number of devices that are currently registering.

When the primary Cisco CallManager recovers, the phones get returned to that

Cisco CallManager; however, you do not need to remove a phone from a working

Cisco CallManager, in this case the secondary, as fast as possible because the

phone is on a working system. The queue depth gets monitored (using the

MaxPhonesFallBackQueueDepth service parameter setting) to determine whether

the phone that is requesting registration gets registered now or later. If the queue

depth is greater than 10 (default), the phone stays where it is and tries later to

In the Service Parameters Configuration window, you can modify the

MaxPhonesFallBackQueueDepth service parameter. If the performance value is

set too high (the maximum is 500), phone registrations could slow the

Cisco CallManager real-time response. If the value is set too low (the minimum

is 1), the total time for a large group of phones to return to the primary

Cisco CallManager will be long.

Dependency Records

If you need to find out what directory numbers a specific phone is using or what

phones a directory number is assigned to, click the Dependency Records link that

is provided on the Cisco CallManager Administration Phone Configuration or

Directory Number Configuration window. The Dependency Records Summary

window displays information about directory numbers that are using the phone.

To find out more information about the directory number, click the directory

number and the Dependency Records Details window displays. If the dependency

records are not enabled for the system, the dependency records summary window

displays a message.

For more information about Dependency Records, refer to

"Accessing

Dependency Records"

and

"Removing a Directory Number from a Phone"

in the

Cisco CallManager Administration Guide.

Cisco CallManager System Guide

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