Nortel 1110 User Guide

 Features overview

IP Phones

Description, Installation, and Operation

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LED status of the Mute, Handsfree, and Headset keys

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DRAM content

Note: All other elements (feature keys, soft keys and text areas) are 
retained until the user presses a key or the connection with the Signaling 
Server is resumed. If the user presses a key during the failover, the 
display is cleared and a localized “Server Unreachable” message is 
displayed.

The IP Phone uses this new mode of reregistration only when the Signaling 
Server explicitly tells the IP Phone to do so. IP Phones clear all call 
information if they register to a Signaling Server or Line Terminal Proxy 
Server (LTPS) that does not support the ACF feature.

For more information on Active Call Failover, see IP Line: Description, 
Installation, and Operation  (553-3001-365). 

Enhanced UNIStim firmware download feature provides the following 
functionality for IP Phones:

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Enhanced firmware file header that includes the IT_TYPE and name 
string for each IP Phone type. 

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Revised definition of the IP Client’s IP Phone identification.

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Maintenance Mode for the Signaling Server that allows more 
simultaneous firmware downloads.

Note: Maintenance Mode is not applicable to Voice Media Gateway 
Cards.

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Identification of the registered IP Phones using string names and detailed 
identification of IP Phones that register as emulations of the base 
IP Phone 2001, IP Phone 2002, and IP Phone 2004.

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UNIStim IP Phones are able to register with older versions of firmware 
when the UFTP servers are busy, and are periodically offered the option 
start the firmware upgrade to the IP Phone.