Page 22 of 258 Overview
Normal Mode and Local Mode overview
Normal Mode
IP Phones that are physically located at the SRG but are registered with the main office are in Normal Mode. The main office provides centralized call processing for the SRG IP Phones. These telephones are registered to the main office TPS and are controlled by the Call Server at the main office.
Users of the SRG IP Phones receive the features, key layout, and tones of the main office Call Server. This provides feature and application transparency between the branch office and the main office.
Local Mode
An IP Phone at the SRG may be in Local Mode for two different reasons;
1IP Phone may have just booted up.
2IP Phone cannot communicate to the main office because of a WAN failure or a failure of the main office components.
Devices that are physically located with the SRG and are controlled by the SRG system are said to be in Local Mode. These devices consist of analog telephones, analog devices, such as, fax, and may include IP Phones.
Normally IP Phones are registered to the main office, in Normal Mode; however, when the IP Phone cannot reach the main office, it reverts to Local Mode.
IP Phone users in Normal Mode use the feature set on the main office. IP Phone users in Local Mode receive only those features and tones that are provisioned on the SRG. Users of analog
For information about the features supported in Local Mode, refer to SRG50 Configuration Guide.
Survivability
SRG provides survivability against WAN failure, main office Call Server failure, main office Signaling Server failure, and Gatekeeper failure.
