AudioCodes Mediant 500L MSBR

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User's Manual 31. SBC Overview

Version 6.8 539 Mediant 500L MSBR

♦ The 'Destination Type' field is set to Hunt Group, which is specifically used

for call center survivability.

♦ The 'Destination IP Group ID' field is set to the IP Group of the call center

agents.

The figure below displays a routing rule example, assuming IP Group "1" represents

the TDM Gateway and IP Group "3" represents the call center agents:

Figure 31-12: Routing Rule Example for Call Center Survivability

31.8.4 Survivability Mode Display on Aastra IP Phones

If the SBC device is deployed in an Enterprise network with Aastra IP phones and

connectivity with the WAN fails, the device provides call survivability by enabling

communication between IP phone users within the LAN enterprise. In such a scenario, the

device can be configured to notify the IP phones that it is currently operating in Survivability

mode. When this occurs, the Aastra IP phones display the message, "StandAlone Mode"

on their LCD screens. This feature is enabled by setting the SBCEnableSurvivabilityNotice

parameter to 1.

When this feature is enabled and the SBC device is in Survivability mode, it responds to

SIP REGISTER messages from the IP phones with a SIP 200 OK containing the following

XML body:

Content-Type: application/xml

<?xml version="1.0" encoding="utf-8"?>

<LocalModeDisplay>StandAlone Mode</LocalModeDisplay>

</LocalModeStatus>

</LMIDocument>

31.9 Call Forking

This section describes various Call Forking features supported by the device.

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