Sip Features; Local Mode Sca Behavior Enhancement - Mitel 6865i Release Notes

Mitel 6800 Series SIP Phones 4.2.0 Release Notes

SIP FEATURES

LOCAL MODE SCA BEHAVIOR ENHANCEMENT

If the phone is configured for Shared Call Appearance (SCA) functionality whereby the line
mode is configured as BroadSoft SCA, the phone needs to send a SUBSCRIBE message to
get a dial tone to make a call. If the network device the phone is connected to loses WAN
Internet connectivity, the phone transitions into local mode.
In previous releases, the phone would continue to function (make/receive calls) locally when
in local mode, but only until the SCA subscription expired. Once the subscription expired, the
phone was no longer able to send a SUBSCRIBE message and therefore no dial tone was
available to make a call.
In Release 4.2.0. when the phone looses connection and is in local mode with the network
device, the phone switches to the generic line mode instead of the BroadSoft SCA line mode.
This ensures users are able to make and receive calls as the phone does not need to send the
SUBSCRIBE message to get a dial tone to make a call. Once the phone is connected to the
the network device again, the phone leave local mode and switches back to its original BroadSoft
SCA line mode.
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