AudioCodes Mediant 600 User Manual page 737

User's Manual
Parameter
Emergency E911 Parameters
[E911Gateway]
[E911CallbackTimeout]
Web: Emergency Special
Release Cause
[EmergencySpecialRele
aseCause]
EMS: Enable 911 PSAP
[Enable911PSAP]
Version 6.6
when, for example, congestion occurs in a network.

[2] Emergency = Preemption of IP-to-Tel E911 emergency calls. If
the device receives an E911 call and there are unavailable channels
to receive the call, the device terminates one of the channel calls
and sends the E911 call to that channel. The preemption is done
only on a channel pertaining to the same Trunk Group for which the
E911 call was initially destined and if the channel select mode
(configured by the ChannelSelectMode parameter) is set to other
than "By Dest Number" (0). The preemption is done only if the
incoming IP-to-Tel call is identified as an emergency call. The device
identifies emergency calls by one of the following:

The destination number of the IP call matches one of the
numbers defined by the EmergencyNumbers parameter. (For
E911, you must define this parameter with the value "911".)

The incoming SIP INVITE message contains the "emergency"
value in the Priority header.
Notes:

This parameter is applicable to FXS/FXO, CAS, and ISDN.

For FXO interfaces, the preemption is done only on existing IP-to-Tel
calls. In other words, if all the current FXO channels are busy with
calls that were initiated by the FXO (i.e., Tel-to-IP calls), new
incoming emergency IP-to-Tel calls are dropped.

MLPP and Emergency services can also be configured in a Tel
Profile.

For more information, see 'Pre-empting Existing Call for E911 IP-to-
Tel Call' on page 369.
Enables Enhanced 9-1-1(E9-1-1) support for ELIN handling in Microsoft
Lync Server 2010 environment.

[0] = Disable (default)

[1] = Enable

[2] = Location-based manipulations
Defines the maximum interval within which the PSAP can use the ELIN
to call back the E9-1-1 caller. This interval starts from when the initial
call established with the PSAP is terminated.
The valid range is 1 to 60 (minutes). The default is 30.
Enables the device to send a SIP 503 "Service Unavailable" response if
an emergency call cannot be established (i.e., rejected). This can occur,
for example, due to the PSTN (for example, the destination is busy or
not found) or ELIN Gateway (for example, lack of resources or an
internal error).

[0] = Disable (default)

[1] = Enable
Enables the support for the E911 DID protocol, according to the
Bellcore GR-350-CORE standard. This protocol defines signaling
between E911 Tandem Switches and the PSAP, using analog loop-start
lines. The FXO device can be installed instead of an E911 switch,
connected directly to PSAP DID loop-start lines.

[0] = Disable (default)

[1] = Enable
737
52. Configuration Parameters Reference
Description
Mediant 600 & Mediant 1000