SIP User's Manual 302 Document #: LTRT-65412
MP-11x & MP-124
6.8.8 Emergency Call Parameters
The emergency call parameters are described in the table below.
Table 6-40: Emergency Call Parameters
Parameter Description
[Enable911PSAP]
If enabled, the device supports E911 DID protocol according to
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
Note: This parameter is applicable only to FXO interfaces.
Emergency Numbers
[EmergencyNumbers]
Defines a list of numbers which are defined as 'emergency numbers'.
When one of these numbers is dialed, the outgoing INVITE message
includes the Priority and Resource-Priority headers. If the user sets
the phone on-hook, the call is not disconnected, but instead a Hold
Re-INVITE request is sent to the remote party. Only if the remote
party disconnects the call (i.e., a BYE is received) or a timer expires
(set by the parameter EmergencyRegretTimeout) is the call
terminated.
The list can include up to four different numbers, where each number
can be up to four digits long.
Example: EmergencyNumbers = ‘100’,’911’,’112’
Note: This parameter is applicable only to FXS interfaces.
Emergency Calls Regret
Timeout
[EmergencyRegretTimeout]
Determines the time (in minutes) that the device waits before
tearing-down an emergency call (defined by the parameter
EmergencyNumbers). Until this time expires, an emergency call can
only be disconnected by the remote party [(typically, by a Public
Safety Answering Point (PSAP)].
The valid range is 1 to 30. The default value is 10.
Note: This parameter is applicable only to FXS interfaces.
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