
Customizing Signaling
114056 Rev. A 9-7
T322 4 1 through 24 Defines the Status Enquiry Sent timer value (in seconds). This
timer begins when the circuit sends a STATUS ENQUIRY
message to the network. This message checks the validity of
a call by requesting the call state (that is, the state of an active
call, the state of a call in progress, or the Null state if the call
reference does not relate to an active call or a call in
progress).
The Status Enquiry Sent timer stops when the circuit receives
a STATUS message from the network.
If the timer expires before the circuit receives a STATUS
message, the circuit can transmit as many STATUS ENQUIRY
messages as specified with the Num Stat Enquiries Permitted
parameter (see “Defining Retransmissions” later in this
chapter). If the circuit still does not receive a response, the
circuit clears the call.
TDisc 4 1 through 180 Defines the SAAL Data Link Disconnect timer value (in
seconds). This internal timer alerts upper layers that the link is
down. The timer begins if the entire link goes down for any
reason.
When the link goes down, the SAAL layer sends a
DISCONNECT REQUEST message to the upper-layer
application manager. The SAAL layer sends a disconnect
request every time the SAAL Data Link Disconnect timer
expires and continues to send this message until the link
becomes operational.
(continued)
Table 9-1. Signaling Timer Descriptions
(continued)
Name Default Range Description
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