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Wink Start & Delay Dial Signaling
November 2009 277
The remaining settings are described in the context of incoming and
outgoing calls in the subsections that follow. Brooktrout modules
process calls in the same manner on both wink start and delay dial
trunks.
Incoming Call Processing
During an incoming call, the host receives an L3L4mPRE_SEIZE
message if send_preseize_event = 1 in the IISDN_ROBBED_BIT_
DATA structure. This message is sent when the module detects an
incoming seizure (off hook). The module automatically responds to
the seizure by sending a wink signal, indicating it is ready to receive
digits. The maximum number of digits the module expects to receive
must be specified in the max_incoming_digit_count field. The digits
are reported to the host in an L3L4mSETUP_IND message. To
answer the call, the host must issue an L4L3mCONNECT_
REQUEST message.
Figure 25 shows how a Brooktrout module processes an incoming
call received over a wink start or delay dial trunk.