Wink Start & Delay Dial Signaling
November 2009 279
Outgoing Call Processing
During an outgoing call, the host receives an L3L4mPROGRESS in
response to the L4L3mCALL_REQUEST to start the call. The host
then receives an L3L4mSEIZE_COMP message if send_seize_comp_
event = 1 in the IISDN_ROBBED_BIT_DATA structure. This
message is sent when the module detects a wink from the network,
indicating the network is ready to receive digits. After the digits are
transmitted, the module waits for answer supervision from the
network (indicating the far end has gone off hook) or for an answer
timer to expire (if timed_answer_supervision = 1). When answer
supervision is received or the timer expires, the host receives an
L3L4mCONNECT indicating the call is connected.
Figure 26 shows how the module makes an outgoing call over a wink
start or delay dial trunk.
Call Teardown Processing
For an incoming call teardown, refer to Figure 46 on page 314 at the
end of this section; for an outgoing call teardown, refer to Figure 47
on page 315 at the end of this section.