Dialogic 6.2 Manuale Utente

Wink Start with Feature Group B & D

November 2009

283

The host receives an L3L4mPROGRESS in response to the 

L4L3mCALL_REQUEST to start the call. The host then receives an 

L3L4mRX_WINK message when the module detects a wink from the 

network. The module waits a period of time (determined by the fixed 

pause timer) before sending digits. When the timer expires, the host 

receives an L3L4mSEIZE_COMP message if send_seize_comp_

event = 1 in the IISDN_ROBBED_BIT_DATA structure.

For an incoming call teardown, refer to 

section; for an outgoing call teardown, refer to 

 at the end of 

this section.

Wink start with Feature B and D is designed to support transmitting 

digits other than dial pulse digits. If called_party_digits = 0 in the 

L4L3mCALL_REQUEST that started the call, the module waits in 

outdialing state indefinitely. During that time, another device 

connected to the Brooktrout module over the TDM bus (such as a 

digital tone generator) is used to outpulse digits to the network. 

When that device is finished transmitting, the host must issue an 

L4L3mEND_DIAL message to make the module continue call 

processing.

After the digits are transmitted, the network acknowledges their 

receipt by sending a wink to the module. The host receives an 

L3L4mRX_WINK when this wink is detected. The module then 

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.

 shows how the module makes an outgoing Feature Group 

B/D call over a wink start trunk.