Dialogic 6.2 Manuale Utente

Wink Start with Feature Group B & D

November 2009

281

To configure a Brooktrout module for wink start with Feature Group 

B and D signaling, the host must issue an L4L3mENABLE_CAS 

with an IISDN_ROBBED_BIT_DATA structure that contains the 

following settings:

„

send_glare_err_event = 0 (not used for wink start)

„

in_trunk_type = IISDNttWINK_START (the default value)

„

out_trunk_type = IISDNttWINK_START (the default value)

„

fgb_fgd_mode = 1 (enabling Feature Group B and D)

The remaining settings are described in the context of incoming and 

outgoing calls in the subsections that follow.

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, 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 acknowledge the receipt of digits, the host must issue an 

L4L3mTX_WINK message to send another wink to the network. To 

answer the call, the host must issue an L4L3mCONNECT_

REQUEST message.

 shows how a Brooktrout module processes an incoming 

Feature Group B and D call received over a wink start trunk.