User guide

August 2001 229

Double Wink Start

Table 38 shows the pattern of bits transmitted by the CO and

CPE in the Double Wink Start protocol.

Table 38. Double Wink Start: CO Calls CPE

In the Double Wink Start Protocol, both ends transmit 00 in the

idle state. When the CO seizes the line, it transmits 11 and

continues to transmit that pattern throughout the conversation.

The CPE transmits a wink to acknowledge the seizure, and

another wink to acknowledge receiving digits. The CPE begins

transmitting 11 when it answers the call. To disconnect, both

ends transmit 00.

Status CO CPE Timing Parameters

Idle 00 00

Seizure 11 --> 00

Wink 11 <-- 00/11/00 RDG_REMOTE_MIN_SEIZE,

RDG_LOCAL_WINK_DUR

CO sends digits 11 00

Wink 11 <-- 00/11/00 RDG_REMOTE_MIN_SEIZE,

RDG_LOCAL_WINK_DUR

Answer 11 <-- 11

Conversation 11 11

CPE disconnects 11 <-- 00

CO disconnects 00 --> 00 RDG_REMOTE_IDLE_TIMEOUT

HookFlash 11 <-- 11/00/11 RDG_LOCAL_FLASH_DUR

11/00/11 --> 11