6100 ADCCP Programming Manual

(82) CONNECT
Requests and Responses
6–44 069225 Tandem Computers Incorporated
(82) CONNECT The CONNECT request and response are used to accept incoming calls and request
outgoing calls. This request and response works only with the ADCCP/X21 protocol
module.
Request The CONNECT request has different functions. Depending on the values you place in
the request Modifier and the Text field, a CONNECT request can indicate any one of
the following types of connections:
Readiness to accept an incoming call
A request for a normal outgoing call
A request for a direct outgoing call
A request for a selective direct outgoing call
A request for facility registration or facility cancellation
Accepting an Incoming Call
When the CONNECT request is used to accept an incoming call, it causes
ADCCP/X21 to signal “DTE ready” and wait for a call to arrive from the DCE. This is
called a passive CONNECT request because ADCCP/X21 does not actively initiate a
connection.
The request buffer format for accepting and incoming call is:
Function := 82
Modifier := 1
Request ID := A unique value from 1 through 32767,
determined by the application
Text Out := 8
Text In := 10 + length of DCE-provided information
Text := Reserved for ADCCP :Eight bytes
Set these bytes to 0
Note If your application has been waiting for an incoming call and now wants to initiate a connection, you must
first cancel the pending passive CONNECT request before ADCCP/X21 will accept a new active
CONNECT request. To cancel a CONNECT request, issue a DISCONNECT request.