Envoy ACP/XF Application Programming Manual

Asynchronous Balanced Mode (ABM) Protocols
EnvoyACP/XF Application Programming Manual–132179
2-15
Initiating and Terminating an ADCCP-ABM Link
When either application wants to terminate the session, the application calls CONTROL
18 and closes the line. A single CONTROL call is enough, but the application must issue
a CLOSE for each OPEN procedure, as follows:
!Disconnect the line
CONTROL fnum^1,18)
AWAITIO fnum^1
!Close the line; conversation is complete.
CLOSE fnum^1
CLOSE fnum^2
CLOSE fnum^3