HP 8920B Programmer's Manual page 481

Cntl Channel
NOTE:
This field is used to set the control channel number used by the Test Set.
The :CCHannel command is used to control this field.
The
Cntl Channel
:CCHannel command is sent, the change is reflected immediately in the physical
configuration of the Test Set (the control channel is immediately deactivated,
reconfigured, and then reactivated to reflect the change) and causes an immediate
change to the current state of the Call Processing Subsystem (the state is set to
).
Active
If the Test Set is in the Connect state and a change is made to the Cntl Channel field
the Connect state will be lost.
The query form of the command (that is, :CCHannel?) can be used to determine
the current control channel setting.
Syntax
:CCHannel <integer number>
:CCHannel?
Example
OUTPUT 714;"CALLP:AMPS:CCH 333"
OUTPUT 714;"CALLP:AMPS:CCH?"
ENTER 714;Control_chan
Chapter 8, Programming The Call Processing Subsystem
Programming The CALL CONTROL Screen
field is an immediate action field. That is, whenever the
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