X25AM Programming Manual

Introduction
X25AM Programming Manual—527201-001
1-9
Call User Data (CUD) in Call Setup Packets
The CUD default values can be changed by any of the following methods:
Programmatically
•
Call the SETPARAM 41 procedure
•
Call the SETMODE 28 procedure to reset the CUD field to the SCF-configured
values before clearing an incoming call
In an incoming packet
•
Receive an incoming call that has a CUD field
In a command file (such as an Obey file)
•
Use the SCF ADD or ALTER commands for a subdevice
The following subsections discuss how CUD default values can change by any of
these methods. For more information about using SCF commands with X25AM, refer
to the X25AM Configuration and Management Manual.
Comparing Static and Dynamic CUD Values
The values in this field are treated as dynamic CUD data when either of these occur:
•
An application calls the SETPARAM 41 procedure.
•
X25AM receives an incoming call that contains data in the CUD field.
The values are treated as static CUD data when:
•
An SCF command such as ADD or ALTER to change a default value.
The values return to those originally configured by SCF when:
•
The SETMODE 28 procedure is called before clearing an incoming call.
Static CUD values result when the CUD field is specified using the SCF ADD or ALTER
command. These are the values that are present in the CUD field when a subdevice is
first opened (before either the application issues a SETPARAM 41 or the SU receives
an incoming packet). This would occur, for instance, when SCF commands appear in a
command file.
Dynamic CUD values are those which may have been specified either during that
session with a SETPARAM 41 procedure, or updated by receiving an INCOMING
PACKET that has a CUD field. Dynamic CUD values remain until the SU is closed.
They are not reset as a result of clearing a call.
To reset the CUD field to its SCF-configured values before the call is cleared, use
SETMODE 28.
The SCF INFO, DETAIL command displays the current CUD values, either static or
dynamic, depending on whether the values have been overridden by SETPARAM 41
or an incoming call.