X25AM Programming Manual

PTP Applications

X25AM Programming Manual—527201-001

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PTP Procedure Statements Summary

Determining Why a Call Has Been Disconnected

Use SETPARAM 9 to get the reason for the disconnection.

Decoding the Cause and Diagnostic Codes

For the diagnostic codes used by the X25AM process, see Appendix C, D-Series

Supplement for X25AM. X25AM always transmits a cause of 0 whether it is configured

as a DTE or a DCE. Use the following functions to decode the Clear, Reset, and

Restart Cause and Diagnostic codes:

•

SETPARAM 2:

Set 90 or get the Clear Cause and Diagnostic codes.

•

SETPARAM 4:

Set or get the Reset Cause and Diagnostic codes.

•

SETPARAM 5:

Get the Restart Cause and Diagnostic codes.

Counting 64-Byte Segments

Use the following formula to count 64-byte segments sent or received by a subdevice:

Count = count + ((data^byte^count + 63) / 64);

This can be used for calculating network charges. Sixty-four bytes is usually the

dividing line for packet charges. Packets less than or equal to 64 bytes usually cost

less than packets greater than 64 bytes. The count consists of two double word values,

the number of 64-byte blocks sent, and the number of 64-byte blocks received.

Use SETPARAM 21 to get the counts.

PTP Procedure Statements Summary

The following PTP procedure statements are described below: CLOSE, CONTROL,

OPEN, READ, SETMODE, SETPARAM, WRITE, and WRITEREAD.

If this is the last close for the subdevice and it is configured as an SVC, PTP clears the

call.

Note. CLOSE and CONTROL procedures are only used with an SVC. They are not needed for

a PVC connection.

CALL CLOSE (filenum)