X25AM Configuration and Management Manual
PTrace for the X25AM Subsystem
X25AM Configuration and Management Manual—523424-004
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The Application Level
Run the application again. When it has finished processing, stop the trace:
-> TRACE,STOP
8. Check the trace to make sure that it worked (run PTrace from SCF).
9. The call was accepted. If the port numbers were correct and the call was still
cleared the same method would still apply, for the most part. You would check the
call request packet for unsupported facilities, user data, missing calling address
fields, and so on.
Your HP representative also may be able to help you find out why calls are not
accepted. Using SCF, you can alter almost any field you want to get the calls to go
through. Also remember that most PDNs have their own specific addressing
requirements to which you must conform.
The Application Level
To determine application problems and their relation to level 3, use SELECT (L4,L3).
The application can communicate with X25AM using ITI for terminals connected to
PADs, PTP mode for transferring data directly to the PDN, NAM mode for multiple
NonStop systems using Expand with PSDN, and QLLC mode for SNA systems with
PSDN. The application communicates with X25AM by posting WRITEs, READs,
SETMODEs, CONTROLs, and so on to the subdevice. The NonStop file system
forwards each call to X25AM as a link control block (LCB). X25AM picks up each call
through LISTEN. When X25AM finishes the operation, it returns an appropriate FE
error (that is, 0= FEOK, 140= LCN cleared). Level 4 traces each LISTEN and
WRITELINK as X25AM detects it. The following example is a trace taken with level-3
>PTRACE FROM TRX3
?SELECT L3; RECORD ALL
Trace of: \SLUGO.$DATA2, Type (61,0).
Ptrace Data File: \SLUGO.$SIGN.EDX25.TRX3
Trace started: 02/12/99 14:50:16.624765
First trace entry: 02/12/99 14:50:16.624765
Last trace entry: 02/12/99 14:50:40.744765
Trace entry size limit: 120
L3 Pkt In Record 18D Seq 18 Type 51 Time 14:50:37.487673
SDN #000/%000 LEN #0014 GFI(QD_8) 0001 LGN/LCN $032
Call^req
000: 1032 0B55 2220 4111 0300 0000 0000
L3 Pkt Out Record 24D Seq 24 Type 50 Time 14:50:37.487673
SDN #001/%001 LEN #0005 GFI(QD_8) 0001 LGN/LCN $032
Call^conf
000: 1032 0F00 00