At$vl, At$vm, At$vp – Eicon Networks DIVA T/A ISDN Modem User Manual
Page 55: At$vq, At$vu

Utility Commands
DIVA T/A ISDN Modem Reference Guide
◆ Page 55
AT$VL
Start or display the Result of a LAPD trace.
You can specify the total size of the trace buffer and the length of each trace entry. Use
the following syntax:
AT$VL [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VL
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes.
AT$VM
Controls the internal Mail Trace. Your Eicon Technology Customer Services
representative may ask you to use this command.
Format is:
AT$VM [total size, entry_size, filter] (parameters are optional)
Example:
AT$VM
starts mail trace with default size of 16K, entry_size of 64 bytes, no filter
AT$VM -p
to pause the mail trace
AT$VM -r
to reset the mail trace
AT$VM -s
to restart the mail trace
AT$VP
Start or Display the Result of a PPP trace.
You can specify the total size of the trace buffer and the length of the each trace entry.
Use the following syntax:
AT$VP [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VP
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes
AT$VQ
Start or Display the Result of a Q931 trace.
You can specify the total size of the trace buffer and the length of the each trace entry.
Use the following syntax:
AT$VQ [trace size, entry length], where trace size and entry length are specified in
hexadecimal values.
For example, to specify a trace size of 32K and an entry length of 256 bytes, enter: AT$VQ
8000, 100.
If you do not specify trace size and length, the default values are used. The default trace
size is 16K, the default entry length is 128 bytes.
AT$VU
Internal TA access command reserved for VU.