LASTERROR [SRO] Contains the last error number encountered (see COPIAFACTS Program Error Messages). If there has been no error on this call, the number will be zero. The value is not reset when a particular operation is processed without error.
LAST_OUTCLASS[CV C>] Set in the FS file during outbound call outcome analysis to show the outcome class description text of the last attempt.
LAST_OUTCOME[CV C>] Set in the FS file during outbound call outcome analysis to show the outcome class letter of the last attempt.
LAST_RECORDFILE [SRO] Provides the full pathname of the file containing the last recording made, when the file has been selected using the $record_nextmsg command.
LAST_RECORDING [SRO] Provides the message number of the file containing the last recording made, when the file has been selected using the $record_nextmsg command.
LAUNCH_COUNTER_STEPS[CV J>] The value of this variable sets the intervals between log entries showing the progress of a job launch.  The default value is 10000 for job sizes larger than 100000 items, or 1000 for jobs larger than 10000, and otherwise 100.
LC_DETECT[SW] On Brooktrout boards which support this capability, turns off or on, with a value of 0 or 1 respectively, the loop-current (hangup) detection on the channel.
LINE [SRO] Contains the line number, of the current request at request time or from $fax_rcv_line at transmit time.
LINK_BEEP_RECORD[SW] A non-zero value assigned to this variable causes a beep to be played before a Dialogic link recording.
LINK_DTMF_RECORD [SW] Operates exactly as LINK_RECORD except that the recording is not started until the first or only key or key-pair specified in $allow_interrupt is detected during the link.  In this case the DTMF detection does not of course break the link.
LINK_INTRO [CV >C] Can be set to the full pathname of a voice file which is to be played to the called party before an SC-Bus linked call is connected. This overrides the standard voice prompt 88 which is played at this time if present.
LINK_LNUM [SRO] Contains the line number of the line on which the outbound part of an SC-Bus linked call is placed.
LINK_RECORD [SW] Can be set to the full pathname of a voice file which will be used to make a recording of both sides of an SC-Bus linked call. This value must be assigned before the call is set up, but the $set_var command can be placed in the $type transfer infobox.
LINK_STATUS [SRO] Contains the status of an SC-Bus or Diva Line-interconnect link:
0 no link
1 dial without call progress
2 dial with call progress
3 waiting for link
4 outbound call failed
5 outbound call hung up
6 timeout on link
7 DTMF detected
8 link active
9Diva or Copia VoIP dial completed
10dial multi-call
11waiting for multi-call
LINK_TERM [SRO] A value indicating the reason(s) for termination of an SC-Bus or Diva Line-interconnect link:
0 no link terminated
1 link timed out
2 this line hung up
4 other line hung up
8 this line terminated the link with DTMF
16 other line terminated the link with DTMF
32all calls failed on multi-call link
      Although this variable is set for both halves of a linked call, it is not accessible on the outbound side because the 'line' is not it a state where infobox operations can be performed. Note that LINK_STATUS will usually be zero at the end of a call, so LINK_TERM is needed to record the cause of termination.  More than one value may be added into the result.
LINK_WRAP_D[CV >C] Can be set to the full pathname of a voice file which will be played on the outbound half of the call after the link is terminated by a DTMF key on the inbound half. This overrides the standard voice prompt 91 which is played at this time if present, An empty assignment suppresses the message even if the standard prompt is present. The line is hung up after the message has been played.
LINK_WRAP_H [CV >C] Can be set to the full pathname of a voice file which will be played on the outbound half of the call after the link is terminated by a hangup on the inbound half. This overrides the standard voice prompt 90 which is played at this time if present, An empty assignment suppresses the message even if the standard prompt is present. The line is hung up after the message has been played.
LINK_WRAP_T [CV >C] Can be set to the full pathname of a voice file which will be played on the outbound half of the call after the link is terminated by timeout. This overrides the standard voice prompt 89 which is played at this time if present, An empty assignment suppresses the message even if the standard prompt is present. The line is hung up after the message has been played.
LIST_DELIMITER[CV >J] A single-character value in this variable, defined in a job instance UJP file, overrides the list-delimiter character set in Windows Regional Settings when processing CSV broadcast lists for a job.  It does not affect tab-separated-value lists.
LIST_SHOWSEQ[CV >J] A non-empty value in this variable causes JOBADMIN to show entries in the job status list with their sequential FS file numbers, instead of showing the actual FS numbers when randomized FS pickup has been selected for the job.
LNUM [SRO] Contains the number of the current line processing the call.
LOCAL_CSID[SRO] Contains the actual local CSID used for an outbound fax, after expansion of variables. The contents are only established at the start of a fax transmission, and the variable is intended for use on a $fax_header command.  This variable can also be assigned to in a pre-process to override the $fax_csid FS command, the $fax_csid USR command, and any CSID set in a call control DLL.
LOOPEXIT [SRW] Contains the reason code for transfer to the LOOPEXIT infobox, if enabled. Can be set to the return action code required during your LOOPEXIT processing. See $loop_exit.