AT&T MERLIN LEGEND Release 2.0 System Programming And Maintenance Manual page 64

System Programming and Maintenance (SPM)
NOTE:
You cannot administer the SPM application on the lS-II/III PC because the
remote call (from your SPM PC) uses the lS-II/III PC's COM1 port, so the
system programming jack cannot be used for system programming. For
the same reason, a user at the lS-II/III PC end of the connection cannot
use SPM while your Pass-Thru is in effect. If use of SPM is attempted, the
user at the lS-II/III end sees this message:
PRE-EMPT IN PROGRESS
Please try again.
To initiate Pass-Thru, establish a modem connection between the SPM PC
and the control unit.
If the lS-II/lII PC does not respond to the Pass-Thru request from the control
unit (for example, because the PC is turned off), you see the following
message;
Pass-thru failed.
Please try again.
If the connection between the control unit and the lS-II/III PC fails, the
connection between the control unit and the SPM PC is dropped. You see the
following message:
Pass-through Session
unexpectedly terminated.
Please press Enter
to continue.
When you press , you are returned to the SPM Main Menu.
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Pass-Thru