Nortel DMS-100 Series Maintenance Manual page 25

Commands
This section addresses the following commands associated with
RLCM-EDC:
LOADPM
BSY
RTS
SWLD
QUERYPM
TST
LOADPM command The LOADPM command is used to send a load to
the flash ROM bank in an RLCM-EDC. This command can be performed
on an in-service (InSv) or out-of-service (OOS) RLCM-EDC unit. The load
sent to a unit is always downloaded into the bank that is in standby mode at
the time. During an InSv download, the processor of the unit continues its
call processing functions executing the load in the active bank. Once the
download is complete, the new load in the standby bank remains dormant
until activated manually or by the system.
The system initiated activation of a standby bank will occur only during
attempts to recover from catastrophic failures in the RLCM-EDC. Manual
activation of the load in the standby bank requires operating company
personnel to enter a command at the MAP display terminal. The RTS
command with the switch load (SWLD) option is used when activating the
load in an OOS unit. The new SWLD command, positioned at menu item
number 13, is used when activating the load in an InSv unit. During
activation of the new load, the processor of the RLCM-EDC unit switches
the active bank to a standby state and starts executing the load in the newly
active (previously standby) bank.
When a unit of the RLCM-EDC is loaded and the load is activated, the
standby bank contains the old (previously active) load until operator
company personnel choose to manually load the standby bank with another
software load. This feature is useful when an operating company is
upgrading the RLCM-EDC to a new release of the software load. During
the upgrade the operating company may choose to retain the old load until
they are satisfied with the quality of the new software load. Operating
company personnel can, at any time, load the standby bank with the same
load as the active bank. This provides redundancy of loads in the
RLCM-EDC and is beneficial in the event of catastrophic load failures of the
active bank.
Maintenance overview 1-13
DMS-100 Family Maintenance Manual ABSK007