Swact Processor Changeover; Associating Logs With Errmap Messages - Northern Telecom DMS-100 Series Maintenance Manual

5-4 DPP man-machine interface
the MAP level in the DIRECT mode, or from the EAT. Under no conditions
may any of these commands be issued in the normal MAP mode. For more
detailed information on the short form maintenance commands, refer to
297-1001-821.

SWACT processor changeover

The DPP provides an automatic processor changeover, occurring at 3:00
a.m. of each day, to test the integrity of the processor switch. Regardless of
whether the A or B processor is currently in the active mode, the DPP
automatically switches control to the standby processor unless there is an
error condition. You may also manually activate a processor switch with the
SWACT command, described in 297-1001-821.
A processor activity switch automatically occurs if an error condition causes
the alarm level of the active processor to rise above that of the standby
processor. When this occurs, watch the alarm display for both processors,
and determine which set of alarms would be least hazardous for continued
operation. If the processor with the higher alarm level is the desirable one to
use, you can manually switch back to that processor using the SWACT
FORCE command. This command produces a processor switch, preceded
by a disabling of all alarms displayed by that processor. For more details on
the SWACT FORCE command, see 297-1001-821.

Associating logs with ERRMAP messages

Table 5-1 lists ERRMAP entries and the associated DPP default alarms and
levels. This table crossreferences the log messages corresponding to each
ERRMAP entry.
Table 5-2 lists ERRMAP entries information which describes the conditions
causing the ERRMAP entry to activate. Information defines how often a
particular condition is tested, the method(s) required to reset (manual or
system) the alarm, and an indication of the default alarm type and level.
The DPP uses the Man-Machine Language (MML) format for displaying
commands and log messages. The MML format specifies the general form
and content in accordance with Bell system specifications. With commands,
the DPP supplies both the content and format; with log messages, the
DMS-100 supplies the MML format. For further details concerning the
MML Message Format, see the BELLCORE (Bell Communications
Research) PUB 54100 - Bell System Specification of CCITT MML.
297-1001-537 Standard 01.02 December 1993
Note: Automatic mode changes such as AP to BP or BP to AP occur only if
the alarm level in the standby processor (the processor to which the switch is
directed) is of a lower severity level than the active processor being switched
from.