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DEFINITY Enterprise Communications Server Release 8.2
Upgrades and Additions for R8r
555-233-115
Issue 1
April 2000
Multicarrier G2 Universal Module to R8r EPN
5-6Read This First
5
Alarm Connection
The D6 connector on G2 systems had 31 alarm-monitor appearances (Unit 1 to
Unit 31) for external equipment. The AUXILIARY connector on an R8 PPN only
has appearances for 1M (major alarm) and 1m (minor alarm). If the G2 system
being upgraded used more than 1 major or more than 1 minor alarm-monitor
appearance, these extra appearances, they can either be distributed to the
AUXILIARY connector on a DEFINITY ECS Release 8 EPN, or “ganged” so that
several external devices share the same appearance. The alarms can also be
accommodated by paralleling them to the above connections.
NOTE:
When several external devices are ganged to the same appearance, each
device loses its individual identity. An alarm on a shared appearance only
denotes that 1 of several devices reported a problem. Subsequent
maintenance effort is needed to determine which device reported the
problem and the nature of the problem.
The control circuit pack behind the AUXILIARY connector detects external
alarms with a ground-detector chip. Therefore, to gang several external
devices, every device must be able to return a true relay ground closure to
the AUXILIARY connector. Alternatives, such as a TTL low driver, are
inadequate.
The following tables correlate wall-field terminal numbers, connector pin
numbers, lead colors, and lead designations for the G2 D6 and DEFINITY ECS
Release 8 AUXILIARY connectors.