Alarm Sending And Checking System - Nortel DMS-100 Series Reference Manual

The data loop jacks on each FSP or MSP in each equipment aisle in the
office multiply from frame to frame. These jacks connect to the alarm
crosspoint field shelf or AXU. At the alarm crosspoint field or AXU, the
data loops of all odd aisles and all even aisles multiply together. The odd
aisles are A, C, E, G in a continuing sequence. The even aisles are B, D, F,
H in a continuing sequence. The data loop activation circuits on the ACD
panels are designated as follows:.
The A and B aisle multiples connect to relay contacts in the data loop
control card(s).
The data communication ports at the IOC connect through cable to the alarm
crosspoint field or AXU. Data loop jacks for the A and B aisle multiples at
the DF connect through cable to the alarm crosspoint field. These ports and
jacks connect to the appropriate pins on the data loop control cards.
The data loop control switches on the ACD panels control the operation of
the data loop control cards. The A switch controls the data routing for the A
aisle multiple. The B switch controls the data routing for the B aisle
multiple. The A + B switch, when activated, joins the A and B aisle
multiples together. Different combinations of the three switches provide the
following alarm routing options:
1 A aisle multiple to IOC port A, DF, or open
2 B aisle multiple to IOC port B, DF, or open
3 A and B aisle multiples joined to IOC port A, DF, or open

Alarm sending and checking system

The alarm sending and checking system (ASCS) is a software feature
compatible with all versions of the OAS. When active, the feature provides
the ability to send indications of alarm conditions that occur in the DMS
office. These alarm indications transmit over a trunk to a remote operator
position.
If the receiving operator is at a Traffic Operator Position System (TOPS)
position, an ANI-8 information digit, spilled over the trunk converts to an
alarm indication on the video screen. The operator uses the TOPS facility to
access additional information.
If the trunk termination is a normal operator position, when the recipient
answers the call, the system generates a tone across the trunk. This tone
indicates that the originating office has an alarm condition. The operator
dials a directory number (DN) allocated to the ASCS checking facility. The
A for odd aisles
B for even aisles
DMS-100 Family Alarm System Description Reference Manual BASE12
OAS alarm and Control Circuits 6-15