User Manual

AS4000 Release3 and Release 4 Central
Terminal Installation and Commissioning
DLP-004
605-0000-432
Issue 1.3a Date 18th October 1999
Page 4 of 4
3. Alarm Unit (Type 55B) External Connections
Run and terminate alarm cables from the central office alarm scheme on the 25 Way
D-Type connector as shown in Figure 12. Connect the -48V/24V alarm supply to the
alarm supply fuse box using 1.0mm cable and terminate on the D-type connector.
If a visual indication at the rack is all that is required, only the power connection to
pins 9 and 11 need to be connected.
To
Next
Rack
1 2 3 4 9 11
- 48V0V Return
5
6
Major (Prompt)
Minor (Deferred)
Receive Attention
To
Central
Office
Alarms
To
Alarm
Fuse Box
Airpan Alarm Unit Connections
Figure 12. AS4000 Alarm Unit Connections
Connect the station alarm cable to the backplane of the combiner shelf. See Figure 13.
DC SUPPLY
OFF
0
1
1 2 3 4
Station Alarm Connector
P1
JP5
JP7
RF Combiner Shelf
Figure 13. Station Alarm Connection