Bts Alarm Connection; External Alarm Connection; Fig 27: Pin Allocation For "Bts_Alm" Port; Fig 28: Pins Allocation For "Ext_Alm - Comba Telecom RA-5200 Installation Manual

3.5.7 BTS ALARM CONNECTION

The equipment alarms can be signaled to the BTS via voltage-free relay contacts. The voltage-free
relay connections are connected to the DB-9 port "BTS_ALAM" located on the MCU of MOU. The
following figure and table shows the pin allocation and definition
Pin Number Definition
1 BTS_OPEN
2 BTS_CLOSE
3 BTS_COM
4 ~ 7
Depending on OMT/OMC configuration, alarm to BTS can be
pin1 and pin3 'closed' or b) pin2 and pin3 'opened'.

3.5.8 EXTERNAL ALARM CONNECTION

Three external alarms INPUT to RRU are realized on the "EXT_ALM" port, this is a 7-pin round
connector. The following figure and table shows the pin allocation and definition. Pin numbering are
shown looking-into the connector on the enclosure.
Pin
1
number
Alarm EXT.
definition Alarm 1
RA-5200 QI
ENU Status : 1-0-0
INSTALLATION GUIDE FOR RA-5200
1
BTS_OPEN
2
BTS_CLOSE
3
BTS_ COM
4
5

Fig 27: Pin allocation for "BTS_ALM" port

Connects to the normally opened terminal of the voltage free
relay.
Connects to the normally closed terminal of the voltage free
relay.
Connects to the common terminal of the voltage free relay.
NC Reserved.
Table 21: Pin definition of the BTS_ALM port
1
3
6

Fig 28: Pins allocation for "EXT_ALM"

2 3
EXT. EXT.
Alarm 2 Alarm 3
Table 22: External alarm signal definition
Copyright - refer to title page
6
7
8
9
Description
signaled from RA-5200 by either: a)
2
5
4
7
4 5
GND Reserved
6 7
Reserved Reserved
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