5
X
RS-232,485 + 2
X
E
THERNET
/2 M
BIT
/
S
G.703 (G.704) M
ULTIPLEXER
O
PERATING
M
ANUAL
IOA81-1E
5
August 2004
2.2 Rear
panel
The following controls are located on the rear panel of the device:
•
E1 interface connectors,
•
Alarm contact connector,
•
Connectors of RS-232, 485, and Ethernet 10BASE-T tributary channels,
•
LEDs for signalling the status of 10BASE-T interfaces (LNK,RCV),
•
Screw terminal for connecting the 48 V DC power supply,
•
Grounding terminal.
POWER
LNK
LNK
RCV
RCV
10BASE-T
10BASE-T
2x10BASE-T
5xRS232/485
MDI-X
DCE
C
2
4
C
C
C
C
C
1
3
5
6
7
B
A
75W
120W
Alarm
7,8 SHIELD
5
1
9
6
1
2
3
4
5 6
1 -
Connectors of E1 interfaces – balanced 120
Ω
DB-9, coaxial 75
Ω
1,6/5,6 mm
2 -
Screw terminal for alarm contact
3 -
Connectors of RS-232, 485 tributary chatnnels:
C1 – first tributary channel, etc.
4 -
Connectors of Ethernet – RJ-45 tributary channels
Status signalling for Ethernet channels (RCV- reception of frames at the port, LNK – informs whether the
port is connected correctly)
5 -
Screw terminal for power supply
6 -
Grounding terminal
Fig. 4.
Rear panel