User Manual

MDR2400/5800-SR, Orion2410/5810-SRi and Orion 5825-SR
862-01881 Issue 12c Page 18
MDR MTE 75/120 OHM DIGITAL INDOOR UNIT 651-04008-02, front panel
MDR MTE 120 OHM and 75/120 OHM DIGITAL INDOOR UNIT, rear panel
Orion 25 DIGITAL INDOOR UNIT 651-04189-01 (front panel – no rear panel connectors)
Figure 5. Digital Indoor Unit Connector Panels.
2.3.1 Payload Interface Options
The Digital Indoor Unit can be configured for nT1 or nE1 operation.
• 1, 2, 4 or 8(Orion 25) x T1 (1.544 Mbps)
• 1, 2, 4 or 8(Orion 25) x E1 (2.048 Mbps)
For T1 connectivity, bipolar AMI or B8ZS line coding is software selectable.
For E1 connectivity, bipolar AMI or HDB3 line coding is software selectable.
Line coding on the Orion 25 DIU may be selected separately for tributary channels 1 to
4 and 5 to 8 when used with an Orion 5850 RFU.
The payload can be connected on:
• Unbalanced 75 Ohm BNC connectors, 75/120 Ohm DIU only (RX= In, TX= Out).
• Balanced 120 Ohm, 25 way D-type connectors (refer to paragraph 4.2.4 for the
pin outs).
• Balanced RJ48C connectors (refer to paragraph 4.2.5 for the pin outs).
1 Payload
T1/E1
2 DIU
Status
LEDs
2 DIU Status
LEDs
3 Reset
button
3 Rese
t
button
9 RFU
DC Out
9 RFU DC
Out
4
4
5
5 6 10BaseT
RJ45 Socket
6 10BaseT
RJ45 Socket
7
7
8 DDIU/RFU
Data RJ45
8 DDIU/RFU
Data RJ45
10 Auxiliary IO
10 Auxiliary IO
11
DIU
D
CIn
11 DIU DC In
12
Fuse
12
Fuse
13 ON/OFF
Switch
14 Ground
Terminal
14 Ground
Terminal
1 Payload
T1/E1