User's Manual

MDR2400-SR, MDR5800-SR and Orion 5825-SR
Issue 10 Page 21
Figure 5. Indoor Unit Connector Panels (numbers refer to paragraph number 2.3.x)
2.3.1 Payload Interface Options
The Indoor Unit can be configured for nT1 or nE1 operation.
h. 1, 2, 4 or 8(Orion 25) x T1 (1.544 Mbps)
i. 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 IU may be selected separately for tributary channels 1 to
4 and 5 to 8 when used with an Orion 5850 OU.
The payload can be connected on:
• Unbalanced 75 Ohm BNC connectors, 75/120 Ohm IU 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).
2.3.2 1+1 Redundancy Protected Payload System
The MDR and Orion radios can be used in a 1+1 redundant mode system to
protect the tributary payload data carried over a radio link. This system detects the
quality of the link over which it is receiving data and allows switching between two
parallel radio links to protect the user data against link failures.
Please refer to Appendix I, or the Protection Kit user manual, doc. no. 862-02236
for detail on the functioning of this system.
2.3.3 Indoor Unit Status LEDs
The Indoor Unit LED functionality is described as follows:
SYSTEM
Green OK, Orange (OU/IU Comms Error), Red (OU/IU Comms
Down)
PAYLOAD
Green OK, Orange (AIS Detected), Red (LOS Detected)
RF LINK
Green OK, Orange (FEC Correcting Errors), Red (FEC unable to
correct errors)