User Manual

MDR2400/5800-SR, Orion2410/5810-SRi and Orion 5825-SR

862-01881 Issue 12c Page 34

4.2.5 Balanced Payload Data : RJ48

1. Assemble the T1 / E1 payload data input and output cable. See the table below

for Digital Indoor Unit connector pin assignments.

2. Connect the payload data cables to the RJ48 connectors (numbered 1-8 for tribs

1-8) on the front panel of the Digital Indoor Unit.

Standard termination of this port is 110 Ohms. On the Orion10 and Orion25, 75 Ohms

termination is available on request (please contact the factory).

It is recommended to use a cable that connects to pin 1,2,4, and 5 only since the other

pins on the RJ48 are not used to transfer data.

NOTE Rx implies IN (signal expected to go INTO the interface), Tx implies RFUT

(signal coming out of the interface)

RJ48C Socket Pin Description Direction

1 R (Ring 1) TX

T (Tip 1)

3,6 50 Ohm terminated N/A

4 R1 (Ring) RX

5 T1 (Tip) RX

1 8

7,8 No Connection N/A

NOTE Use Twisted Pair Cable conductors for pins: 1 & 2, 3 & 6 and 4 & 5.

4.2.6 Unbalanced Payload Data : BNC

One of the variants of the MDR Digital Indoor Unit has a set of 75 Ohm BNC’s on the

front panel as well as the DB25 connector.

• Rx implies IN (signal expected to go INTO the interface)

• Tx implies RFUT (signal coming RFUT of the interface)

NOTE Tribs are numbered 0-3 on the front panel, but are called 1-4/1-8 in the NMS /

GUI.

4.2.7 Connecting Auxiliary In/Out (Optional)

The auxiliary in/out port is used to:

• Monitor switch-closure events using two isolated inputs.

• Control line connections using normally-open and normally-closed relay outputs.

Connect the port:

1. Assemble an auxiliary in/out cable using a 15 way D-type male connector

according to connector pin assignments shown in Table 12.