User's Manual Part 2

T6T 300 Watt VHF Transmitter Page 92 Installation
T1/E1 Connector
The T1/E1 8-way RJ48 socket is used to:
❑ Connect voice, signalling and RCMS data to a digital network
❑ Connect a Mode 3 network computer
❑ Connect a transmitter and receiver together when the receiver is configured as part of a Mode 2
base station.
The connector pin-out is shown belown and detailed in Table 21.
Table 21 T1/E1 Connector
Pin Signal Characteristic
1 RRing T1 - Balanced 100 ohm (±10%), 1.544 Mbits per
second (±50 ppm), AMI/B8ZS Coding.
E1 - Balanced 120 ohm (±10%), 2.048 Mbits per
second (±50 ppm), AMI/HDB3 Coding.
Protected with 28 V differential and common mode
clamp and 1.25 A fuse in each line.
2RTip
3 Not connected -
4 TRing T1 - Balanced 100 ohm (±10%), 1.544 Mbits per
second (±50 ppm), AMI/B8ZS Coding.
E1 - Balanced 120 ohm (±10%), 2.048 Mbits per
second (±50 ppm), AMI/HDB3 Coding.
Protected with 28 V differential and common mode
clamp and 1.25 A fuse in each line.
5TTip
6 Remote on/off An input that is primarily used by a Park Air E1-RIC
equipment to switch the radio on and off (0 V = off,
5 V = on). For this facility to work, the radio’s rear
panel Supply switch must be set to on and the E1-RIC
must be powered from an external source.
7 Ground 0 V.
8 20 to 35 Vdc (nominally
28 V)
Output supply used to power an E1-RIC.
Pin 1
RJ48 Plug
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.