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Serial port 128
Models 2603, 2621, and 2635 Getting Started Guide D • IPLink Physical Connectors
E1/T1 (RJ-48C Connector)
The T1/E1 transmit signals are not polarity sensitive, even though they have the traditional designation of Tip
and Ring.
Figure 86. T1/E1 RJ-48C connector
Table 11. T1/E1 Port
Pin No. Signal
1 Receive (Ring)
2 Receive (Tip)
3 Shield (Receive)
4 Transmit (Ring)
5 Transmit (Tip)
6 Shield (Transmit)
7
8
12345678
RX RX TX TX