Rj-48 T1/E1 Port Pinouts; Figure 40. Rj-48 Connector And Port Pin Layout; Table 23. Rj-48 Pin Signals - Allied Telesis AT-CM20x Series Reference Manual

RJ-48 T1/E1 Port Pinouts

Figure 40 illustrates the pin layout to an RJ-48 connector and port.

Figure 40. RJ-48 Connector and Port Pin Layout

Table 23 lists the RJ-48 pin signals.
Pin
1
2
4
5
Note
TDM(T1/E1) Transport over fiber operates point-to-point between
two AT-CM70S modules across fiber; and there is an auto-discovery
process at power-ON which detects the presence of an AT-CM70S
at the remote end.
Converteon Media Converter Line Cards Reference Guide
8
8
1

Table 23. RJ-48 Pin Signals

Receive Ring (RX, Ring, -)
Receive Tip (RX, Tip, +)
Transmit Ring (TX, Ring, -)
Transmit Tip (TX, Tip, +)
1
Signal
91