NETGEAR XM128 ISDN Reference Manual page 140

Reference Guide for the Model XM128 ISDN Digital Modem
Table E-1 lists the pin assignments for the RJ-45 plug and RJ-45 connector for the S/T interface.
Table E-1. RJ-45 plug and RJ-45 connector pin assignments for the S/T interface
Pin Assignment
1 Not connected
2 Not connected
3 RCV +
4 XMT +
5 XMT -
6 RCV -
7 - 48V
8 - 48V RTN
Table E-2 lists the pin assignments for the RJ-45 plug and RJ-45 connector for the U interface.
Table E-2. RJ-45 plug and RJ-45 connector pin assignments for the U interface
Pin Assignment
1 Not connected
2 Not connected
3 Not connected
4 Ring
5 Tip
6 Not connected
7 - 48V
8 - 48V RTN
E-2 Connector Pin Assignments