User Guide

96 Appendix A Technical specifications
NN46110-318 02.01
Table 31 provides the T1/E1 CSU/DSU cable pinouts for a straight-through
connection.
Quad T1/E1 CSU/DSU WAN interface card
The quad T1/E1 CSU/DSU WAN interface card has four connectors that provide
the signals needed to interface to T1 or E1 equipment. Figure 41 shows the quad
T1/E1 CSU/DSU WAN interface card.
Figure 41 Quad T1/E1 CSU/DSU WAN interface card
Each connector on the quad T1/E1 CSU/DSU WAN interface card accommodates
an 8-pin RJ-48 modular patch cord. These cables are sold as Category 5, or
Ethernet, cables.
Table 31 T1/E1 CSU/DSU cable pinouts for straight-through connection
Nortel termination Remote termination
Signal Pin # to Pin # Signal
Receive A (RXDA) 1 1 Receive A (RXDA)
Receive B (RXDB) 2 2 Receive B (RXDB)
not used 3 3 not used
Transmit B (TXDB) 4 4 Transmit B (TXDB)
Transmit A (TXDA) 5 5 Transmit A (TXDA)
not used 6 6 not used
not used 7 7 not used
not used 8 8 not used
Note: Nortel does not supply cables with the quad T1/E1 CSU/DSU
interface card.
CS160012A