Nortel Networks 1750 manual Quad T1/E1 CSU/DSU WAN interface card

Appendix A Technical specifications 89

The following table provides the T1/E1 CSU/DSU cable pinouts for a straight-through connection.

Table 30 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

Quad T1/E1 CSU/DSU WAN interface card

The quad T1/E1 CSU/DSU WAN interface card has four connectors that provide the signals to interface to T1 or E1 equipment. The following figure shows the quad T1/E1 CSU/DSU WAN interface card.

Figure 31 Quad T1/E1 CSU/DSU WAN interface card

CS160012A

Each connector on the quad T1/E1 CSU/DSU WAN interface card accommodates an 8-pin RJ-48 modular patch cord. These cables are commonly sold as category 5, or Ethernet, cables.

Note: Nortel does not supply cables with the quad T1/E1 CSU/DSU interface card.

Nortel VPN Router Installation — VPN Router 1750