Nortel Networks 2700 User Manual

  Appendix A  Technical specifications

NN46110-311 02.01

The 56/64K CSU/DSU WAN interface card has a single RJ-48 connector that 
provides the signals needed to interface to network equipment. 

 shows 

the 56/64K CSU/DSU WAN interface card.

56/64K CSU/DSU WAN interface card

The connector on the 56/64K CSU/DSU WAN interface card accommodates an 
8-pin RJ-48 modular patch cord. These cables are sold as Category 5, or Ethernet, 
cables.

Use cable that is wired in accordance with EIA-568-A wiring style. This wiring 
style ensures that the transmit signal (pins 1 and 2) and the receive signal (pins 7 
and 8) are carried on a twisted pair inside the patch cord. Nortel strongly 
recommends that you use factory-made patch cords.

You connect the 56/64K CSU/DSU WAN interface card to the service provider 
network using a straight-through cable or a crossover cable, depending on how the 
service provider wired its jack.

•

For a straight-through connection, you can use a standard Category 5 
(Ethernet) straight-through cable.

•

For a crossover connection, you cannot use a standard Category 5 crossover 
cable. Do not interchange the 56/64K CSU/DSU crossover cable and the 
Ethernet crossover cable.

 provides the 56/64K CSU/DSU cable pinouts for a crossover 

connection.

Note: Nortel does not supply an interface cable with the 

 

56/64K CSU/DSU WAN interface card.

56/64K

DDS