Nortel Networks 1750 Manual Do Utilizador

90 Appendix A Technical specifications

NN46110-316 03.01

Use cable that is wired in accordance with EIA-568-A wiring style. This wiring 
style ensures that a twisted pair inside the patch cord carries the transmit signal 
(pins 4 and 5) and the receive signal (pins 1 and 2). nortel strongly recommends 
that you use professionally manufactured patch cords.

Connect the quad T1/E1 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 the 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 T1/E1 CSU/DSU crossover cable and the 
Ethernet crossover cable.

For information about the cable pinouts for a crossover connection, see 

. For information 

about the cable pinouts for a straight-through connection, see 

The V.90 modem interface card has two RJ-11 connectors that provide the signals 
to interface to an incoming telephone line and to telephone equipment. The 
following figure shows the V.90 modem interface card.

Figure 32   V.90 modem interface card

Included in the accessory box is a 7-foot RJ-11 cable to attach to a telephone jack.

PHONE

LINE