Nortel 1700, Инструкция по установке

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Appendix A Technical specifications 79
Installing the Contivity 1700
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 33 shows the quad
T1/E1 CSU/DSU WAN interface card.
Figure 33 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 commonly sold as Category
5, or Ethernet, cables.
The cables you use should be wired in accordance with EIA-568-A wiring style.
This wiring style ensures that the transmit signal (pins 4 and 5) and the receive
signal (pins 1 and 2) are carried on a twisted pair inside the patch cord. The use of
factory-made patch cords is strongly recommended.
You 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 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. The T1/E1 CSU/DSU crossover cable and the Ethernet crossover cable
are not interchangeable.
For information about the cable pinouts for a crossover connection, see Table 22
on page 78 . For information about the cable pinouts for a straight-through
connection, see Table 23 on page 78 .
Note:
Nortel Networks does not supply cables with the quad T1/E1
CSU/DSU interface card.
CS160012A