Specifications

22 AT-9900 Series Switch

C613-03084-00 REV A

1000BASE crossover cable

For 1000BASE test cables, all four pairs are used and the cable is wired in either

a crossover or straight-through configuration. Table 1-7 on page 22 lists the pin

assignments for a crossover cable.

Port, Connector, and Cable Combinations

The cable guidelines for each switch model are shown below.

1. Refer to the IEEE 802.3 standards for further cable information.

Table 1-7: Pin assignments, 10/100/1000BASE-T RJ-45 four pair crossover cable

End 1 End 2

Pin Pair Pin Pair

1 Pair 1+ 1 Pair 2+

2 Pair 1- 2 Pair 2-

3 Pair 2+ 3 Pair 1+

6 Pair 2- 6 Pair 1-

4 Pair 3+ 4 Pair 4+

5 Pair 3- 5 Pair 4-

7 Pair 4+ 7 Pair 3+

8 Pair 4- 8 Pair 3-

Table 1-8: Cable guidelines for AT-9900 Series switches

Model Port Type Connector Type Cable Type

Maximum Cable Length

AT-9924T/4SP

AT-9924T

10BASE-T

100BASE-TX

1000BASE-T

RJ-45 CAT5

CAT5E

120 m Max

AT-9924T/4SP

AT-9924T

AT-9924SP

1000BASE-X Varies with SFP Refer to SFP user

documentation

packaged with SFP

Refer to SFP user

documentation packaged

with SFP