Cabletron Systems EMM-E6 Ethernet - Manual (Page 80)

CONNECTING TO THE NETWORK
EMM-E6 User’s Guide 3-19
3.9.1 Connecting a Twisted Pair Segment to an EPIM-T
Before connecting a segment to the EPIM-T, check each end of the
segment to determine wire cross-over. If the wires do not cross over, use
the switch on the EPIM-T to internally cross over the RJ45 port. Refer to
Figure 3-10 to properly set the EPIM-T cross-over switch.
Figure 3-10. EPIM-T Cross-over Switch
To connect an EPIM-T to a Twisted Pair Segment:
1. Connect the twisted pair segment to the module by inserting the RJ45
connector on the twisted pair segment into the RJ45 port on the
module. (See Figure 3-10.)
To establish link, you must have an odd number of cross-overs
(preferably one) between 10BASE-T devices of the same type
(i.e., from repeater to repeater or transceiver to transceiver).
NOTE
Position =
(not crossed over)
1. TX+
2. TX-
3. RX+
4. NC 5. NC
6. RX-
7. NC
8. NC
Position X
(crossed over)
1. RX+
2. RX-
3. TX+
4. NC 5. NC
6. TX-
7. NC
8. NC
CH1Book Page 19 Wednesday, March 20, 1996 7:48 AM