Alcatel Carrier Internetworking Solutions 1000 ADSL Crossover Cable Layout, ATMF-25 Interface

Crossover Cable Layout

ADSL Modem

1

Receive Twisted-Pairs

2

3

Transmit

6

MDI-X Port

Hub

1

Receive

2

3

Transmit

6

MDI-X Port

Figure 23. MDI-X to MDI-X External Crossover

ATMF-25 Interface

The ATMF port, available on some ADSL models, is an ATMF-25 interface. The interconnection between the ATM Forum equipment and the ADSL modem must always be made with a straight-throughcable (the ATMF-25 interface of the modem is ATM network equipment and most ATMF-25 PC-NIC cards are ATM end equipment).

A single PC with an ATM Forum card can be connected directly to the ATMF interface of the ADSL modem (see figure 24).

ATM Network

ADSL

Modem

Remote

Splitter

ATMF

Figure 24. ADSL Modem with ATMF Interface

When the terminal equipment is correctly connected to the ADSL modem, the visual indicator, marked ATMF-25, will be solid green. This indicates that the wiring between the ADSL modem and the PC is correct. If not, check the cable layout.