Alcatel Carrier Internetworking Solutions 1000 ADSL Subscriber Line Interface, Ethernet Interface

Subscriber Line Interface

The ADSL access network provides two types of traffic over a single metallic twisted-pair:

∙Data encapsulated in Asynchronous Transfer Mode (ATM) cells.

∙Voice connections (regular telephone service).

These two traffic types are combined on the single twisted-pair by means of the Frequency Division Multiplexing (FDM) technique.

To maintain your normal phone service, a remote splitter must be installed first (see figure 19).

Note:

Existing in-home telephone wiring varies greatly in its installation. For most Internet service applications, existing in-home wiring provides adequate performance for the ADSL modem. Improved performance is obtained from unshielded twisted pair Category 5 cable between the remote splitter and the ADSL modem.

After installing the remote splitter, connect the modem connector marked LINE to the phone jack.

Voice and Data

Data

Remote

Splitter

ADSL

VoiceModem

Figure 19. Subscriber Line Interface to Remote Splitter

Ethernet Interface

The Ethernet port, available on some ADSL models, is a 10BASE-T interface of type MDI-X.

When the terminal equipment is correctly connected to the ADSL modem, the visual indicator, marked 10BASE-T, will be solid green. This indicates that the wiring between the modem and the PC is correct. If not, check the cable layout.