ADTRAN 1200212L1, User Manual

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Chapter 1. Introduction
1-6 DSU IQ User Manual 61200212L1-1
INTERFACE CARD OPTIONS
Ethernet Card
This option card connects to an ethernet LAN, providing
communication of management traffic between the LAN and the
DSU IQ.
4-Wire Switched 56 DBU Card
This dial-up 4-wire SW56 card allows you to pay for data
connection only for the time the unit is active. The regional
operating companies provide the 4-wire local loop service to SW56
customers. The 4-wire SW56 DBU card is compatible with AT&T
Accunet and Sprint SW56 type services.
V.34 DBU Card
This module backs up the leased line application at data rates up to
33.6 kbps over the PSTN.
ISDN DBU Card
The ISDN 1B+D card supports a U-interface to the Basic Rate ISDN
and is compatible with National ISDN and AT&T DMS. 1B+D Basic
Rate ISDN service provides a switched 56/64 kbps circuit.
DCE Card
This module connects an external DCE device to the DSU IQ for the
purpose of using an external DSU/CSU to support access rates up
to 512 kbps. The DCE card is inserted into the DBU card slot, but it
is not used for dial backup.