ADTRAN 1204002L2, TSU IQ+ Wire Switched 56 DBU Card, Isdn DBU Card, PRI DBU Card, DCE Card

Chapter 1. Introduction

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

The V.34 DBU card provides switched backup of the leased line application. This module allows backup data rates of up to

33.6 kbps over the public switched telephone network (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.

PRI DBU Card

The PRI DBU 23 B+D (primary rate interface dial backup) card allows the TSU IQ+ to accept or place up to 23 dial backup calls simultaneously. This card supports 64Kbps data service. Incoming calls will be accepted for 56Kbps or 64Kbps service. Bonding is not supported. Fractional PRI capability is supported.

DCE Card

This module is used to connect a TSU IQ+ to an external DBU device such as an ISDN terminal adapter. The DTR lead is used to control the dial process in this case.

61200275L1-1 TSU IQ+ User Manual 1-7