Description
The TLIU04C1 is a quad line interface containing four line transmit and receive channels for use in both North American (T1/DS1) and European (E1/CEPT) applications. The line interface unit has the same functions as the Lucent T7698.
The device can operate in either of two modes, chosen by the logic state of a control pin. A direct logic control mode provides the ability to define the architecture, initiate loopbacks, and monitor alarms without connecting to a microprocessor by setting the logic levels on control pins. The microprocessor mode uses a parallel microprocessor interface to allow the user to configure the device. The interface is compatible with many commercially available microprocessors. The block diagrams of the microprocessor and direct logic modes are shown in Figure 2 and Figure 25, respectively.

Applications
■ T1/E1 network performance monitoring
■ SONET/SDH multiplexers
■ Asynchronous multiplexers (M13)
■ Digital access cross connects (DACs)
■ Channel banks
■ Digital radio base stations, remote wireless modules
■ PBX interface