Chapter 1. Introduction1-6 TSU User Manual 61200060L1-1Network InterfaceThe Network Interface (NI) port complies with the applicableANSI and AT&T standards.NI• AMI or B8ZS coding• Automatic or manual line build out• D4 or ESF framing• Network performance monitoring and reporting• Test loopbacks by local and remote• Extensive self testNx56/64 Serial Interface• Data rates: N*56k or N*64k, where N=1 to 24 (DS0s)• Inverted data (Inverted HDLC)• A V.35 interface• Standard V.35 connectors• Test loopbacks with 511 pattern generation and check• Extensive self testControl Port Input• EIA-232 input from a PC or a modem for control of theTSU• Chain input from another TSU• Up to 9600 baud operation• Acts as input for PC proxy agent control or as input for achained connectionChain Por t Output• EIA-232 output to chain control to other TSUs• Up to 9600 baud operation• Automatic setup; no user input required
