H3C SR6600 Command Reference Manual

Also see for SR6600 SPE-FWM: Configuration guide Configuration guide Configuration guide Command reference Command reference

3-72Parametersfdl-ansi-llb-down: Sends ANSI-compliant LLB deactivation request code in the FDL to removesloopback.fdl-ansi-llb-up: Sends ANSI-compliant line loopback (LLB) activation request code in the FDL to startremote loopback.fdl-ansi-plb-down: Sends ANSI-compliant PLB deactivation request code in the FDL to removeloopback.fdl-ansi-plb-up: Sends ANSI-compliant payload loopback (PLB) activation request code in the FDL tostart remote loopback.fdl-att-plb-down: Sends AT&T-complaint PLB deactivation request code in the FDL to removeloopback.fdl-att-plb-up: Sends AT&T-complaint PLB activation request code in the FDL to start remote loopback.inband-llb-down: Sends in-band LLB deactivation request code compliant with the ANSI or AT&Timplementation to remove loopback.inband-llb-up: Sends in-band line loopback (LLB) activation request code compliant with the ANSI orAT&T implementation to start remote loopback.DescriptionUse the ft1 sendloopcode command to send remote loopback control code.By default, no remote loopback control code is sent.You may configure loopback on the far-end T1-F interface by sending loopback request code.In LLB mode, all 193 bits (one synchronization bit and 192 effective bandwidth bits) in a T1 PCM frameare looped back. In PLB mode, however, only 192 effective bandwidth bits are looped back.The format of loopback code can be compliant with ANSI T1.403 or AT&T TR 54016.In SF framing, LLB code is sent using the effective bandwidth (slots 1 through 24). In ESF framing, bothLLB code and PLB code are sent/received in the FDL in ESF frames.You can use this command only when the far-end CT1 interface can automatically detect loopbackrequest code from the network.Examples# Send in-band LLB activation request code. system-view[Sysname] interface serial 2/0/0[Sysname-Serial2/0/0] ft1 sendloopcode inband-llb-upft1 timeslot-listSyntaxft1 timeslot-list list [ speed { 56k | 64k } ]undo ft1 timeslot-listViewT1-F interface viewDefault Level2: System level