R0106-HP MSR Router Series Interface Command Reference(V7)

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ft1 sendloopcode
Use ft1 sendloopcode to send remote loopback control code.
Syntax
ft1 sendloopcode { fdl-ansi-llb-down | fdl-ansi-llb-up | fdl-ansi-plb-down | fdl-ansi-plb-up |
fdl-att-plb-down | fdl-att-plb-up | inband-llb-down | inband-llb-up }
Default
No remote loopback control code is sent.
Views
T1-F interface view
Predefined user roles
network-admin
Parameters
fdl-ansi-llb-down: Sends ANSI-compliant LLB deactivation request code in the FDL to remove the remote
loopback.
fdl-ansi-llb-up: Sends ANSI-compliant line loopback (LLB) activation request code in the FDL to start
remote loopback.
fdl-ansi-plb-down: Sends ANSI-compliant PLB deactivation request code in the FDL to remove the remote
loopback.
fdl-ansi-plb-up: Sends ANSI-compliant payload loopback (PLB) activation request code in the FDL to start
remote loopback.
fdl-att-plb-down: Sends AT&T-complaint PLB deactivation request code in the FDL to remove the remote
loopback.
fdl-att-plb-up: Sends AT&T-complaint PLB activation request code in the FDL to start the remote loopback.
inband-llb-down: Sends in-band LLB deactivation request code compliant with the ANSI or AT&T
implementation to remove the remote loopback.
inband-llb-up: Sends in-band line loopback (LLB) activation request code compliant with the ANSI or
AT&T implementation to start the remote loopback.
Usage guidelines
You can configure loopback on the remote T1-F interface by sending a loopback request code.
In LLB mode, all 193 bits (one synchronization bit and 192 effective payload bits) in a T1 PCM frame are
looped back. In PLB mode, however, only 192 effective payload bits are looped back.
The format of the loopback code is compliant with ANSI T1.403 or AT&T TR 54016.
In SF framing, LLB code is sent using the effective bandwidth (timeslots 1 through 24). In ESF framing,
both LLB code and PLB code are sent and received in the FDL in ESF frames.
You can use this command only when the remote T1-F interface can automatically detect loopback
request code from the network.
Examples
# Send in-band LLB activation request code.
<Sysname> system-view