3Com MSR 50, MSR 30 manual 277

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data: Sets information included in MDL messages. Among all types of information, EIC, LIC, FIC, and unit are defined for all types of MDL messages; PFI is only for path MDL messages; port number is only for idle signal messages; and generator number is only for test signal messages.

eic string: Equipment identification code, a string of 1 to 10 characters. The default EIC is line.

lic string: Location identification code, a string of 1 to 11 characters. The default LIC is line.

fic string: Frame identification code, a string of 1 to 10 characters. The default FIC is line.

unit string: Unit, a string of 1 to 6 characters. The default unit is line.

pfi string: Path facility identification, a string in the range 1 to 38 characters. The default PFI is line.

port-nostring: Port number, a string in the range 1 to 38 characters. The default port number is line.

gen-nostring: Generator number, a string of 1 to 38 characters. The default generator number is line.

generate: Sends specified information with MDL messages, which can be path, idle signal, and/or test signal regularly.

Description Use the mdl command to configure MDL message detection/sending on the CT3 interface.

Use the undo mdl command to remove the MDL settings.

Use the undo mdl detect command to disable the CT3 interface to detect MDL messages.

Use the undo mdl generate command to disable the CT3 interface to send MDL messages.

Use the undo mdl data command to restore the default.

MDL is a channel formed by using the three C-bits in the fifth subframe in C-bit framing. According to ANSI T1.107a, it is used to transmit three types of maintenance messages, path, idle signal, and test signal, and its data frame format is LAPD.

At the startup of your router, MDL message detection and sending are disabled on CT3 interfaces and the default MDL message information applies.

Example # Enable MDL detection on CT3 interface T3 2/0.

<Sysname> system-view

[Sysname] interface t3 2/0

[Sysname-T3 2/0] mdl detect