Frequency Of Fdl Path Messages; Higher-Level Protocols; Platform Considerations - Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - PHYSICAL LAYER CONFIGURATION GUIDE 2010-09-24 Configuration Manual

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Table of Contents

Higher-Level Protocols

Platform Considerations

Table 9: MDL and FDL Message Strings and Message Types (continued)

Message

String

Description

fic

Frame identification code

generator

Generator number

lic

Line identification code

pfi

Facility identification code

port

Equipment port number

unit

Unit identification code

As long as another message of any type containing the same string is received within 10

seconds, the line module retains the local copy of the message string and resets the

10-second timer for that string.

For example, if a line module receives an MDL or FDL test signal message containing an

eic string, and then receives a idle signal message within 10 seconds that also contains

an eic string, it retains the local copy of the most recent eic string received and resets the

10-second timer for that message. However, if 10 seconds pass without the line module

receiving a path identification, test signal, or idle signal message containing an eic string,

the line module erases the local copy of the eic message string.

For message strings that are unique to a particular message type, the line module must

receive another message of the same type containing this string in order to retain the

local copy of the string and reset the timer. For example, if the line module receives a

test signal message containing a generator string and does not receive another test signal

message within 10 seconds, it erases the local copy of the generator string.