Juniper JUNOSE 10.0.X PHYSICAL LAYER, Руководство по настройке

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Use to generate a yellow alarm when a loss of frame or loss of signal condition
is detected on T1 channels.
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By default, T1 channels generate alarms.
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Example
host1(config-controll)# t1 6,10-14,19 yellow generate
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Use the no version to disable generation of yellow alarms.
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See t1 yellow.
Configuring an HDLC Channel
You must configure an HDLC channel for each group of fractional T1 lines and each
full T1 line.
To configure an HDLC channel, specify a serial interface (for example, HDLC channel
in slot 0, port 1, channel 1, subchannel 5).
host1(config)# interface serial 0/1:1/5
Optional Tasks
The following configuration tasks are optional when you configure an HDLC channel
on a channelized T3 interface:
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Configure the CRC.
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Specify the HDLC idle character.
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Enable data inversion on the interface.
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Set the time interval for monitoring bit and packet rates.
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Set the MRU.
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Set the MTU.
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Assign a text description or an alias to the serial interface.
crc
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Use to configure the size of the CRC.
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The CRC is an error-checking technique that uses a calculated numeric value to
detect errors in transmitted data.
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16 and 32 indicate the number of bits per frame that are used to calculate the
frame check sequence (FCS). Both the sender and receiver must use the same
setting.
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Use a 32-bit CRC when transmitting long streams at fast rates and to provide
better ongoing error detection.
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Example
host1(config-if)# crc 32
20 ■
Configuration Tasks
JUNOSe 10.0.x Physical Layer Configuration Guide