Juniper JUNOSE 10.0.X PHYSICAL LAYER, Configuration Manual

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Use to configure the size of the CRC.
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Specify the number of bits per frame (16 or 32) that are used to calculate the
frame check sequence (FCS). Both the sender and receiver must use the same
setting.
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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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A 32-bit CRC should be used to protect longer streams at faster rates and,
therefore, provide better ongoing error detection.
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Example
host1(config-if)# crc 32
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Use the no version to restore the default value, 16.
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See crc.
idle-character
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Use to configure the HDLC idle character.
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The idle character is sent between HDLC packets.
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Specify one of the following idle characters:
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flags— Sets the idle character to 0x7E
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marks —Sets the idle character to 0xFF
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Example
host1(config-if)# idle-character marks
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Use the no version to restore the default value, 0x7E (flags).
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See idle-character.
interface serial
Use to configure a serial interface in the slot/port format.
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slot —Number of the slot in which the line module resides in the chassis
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port —Number of the port on the I/O module
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Example
host1(config)# interface serial 3/0
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Use the no version to disable the interface.
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See interface serial.
invert data
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Use to enable data stream inversion for the interface.
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Enable data stream inversion only if it is turned on at the other end of the line.
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Configuration Tasks
JUNOSe 10.0.x Physical Layer Configuration Guide