Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 439
pplm — reports a path payload mismatch, which places the channel operationally down.
When configured, path payload mismatch alarms are raised but not cleared.
Default path payload mismatch alarms are issued
prei — reports a path error condition raised by the remote end as a result of b3 errors
received from this node. When configured, path error alarms are raised but not
cleared. (This parameter is not supported on the 4-port OC3/STM1 card.)
Default path error alarms are not issued
puneq — reports path unequipped errors
Default path unequipped alarms are issued
scramble
Syntax [no] scramble
Context config>port>sonet-sdh>path
Description This command enables SONET/SDH payload scrambling on a 4-port OC3/STM1 Clear
Channel Adapter card.
Scrambling randomizes the pattern of 1s and 0s carried in a SONET frame. Scrambling, or
rearranging, the pattern prevents continuous strings of all 1s or all 0s and meets the needs
of physical layer protocols that rely on sufficient transitions between 1s and 0s to maintain
clocking.
For ATM, this command enables or disables ATM cell-level payload scrambling or
descrambling using the x43+1 polynomial as defined in ITU-T I.432.1. Scrambling is enabled
by default for the ATM path or channel. This scrambling is done in addition to SONET/SDH
frame scrambling or descrambling, which is always enabled in the framer.
The no form of this command disables scrambling.
Default scramble
signal-label
Syntax signal-label value
no signal-label
Context config>port>sonet-sdh>path
Description This command sets the C2 byte value. The purpose of this byte is to communicate the
payload type being encapsulated by SONET framing.
Default 0xcf
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