VeEX MPA User Manual page 488

MPA_e_manual_D07-00-129P_RevA00
HP-TC-AIS
HP-TC-UNEQ
HP-TC-LOF
The following describes the TCM LEDs that appear when the TC Overhead
Processing is configured for "LP Enable".
LED
LP-TC-BIP
LP-TC-REI
LP-TC-OEI
LP-TC-RDI
LP-TC-ODI
LP-TC-AIS
Tandem Connection-Alarm Indication Signal. Indicates if IEC
bits 1110 are being received from upstream TCM equipment.
(Bits 1-4 of the N1 byte are the IEC bits.) This is an alarm
LED.
Tandem Connection-Unequipped. Indicates that a 00h
pattern has been detected in the N1 byte of a Tandem
Connection. This is an alarm LED.
Tandem Connection-Loss of Frame. Indicates the loss of a
valid multiframe frame alignment signal (FAS) pattern from
upstream TCM equipment. This is an alarm LED.
Description
Tandem Connection-Bit Interleaved Parity error. Indicates a
BIP error count is being received from downstream TCM
equipment. Bits 1-2 of the N2 byte are used for this indicator.
This is an error LED.
Tandem Connection-Remote Error Indication. Indicates that
an error has occurred at the downstream TCM equipment.
The unit is receiving an error. Bit 5 of the N2 byte is used for
this indicator. This is an error LED.
Tandem Connection-Outgoing Error Indication. Indicates that
the unit is sending an OEI error to upstream TCM equipment.
Bit 6 of the N2 byte is used for this indicator. This is an error
LED.
Tandem Connection-Remote Defect Indication. Indicates that
a defect has occurred at the downstream TCM equipment.
The unit is receiving an alarm. Bit 8 in multiframe 73 of the
N2 byte is used for this indicator. This is an alarm LED.
Tandem Connection-Outgoing Defect Indicator. Indicates that
the unit is sending an ODI alarm to upstream TCM
equipment. Bit 7 in multiframe 74 of the N2 byte is used for
this indicator. This is an alarm LED.
Indicates that the unit is sending an AIS alarm to upstream
TCM equipment. Bit 4 of the N2 byte is used for this indicator.
This is an alarm LED.
SDH Tab
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