VeEX MPA, User Manual

Page: 373 / 842

Protocol Tabs
373
The following describes the TCM LEDs that appear when the TC Overhead
Processing is configured for either " Enable " or " Path Enable ".
LED Description
TC-IEC-P Tandem Connection-Incoming Error Count. Indicates a B3
error count is being received from downstream TCM
equipment. Bits 1-4 of the Z5 byte are used for this indicator.
This is an error LED.
TC-REI-P 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 Z5 byte is used for
this indicator. This is an error LED.
TC-OEI-P Tandem Connection-Outgoing Error Indication. Indicates that
the unit is sending an OEI error to upstream TCM equipment.
Bit 6 of the Z5 byte is used for this indicator. This is an error
LED.
TC-RDI-P 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 Z5
byte is used for this indicator. This is an alarm LED.
TC-ODI-P 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 Z5 byte is used for
this indicator. This is an alarm LED.
TC-AIS-P Tandem Connection-Alarm Indication Signal. Indicates if IEC
bits 1110 are being received from upstream TCM equipment.
(Bits 1-4 of the Z5 byte are the IEC bits.) This is an alarm
LED.
TC-UNEQ-P Tandem Connection-Unequipped. Indicates that a 00h
pattern has been detected in the Z5 byte of a Tandem
Connection. This is an alarm LED.
TC-LOF-P 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.
The following describes the TCM LEDs that appear when the TC Overhead
Processing is configured for " VT Enable ".
MPA_e_manual_D07-00-129P_RevA00