Protocol Tabs
485
HP-UNEQ
HPOH Unequipped Payload
. Indicates that a 00h pattern
has been detected in the C2 byte. This byte is being received
from HP terminating equipment. This is an alarm LED.
LP
LPOH Status LED
. Indicates if any of the errors or alarms
within this portion of the overhead are being received. This is
a status LED.
This section is only available when C-2, C-12, or C-11 is
mapped.
TU-AIS
TU Alarm Indication Signal
. Indicates an all-ones
characteristic or adapted information signal was detected on
the TU. It is generated to replace the normal traffic signal
when it contains a defect condition in order to prevent
consequential downstream failures being declared or alarms
being raised. This is an alarm LED.
TU-LOP
TU Loss of Pointer
. Indicates that an invalid Pointer has
been received or a TU Pointer loss has been detected on the
incoming SDH signal. This is an alarm LED.
TU-PTR
TU Pointer Adjustments
. Indicates Pointer offsets or
adjustments between the VC payload and the STM-N frame
are occurring. This is a status LED.
TU-LOM
TU Loss of Multiframe Alignment
. Indicates a Loss of
Multiframe Alignment in the TU. This is an alarm LED.
LP-RDI
LPOH Remote Defect Indication
. Indicates that a remote
alarm is being received from downstream LP terminating
equipment. The V5 byte of the LPOH is used for this
indicator. This is an alarm LED.
LP-RFI
LPOH Remote Failure Indication
. Indicates a defect on the
TU has persisted beyond the maximum time allocated to the
transmission system protection mechanisms. When this
occurs, the RFI is sent to the far end and initiates a LP
protection switch. This is an alarm LED.
LP-REI
LPOH Remote Error Indication
. Indicates to the transmitting
node that an errored block has been detected at the LP
receiving node. This is an error LED.
LP-UNEQ
LPOH Unequipped Payload
. Indicates that an all-zeros
patterns has been detected in the LP Signal Label of the V5
MPA_e_manual_D07-00-129P_RevA00
Summary of Contents for MPA
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