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Section TIM (Section Trace Identifier Mismatch)
Section trace identifier mismatch.
Detection: See Section 3.6.
Termination: See Section 3.6.
Section TIU (Section Trace Identifier Unstable)
Section trace identifier unstable.
Detection: See Section 3.6.
Termination: See Section 3.6.
Line AIS (Line Alarm Indication Signal)
Line alarm indication signal. Detects occurrence of Line AIS in unit of transmission source (upstream).
Detection: If frames with K2 byte (bits 6 to 8) being "111" are received n times continuously
Termination: If frames with K2 byte (bits 6 to 8) not being "111" are received n times continuously
* n = 3 or 5. This can be selected by using the LAISDT bit of the MDLOHR register. In the default mode, n = 5.
Line RDI (Line Remote Defect Indication)
Line remote reception failure information. Indicates detection of line reception failure (LOS, LOF, or Line AIS) in unit of
transmission destination (downstream).
Detection: If frames with K2 byte (bits 6 to 8) being "110" are received n times continuously
Termination: If frames with K2 byte (bits 6 to 8) being other than "110" are received n times continuously
* n = 3 or 5. This can be selected by using the LRDIDT bit of the MDLOHR register. In the default mode, n = 5.
PSBF (Protection Switching Byte Failure)
Protection switching byte failure.
Detection: See Section 3.4.4.
Termination: See Section 3.4.4.
SD (Signal Degrade)
Signal degrade.
Detection: Section 3.4.5.
Termination: Section 3.4.5.
SF (Signal Failure)
Signal failure.
Detection: Section 3.4.5.
Termination:
Section 3.4.5.
LOP (Loss Of Pointer)
Pointer error detection.
Detection: See (3) in Section 3.1.2.
Termination:
See (3) in Section 3.1.2.
Path AIS (Path Alarm Indication Signal)
Path alarm indication signal. Detects occurrence of Path AIS in unit of transmission source (upstream).
Detection: See (3) in Section 3.1.2.
Termination:
See (3) in Section 3.1.2.
CHAPTER 3 FUNCTIONAL OUTLINE
Table 3-14. Alarms and Failures (2/4)
PRELIMINARY
NEC confidential and Proprietary
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