Alcatel 1850 TSS-320 Technical Handbook page 76

• High Order Path Overhead Monitoring Function (POM): Snm_TT
Snm_TT_Sk
J1: Path Trace information is recovered.
G1[1-4]:The REI information is recovered.
G1[5-7]:Path Status monitoring detection --> G1[5] is used for HP-RDI detection;
G1[6-7] is optionally used for HP-RDI coding enhancement.
C2: Signal Label Monitoring --> UNEQ and VC-AIS detection.
B3: VC-4 BIP-8 Errored Block Count.
TSF insertion (on SSF or UNEQ or TIM or AIS detection).
TSD insertion (on a condition of degraded signal detection).
• High Order Supervisory Unequipped Termination (HSUT): Sns_TT
Sns_TT_Sk
J1:
G1[1-4]:The REI information is recovered.
G1[5]:Path Status monitoring detection --> G1[5] is used for HP-RDI detection;
G1[6-7] is optionally used for HP-RDI coding enhancement.
C2: Signal Label Monitoring --> UNEQ and VC-AIS detection.
B3: VC-4 BIP-8 Errored Block Count.
Sns_TT_So
Generation of an unequipped container and frame offset.
C2: "unequipped" insertion.
J1: trail trace identifier is generated.
G1: insertion of RDI and/or REI information.
B3: VC-4 Bip-8 calculation and insertion.
• VC-4 Tandem Connection Trail Termination: SnD_TT
For Sonet tributaries the function is not applied.
For SDH VC-4 tributaries, the follow applies, according to G.707 Annex D (G.707 Annex C
option is not supported):
SnD_TT_Sk
N1[1-4]:VC-4 BIP-8 extraction and EDC calculation.
N1[8][73]:RDI extraction.
N1[5]:
N1[7][74]:ODI extraction (Outgoing Defect Indication).
N1[6]:
N1[7-8]: extraction from the multiframed channel N1[7-8] of:
B3:
SnD_TT_So
N1[8][73]:RDI insertion.
N1[5]:
N1[7][74]:ODI insertion (Outgoing Defect Indication).
N1[6]:
N1[7-8]: insertion in the multiframed channel N1[7-8] of:
N1[1-4]: BIP-8 calculation and insertion.
Alcatel 1850 TSS-320 Rel. 1.1
74/270 8DG 07734 AAAA Edition 01
Path Trace information is recovered.
REI extraction.
OEI extraction (Outgoing Error Indication).
FAS (Frame Alignment Signal) in frames 1 to 8.
trace identifier in frames 9 to 72.
TC RDI and ODI in frames 73 to 76.
BIP-8 compensation.
REI insertion.
OEI insertion (Outgoing Error Indication).
FAS (Frame Alignment Signal) in frames 1 to 8.
trace identifier in frames 9 to 72.
TC RDI and ODI in frames 73 to 76.
Technical Handbook Common
Functional Description