Acterna ANT-5 - Page 167

Appendix G – Glossary
Acterna ANT-5 Page 167
ESF Extended Super Frame
ES, ESR Errored Second, Errored Second Ratio
F1 User channel, e.g. for operational service purposes (RSOH)
F2 Path user channel for an end-to-end connection (POH)
FAS Frame Alignment Signal
FTP File Transfer Protocol
G1 End-to-end path status (POH)
GFC Generic Flow Control
GUI Graphical User Interface
H1 Pointer byte 1: Bit nos. 1 to 4: New data flag; bit nos.5, 6:
(Unspecified); bit nos. 7, 8: Pointer value (highest 2 bits)
H2 Pointer byte 2: Pointer value (lowest 8 bits)
H3 Pointer byte 2: Negative justification opportunity
H4 Payload indication (POH)
HCOR Correctable header errors
HEC Header Error Control
HUNC Uncorrectable header errors
HP Higher-order Path
IS, ISM In-Service, In-Service Measurement
ISDN Integrated Services Digital Network
ISO International Standardisation Organisation
J0 Regenerator section trace (RSOH)
J1 Path trace (POH in VC-3, VC-4)
J2 Path trace (POH in VC-12)
K1, K2 APS channels for APS sig. & back-up line switching (MSOH)
K3, K4 APS channels for APS sig. & back-up line switching (POH)