System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
SNCP Sub-Network Connection Protection
Aastra Proprietary Information Page 3-19
SNCP can be configured for the following VC levels:
•VC-4,
•VC-3,
• VC-12.
SNCP features
• Traffic signals are transmitted redundantly;
• SNC/I (inherent), SNC/N (non-intrusive);
• Single-ended switching (switchover takes place in the receiver only);
• Unidirectional/bidirectional;
• Non-revertive switching (no automatic reversion) or revertive switching
(automatic reversion);
• Manual switchover;
• Switching criteria: Signal Fail SF, Signal Degrade SD;
• No extra traffic possible.