Carrier Access 1750 user manual Module Redundancy, Protection Definitions

Configuration

Module Redundancy

Module Redundancy

Protection Definitions ... 7-25

NIM Redundancy ... 7-26

SAM Redundancy ... 7-29

CPU Redundancy ... 7-33

Protection Definitions

Automatic protection switching (APS) is performed in accordance with specifications except as noted. The following definitions are provided to clarify the terms used in NIM redundancy.

Item	Definition
APS	Automatic Protection Switching
Reverting	After redundancy switching, the system will switch back to
	the original primary NIM when repairs are completed.
Non-	After redundancy switching, the protection NIM will
reverting	remain the system primary NIM after repairs are completed.
	In this case, the repaired NIM becomes the protection NIM.
	This only applies to manual switching.
1+1	The signal is continuously bridged to the working and
Protection	protection equipment so payloads are transmitted
	identically over both paths. The receiving equipment
	chooses either path. The user must set their equipment to bi-
	directional. The Broadmore 1750 supports bi-directional
	1+1 APS for the NIM. The Broadmore 1750 does not
	support uni-directional 1+1 APS for the NIM.
1:n	There is one backup for n critical components. Any of the n
Protection	working channels can be bridged to a single protection line.

Broadmore 1750 - Release 4.6 7-25