Chapter 7 Redundant Configurations; Figure 41. Fiber Path Redundancy - Canoga Perkins EdgeAccess Universal Chassis System 2361 T1 User Manual

The EdgeAccess Universal Chassis System
Chapter 7
Redundant Configurations
For critical circuits where downtime cannot be tolerated, redundant configurations are used. In a
redundant configuration a secondary (inactive), circuit is ready to begin transmitting data. Should
there be a problem on the active circuit. For example, if the system detects loss of signal, the
secondary circuit will take over the actual data payload. Personnel can freely troubleshoot the
problem without disrupting data transmission.
To ensure that the inactive circuit is truly ready to begin transmitting data at any time, a data
stream is continually sent through the inactive modem, and its error rate is continually tested.
There are two types of redundancy:
Fiber Path Redundancy: Allows two pairs of fibers to be connected to the optional redundant
T1 or E1
ELIM
OLIM, as shown in Figure 42. Notice these OLIMs each have two
pairs of Tx and Rx connectors.
Primary Fiber
Pair
OLIM
Secondary Fiber
Pair

Figure 41. Fiber Path Redundancy

2361 Modem Users Manual
ELIM
OLIM
T1 or E1
7-1