Cisco D9858 Installation And Configuration Manual page 30

Chapter 1 Introduction
For example, the disaster recovery is configured as follows:
Program
Entry
PE1
PE2
When disaster occurs, the transcoder will tune to channel 11, as defined on the
Backup 1 transport.
If the acquisition is successful on the backup 1 transport (PAT is received), the
transcoder will set PE 1 to channel 11 and PE2 to channel 12 and declare that the
disaster is over.
If the acquisition fails or there is no signal lock on the backup 1 transport, the
transcoder will continue to search for the next backup transport for PE1 (Backup 2
transport). If the acquisition is successful on the backup 2 transport, the transcoder
will set PE1 to channel 101, but leave PE2 to channel 2 because PE2 is not specified
for Backup 2 transport.
If the acquisition fails or there is no signal lock on the backup 2 transport, it will
continue the search path and set PE1 to channel 801 and PE2 to channel 1005 if the
acquisition is successful on the backup 3 transport. However, if the acquisition fails
or there is no signal lock on the backup 3 transport, the search path will continue to
the origin transport. The search path will cycle through origin, backup 1, backup 2,
and backup 3 infinitely.
The search path is shown in the Disaster Recovery Status information on the front
panel and web GUI.
By default, the disaster recovery is enabled. To set up and view the disaster recovery
parameters using the front panel, see Setup Menu: DR (on page 123) and Status
Menu: DR (on page 54). To set up and view the disaster recovery parameters using
the web GUI, see Configuring the Disaster Recovery Settings (on page 157) and
Viewing the Disaster Recovery Status (on page 161).
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Origin Transport Backup 1
Channel Number Transport
Channel
Number
101 11
2 12
Backup 2 Backup 3
Transport Transport
Channel Channel
Number Number
101 801
– 1005