Alternative Mapping Table; Xcon Screen - Amt Options - Zhone IMACS 8000 User Manual

System Configuration and Operation
Selecting 'O' from the XCON screen for the amt Options takes the user to the Alternative
Mapping Table (AMT) feature, as described in the following section.
Included in the feature changes are associated syslog events. See "SYSLOG" on page 24. for
new syslog events related to the ATMT feature.

5.34.2 Alternative Mapping Table

The Alternative Mapping Table (AMT) feature allows for a secondary configuration to be
prepared and ready in case of a deemed system emergency which requires the IMACS traffic
and services to be reconfigured. The concept behind this is that in a normally functioning
environment the IMACS will carry a maximum of eight T1 or E1 facilities to the far-end. In
an emergency, perhaps only two T1 or E1 facilities are 'guaranteed' by the service provider.
The AMT feature allows for critical services and customers to be reconfigured to use these
'emergency' facilities. The AMT feature assumes that the far-end circuit will be mapped
differently as well, as both ends must switch to an alternate map for the feature to be effective.
There are two methods to create an AMT MAP. The non-service affecting method uses the
tool REMOTE AMT with a second remote node required to setup the alternative map. A
database backup of the original node being configured is captured and edited on the remote
shelf for use in an emergency by using the rEtrieve option. The database backup is loaded and
the cross-connections are manually changed in order to set up the AMT MAP using normal,
IMACS provisioning functions. This edited database is then transferred back to the original
node via tftp.
The second, service-affecting setup for the AMT MAP feature is by using ACTIVE AMT to
create the AMT MAP. This method offers the benefit of making alterations to an existing
customer configuration or to a pre-existing AMT MAP. To use this option, start by using the
Copy option to create an AMT MAP that is an exact duplicate of the currently running
configuration. The user would then manually switch to this new backup configuration, and
then make any changes to the configuration to be used in an emergency or AMT active
Reference Guide
Figure 5-91.Xcon Screen - amt Options
System Redundancy
5-109