Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 52)

T1 Dial Backup Option Overview
5-4 Verilink
OR:
2. ASC is received continuously for 5 seconds by the
DIU 2130/DBU from the far-end Office Channel Unit-Data
Processor (OCU-DP) when a far-end 56 kbit/s DSU circuit fails.
Upgrading to the T1 Dial Backup Option
This section describes how to install your option depending on
which of the available configurations you have. This section also
describes how you configure your T1 Dial Backup Option for
operation and management.
NOTE: To make use of the option, you need AM2000 Release 3.2A or
higher. Preferably, you should have the current AM2000
installed before you begin a firmware download of the
option. However, if you do not, you can still download the
firmware upgrade using an earlier version of AM2000.
Preconfigured
Option
If you purchased a preconfigured DIU 2130/DBU, its EPROM already
contains the T1 Dial Backup Option. All you need do is to install the
plug-in module and ConnecT 56K DSU(s). Then configure the
element as directed in the section, “Overview of Installation and
Management Tasks”.
Download
Upgrade
If you purchased the downloadable software, you can download the
T1 Dial Backup Option into an existing DIU 2130 using AM2000. See
“Configuring the ConnecT 56K DSU for Dial Backup”.
NOTE: When you download a firmware upgrade to an existing
module, the upgrade is loaded into the battery-backup RAM
and not into the EPROM proper. If you disconnect the battery
in such a module, the firmware reverts to the original
firmware in the EPROM. Therefore, a module upgraded by a
firmware download is different from a preconfigured module
or one in which the EPROM has been replaced.
EPROM Upgrade If you purchased the EPROM upgrade, replace the existing EPROM in
the appropriate DIU 2130 with the upgrade EPROM.