Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 60)

T1 Dial Backup Option Overview
5-12 Verilink
CAUTION
If you are testing a failed T1 circuit after the T1 Dial Backup Option has
switched the data to the backup circuit, you must first disable the
automatic feature as described in Configuring Modes for Dial Backup, on
page 58. Otherwise, the T1 Dial Backup Option can prematurely switch the
data back to the failed line if it senses a continuously reliable test pattern.
When the T1 circuit is reinstated, you can switch the T1 Dial Backup
Option back to automatic.
Configuring the ConnecT 56K DSU for Dial Backup
If you are using a Verilink ConnecT 56K DSU in your dial backup
system, you need to configure the ConnecT 56K DSU for use with
the T1 Dial Backup Option. For specific instructions and details, see
the ConnecT 56K DSU User Manual. Follow these basic steps.
1. Configure the unit for SW56 operation.
Use the 3 = Config menu as described in Chapter 3 of the
ConnecT 56K DSU User Manual. See also Table A-1 Telephone
company information in the aforementioned manual.
2. Configure the unit for DTR dialing.
This is also described in Chapter 3 of the ConnecT 56K DSU
User Manual. See especially the 4 = Dial Options section of that
manual. See also Table A-3 Configuration Profiles in the
aforementioned manual.
3. Program the unit with the number to dial if that dial backup
mode is initiated.
Use the 4 = Dial Options menu as described in Chapter 3 of the
ConnecT 56K DSU User Manual.