Appendix A. Connector Pin Definitions
NetVanta 1000 Series Switch Hardware Installation Guide
46
© 2004 ADTRAN, Inc.
61200500L1-34C
Dial Backup Interface Module Connectors
Table A-11. DBU Connector Pinouts
Pin
Name
Description
1-3
—
Unused
4
T
Network–Tip
5
R Network–Ring
6-8
—
Unused
Table A-12. E1 DBU Connector Pinouts
Pin
Name
Description
1,2
—
Unused
3
R1
Network–Ring1
4
R
Network–Ring
5
T
Network–Tip
6
T1
Network–Tip1
7,8
—
Unused
An optional DIM is required for dial backup applications.