ADTRAN 1212010, User Manual

Page: 20 / 33

Chapter 2. Installation
2-2 NT1 T400 User Manual 61212016L1-20
Table 2-1. NT1 Type 400 Switch Settings
Refer to Appendix B, S/T Bus Configurations on page B-1 to determine
what type of bus and termination apply to your installation to set the
switches accordingly.
POWERING UP THE NT1 TYPE 400 STANDALONE
To power-up the NT1 Type 400 Standalone for the first time, perform
the following procedures in order:
1. Plug the power cord into a grounded, 120 VAC, 60 Hz receptacle.
2. Verify that the ERROR indicators are illuminated. After about 15
seconds, the READY indicators should flash at a 1 Hz rate.
3. Should any of these indicators fail to operate as stated, see Chap-
ter 3, Troubleshooting on page 3-1.
Table 2-2 on page 2-3 gives pin assignments for the unit.
Switch Description On Off
6 50
Ω
termination 50
Ω
None
5 50
Ω
termination 50
Ω
None
4 100
Ω
termination 100
Ω
None
3 100
Ω
termination 100
Ω
None
2 Long or short passive bus Long Short
1 Future use N/A N/A