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Appendix C: Switches
The significance of each switch on the rear panel of the ISDN NT1
is given in Table 6.
Value
No termination
Termination of 50
Termination of 100
Devices located less than 75 m
from the ISDN NT1
Devices located more than 75 m
from the ISDN NT1
Technical Specifications
Safety
• Use with a certified Class 2 power supply.
Typical Power Requirements
• 80 mA at +9 Volts
Environmental Requirements
• Operating temperature: 0°C to 50°C
• Operating humidity: 0 to 90% (non-condensing)
• Barometric operating pressure: 86 to 106 kPascals
Ω
Ω
Table 6. Significance of the Switches
10 Eicon Network Termination (NT1) Installation Guide
Switch Positions
1
2
3
off
off
off
on
on
on
off
on
off
4
5
off
on
on
on
off
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