Filter
Top Products
Appendix B ( SRS-2100 Installation
Page B-25
The maximum distance between
the NT1 and the ISDN Terminal
Equipment is 3000 feet in a single
unit installation. The TR switch
on the Terminal Equipment
should be ON. The TR switches
on the NT1 should be set at On at
100 Ohms. NT1 timing should be
set to ADAPTIVE (or PTP).
NT1 (TR = 100 Ohms)
Terminal Equipment (TR = ON)
Two Unit Installations
Bridging at the NT1 – Maximum
Distance Between NT1 and Units
is 250 ft.
The overall maximum length of the
cable is 1600 ft. The TR switch on
both Terminal Equipment Units
should be OFF. The TR switches
on the NT1 should be set to ON
at 50 Ohms. NT1 timing switches
(if present) should be set to
FIXED or (PB).
NT1 (TR = 50 Ohms)
Terminal Equipment (TR = OFF)
Terminal Equipment (TR = OFF)
Two Unit Installations
Bridging at the NT1 – Distance
Between NT1 and Units is Greater
Than 250 ft.
The overall maximum length of the
cable is 1600 ft. The TR switches
on both Terminal Equipment
Units should be ON. The TR
switched on the NT1 should be
set to OFF. NT1 timing switches
(if present) should be set to
FIXED or (PB) when the distance
between the NT1 and the
Terminal Equipment is 400 ft or
less for level 3 wire, or 600 ft for
level 5 wire. Longer loops require
ADAPTIVE (or PTP).
NT1 (TR = OFF)
Terminal Equipment (TR = ON)
Terminal Equipment (TR = ON)
Multiple Unit Installations –
Bridging at the NT1
The overall maximum length of the
cable is 1600 ft. The TR switch on
the Terminal Equipment farthest
from the NT1 should be ON. The
TR switches on all other Terminal
Equipment should be OFF. The
TR switches on the NT1 should
be set to ON at 100 Ohms. NT1
timing switches (if present)
should be set to ADAPTIVE (or
PTP).
NT1 (TR = ON 100 Ohms)
Terminal Equipment (TR = OFF)
Terminal Equipment (TR = OFF)
Terminal Equipment (TR = ON)