Adtran Network Cable, 1xCentronics, 1xCentronics, 5ft 3353004 Leaflet

■

Compatible with 2B1Q basic
rate services and standard
ISDN terminals

■

Provides 2B+D basic rate services

■

Conforms to ANSI T1.601-1992
and ANSI T1.605-1991

■

Supports multiple switch vendors
including LUCENT 5ESS

®

,

NTI DMS-100

™

■

Mounts in a Type 400 multi-mount
shelf or as a standalone unit

■

Supports S/T Bus powering
sources including phantom
power and dedicated pair

■

Provides automatic overcurrent
protection for S/T power

■

Supports US or European
standard configurations
(100 

Ω

or unterminated)

■

Allows long and short passive
bus arrangements

■

Provides U-interface lightning
protection

■

Standard 5 year warranty

U-Interface

Local Loop

TA

NT1

ISDN Phone

ISDN Switch

S/T BUS

Telephone Company Office

Customer  Premises

NT1/T400

The ADTRAN Type 400 NT1 provides network termination for the 2B1Q

basic rate interface between the customer terminal equipment and the ISDN
network. Basic Rate ISDN consists of two 64 kbps B channels and a single
16 kbps D channel. The U-interface is used for connection to the ISDN net-
work, while the S/T-interface is used for the subscriber terminal equipment.
The U- and S/T-interfaces conform to ANSI and CCITT standards and perform
all Layer 1 functions. The NT1 contains lightning protection circuitry to protect
from lightning and line transients on the network interface. Three LED status
indicators on the front panel aid in fault isolation.

The NT1 operates as a standalone unit or in a multiple Type 400 mounting

such as the ADTRAN Type 400 Shelf, part number 1150028L1 or 1150024L1.
The NT1 monitors the S/T-interface for an overcurrent fault condition. In
the event of such a condition, the NT1 automatically limits the amount of
current being delivered until the fault condition is removed.

The S/T-interface may have as many as eight passive bus devices connected

to it as either multiple terminals within 50 meters of each other over the full
1,500 meter range of the interface, or multiple terminals of arbitrary spacing
within 200 meters. Termination impedance options include the US standard of
100 

Ω

or the European unterminated configuration.