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NT1/T400

ISDN NETWORK TERMINATION

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 network, 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 Ohm or the European unterminated configuration.

Features

	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 5ESSŽ, 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 Ohm or unterminated)
	Allows long and short passive bus arrangements
	Provides U-interface lightning protection
	Standard 5 year warranty

NT1/T400 APPLICATION EXAMPLE

Product Specifications

NT1 T400 INTERFACE

Network Compatibility

Interface: ISDN and other digital services

Network Interface

	Line: 2-wire (Tip and Ring)
	Operating Mode: Full-duplex
	Data Rate: 160 kbps total; 144 kbps available to customer
	Signal Format: 2B1Q
	Output Amplitude: 2.5 volt, zero-to-peak
	Tx and Rx Source Impedance: Per ANSI T1.601-1992
	Receiver Sensitivity: Per ANSI T1.601-1992

Customer Interface

	Line: 4-wire (Tx and Rx pair)
	Operating Mode: Full-duplex
	Data Rate: 192 kbps total; 144 kbps available to customer
	Signal Format: 2B1Q
	Output Amplitude: 2.5 volt, zero-to-peak
	Tx and Rx Source Impedance: Per ANSI T1.605-1991
	Receiver Sensitivity: Per ANSI T1.605-1991

FACEPLATE INDICATORS

	Power: Power is ON
	Ready: Unit is ready for customer data
	Error: Terminal (S/T-interface) error detected

AGENCY APPROVAL

FCC Approval: FCC part 15, Class B

ENVIRONMENTAL

	Operating: 0° to 50° C (32° to 122° F)
	Storage: -20° to 70° C (-4° to 158° F)
	Relative Humidity: Up to 95%, non-condensing

PHYSICAL

	Size: 5.625" H, 6" D, 1.375" W
	Weight: 10 oz
	Circuit Pack Mounting: Mounts in Type 400 equipment shelves such as ADTRAN Type 400 Shelf, part number 1150028L1 or 1150024L1

POWER

	-48 VDC
	1.1 W dissipation
	Circuit pack: Sources S/T power to 12 watts
	Standalone: Sources S/T power to 7 watts

5ESS is a registered trademark of LUCENT
DMS-100 is a trademark of Northern Telecom

SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE.

Ordering Information

	NT1 Circuit Pack - 1212010
	NT1 Standalone, 110 V - 1212016L1

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Last modified: June 05, 2008