ADTRAN NT1 T400 Basic Rate Description, Passive Bus Description, Powering TEs from the NT1

Page 11

.

1.02Basic Rate Description

ISDN Basic Rate Service consists of two “B” channels at 64 kbps and a single “D” channel at 16 kbps. Basic Rate Service (2B+D Ser- vice) provides a total of 144 kbps to the customer for the transport of voice, circuit switched data, and packet switched data. Each “B” channel can be used for voice or data. The “D” channel carries the signaling information needed for call processing. The “D” channel can also carry packet switched data using the X.25 proto- col.

1.03Passive Bus Description

The “S/T’’ interface used to connect to the customer TE has the ability to connect multiple devices. This arrangement is referred to as the “passive bus” and can be used to connect up to eight TEs to the same Basic Rate line, as described in APPENDIX B.

1.04Powering TEs from the NT1

The ADTRAN NT1 Type 400 can be used to provide power for customer TEs. If the NT1 T400 circuit pack is used, a total of 12 watts is available. If the NT1 Type 400 Standalone unit is used, a total of seven watts is available. This power can be provided by Power Source 1 (PS1), which provides power over the transmit and receive wire pairs used by the “S/T” interface and requires no additional wire pairs; and by Power Source 2 (PS2), which pro- vides power over an additional wire pair.

1.05Rear Panel

The NT1 Type 400 Standalone rear panel contains three RJ45 con- nectors, as illustrated in Figure 1. A single connector, labeled “NETWORK,” is used to connect to the ISDN network. The re- maining two connectors, labeled “CUSTOMER 1” and “CUS- TOMER 2,” are used to interface to the customer’s TEs. These connectors are wired in parallel, and can be used to connect mul- tiple TEs in a passive bus arrangement.

 

 

 

 

 

 

 

 

CUSTOMER 1

 

 

115

 

 

 

 

 

 

 

 

 

 

 

 

 

VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

60 HZ

 

 

 

 

 

 

 

 

 

 

 

 

 

.07 A

 

 

NETWORK

 

 

CUSTOMER 2

 

 

 

 

 

 

 

 

 

 

 

Figure 1: NT1 Type 400 Standalone Rear Panel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

 

 

NT1 T400 User Manual

 

 

 

 

61212016L1-1

Image 11
Contents NT1 Type Canadian Standards Association Isdn Adtran Year 2000 Y2K Readiness Disclosure Customer Instructions Canadian Emissions Requirements Canadian Equipment Limitations Table of Contents Tables FiguresUnit Overview GeneralRear Panel Powering TEs from the NT1Basic Rate Description Passive Bus DescriptionSetting the Option Switches InstallationConnecting the Terminal Equipment Powering Up the NT1 Type 400 StandaloneTroubleshooting Repair and Return MaintenanceRemote Testing Loop Interface Specifications61212016L1-1 Appendix a NT1 Type 400 Circuit Pack Rack Installation Figure A-1 NT1 T400 Circuit Pack Connector Pin Assignments Short Passive BUS Appendix B BUS Configurations61212016L1-1 Technical Support and Warranty Information