ADTRAN T1-FT1 user manual Introduction, T1/FT1 Overview, T1 Service Offerings

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Chapter 1 Introduction

T1/FT1 OVERVIEW

T1 digital communication links have been used by the transmitting companies (Telcos) for the transmitting of voice since the early sixties. The D4 channel bank is an example of a T1 digital carrier system that was introduced in the mid seventies and is still widely used by the Telcos. Communication demands of businesses continued to grow to the point that the Telcos began offering T1 service directly to the public. D4 channel banks began to be used for T1 in corporate network topographies for voice. The technological advances in computer development created a demand also for T1 data communication which now is a large part of the T1 traffic.

T1 Service Offerings

T1 is a digital service that is delivered to the user over two pairs of wires from the service provider. The signal operates at 1.544Mbps and is usually extended by repeaters that are installed about every mile after the first 6000 feet. The T1 signal is divided into 24 time slots which operate at 64 kbps (DS0s). Each time slot is occupied by digitized voice or by data.

The T1 signal originally used a type of framing known as D4 Superframe which identifies how the T1 is multiplexed. An enhancement of that framing format is available now called Extended Superframe (ESF). ESF provides a non-disruptive means of full time monitoring on the digital facility. It was originally used by the service provider to monitor the

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TSU User Manual

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Contents Part Number 1200060L1 T1-FT1 Data/Channel Service UnitPage Iii REN/SOC FIC Usoc ServicePage Important Safety Instructions Warranty and Customer Service Viii Table of Contents Operation Index Index-1 Table of Contents Xii List of Figures Figure A-1 TSU Complete Menu DiagramList of Figures List of Tables List of Tables T1/FT1 Overview T1 Service OfferingsIntroduction Fractional T1 Functional Description TSU OverviewControl FunctionTest Jacks Interfaces FeaturesNx56/64 Serial Interface Network InterfaceControl Port Input Chain Por t OutputFront Panel Three Methods of ControlAdtran PC Program SnmpNetwork Timed TSU Clock SourcesDTE Clock Source DTE TimedInternal Clock Source Internal TimingLoopback Tests TSU TestingSelf Tests TSU Network LoopbacksAll Ones DTE Interface Loopbacks511 ApplicationUNPACK, INSPECT, Power Connection InstallationPower Connection Adtran Shipments IncludeNetwork WiringNetwork Pin Connection PIN Name DescriptionControl PIN Connection Name Description Control In/ChainControl In/Chain In Pin Connection Chain OUT PIN Connection Chain OutChain Out Pin Connection Primary V.35 Pin Connection Nx56k/64k DTENx 56k/64/ DTE PIN Connection PIN Ccitt DescriptionSelf Test Power UP Testing and InitializationMethods of Operation OperationFront Panel Operation CancelALM LCD WindowO N F I G General Menu OperationT a T U S Code Z S Setting the Data FieldE T W O R K N N I T To Exit Any Menu Field Operation or Display Viewing Display Only Data FieldsFour Opening Menus Menu StructureFour Opening Menu Functions Util Fact RestoreTIME/DATE Software VersionStatus Menu Menu OperationNI Perf RPTS, Submenu of 1Status 1RESET Perf CntrsData Values Minutes Hours15MIN / 24HR Curr ERR/ALM Submenu of 1Status Alarm InvestigatedState Active/Inactive ERR/ALM Hist Submenu of 1Status Clear HistoryComplete Configuration Menu ConfigurationO R M a T Code Z S Network NI Submenu of 2 ConfigXmit PRM Cntrl Port O N T R O L P O R T Alarm SUNIT, Submenu of 2 Config Data Rate AlarmsRate 56/64 PORT, Submenu of Config# of Chan Normal Mode of Operation1Time/Date, Submenu of 3Util UtilKeystroke Summary for Editing Time/Date M E 0 5 0 7 0 T E 0 8 / 0 5 / 93Reinit Unit, Submenu of 3Util 2Software Rev, Submenu of 3Util4Address,Submenu of 3Util 5Fact Restore, Submenu of 3UtilE I N I T D D R E S S 0 0 Complete Test Menu Test1Network Tests, Submenu of 4Test Loopback or 3PATTERN 2Run Selftest, Submenu of 4Test R 5 1 1 Error S 5 1 1 Error S = 53Port Tests submenu of 4Test S T E M S E L F T E S TT E L O O P B C K O F F Operation Far End Looped Back Test Testing ExampleN I T O R 3 U T I L Network Interface TestE T W O R K T E S T S U N S E L F T E S T Press Enter to activate a Remote Payload Loopback Testing Example Appendix a TSU Complete Menu Figure A-1. TSU Complete Menu DiagramAppendix A. TSU Complete Menu DTE Rate = 56K Appendix B DTE Data Rate ChartDTE Data Rate vs DS0s N # of DS0s N Appendix B. DTE Data Rate Chart Numerics IndexIndex Repair and Return Presales Inquiries and Applications SupportPost-Sale Support