Tran:3512 DSU/CSU User`s Manual:Chap1
Contents
1. operate together or separately supporting data rates from 1 2 to 56 kbps depending on line rate and operating mode Each multiplexed port can buffer input data to accommodate internal and external clock differences and can use the EJA 232 C D or V 35 electrical interface TDM is available as follows These services Support these configurations And these features DDS I type Point to point Multipoint Port to channel mapping mixed TDM channel sharing DDS II SC type Point to point Port to channel mapping 64k CC mixed TDM channel sharing NOTE TDM and channel sharing are compatible with other 35XX devices such as 3500 or 3520 DSU CSUs Refer to Chapter 6 3512 Operation for details Multipoint Multiplexing MP Mux The MP Mux feature supports a variety of capabilities MP Mux operates with DDS I type services at service rates of 9 6 19 2 and 56 kbps MP Mux provides e Multi channel operation of multiple applications on one multipoint circuit e A non disruptive network management channel over multipoint DDS I type circuits in Bitstealing and Muxed operating modes On a single 56 kbps channel in addition to the network management channels the 3512 offers Bitstealing mode at up to 55 2 kbps Muxed mode at up to 48 kbps for DTEs that require standard rate clocks Rate adaptation for multipoint applications to allow DTE rates that are lower than line rates and take advantage of attractive costs assoc2. Chapter 1 Introduction Contents MIU Hon li esac Sn al oad es cla pad wna evo awa PA olaaa Operate MOJEG src ca E ENE EaI ANNARA ENE REET DDS Type Services osas ice DDS I Secondary Channel SC Type Services ooconccommmmmmmon mees 64 kbps Clear Channel 64k CC Service isc ccccssccescesesccestasssesvorsecuvoaneas Synchronous Data Compression SDC scccssecsecssesccceesas sarees tocoscasceseuscstaus OTE PONE ida Remolie Front Panel REP a ad Time Division Multiplexer TDM and Channel Sharing 0 0 0 0 ee Multipoint Multiplexing MP MUX scion destin cca sua sttevuis iconos suaeceaesipsataes Restoral PSaLuTeS cuisine Integral Restoral sa A Integral Single Line Restoral SLR inicia Integral Digital Restoral DDS or Switched 56 c ooooonccnnccnccinccnnoncnanoos Exsmali 7Bl Restore Dial Lines Monbe DEM V a id Rate Adapa 94 aches tinsandiisnctelansnisariuaniene eriiisendem Nanaia Asynchronous to Synchronous Conversion ccocccccoccnoncnonconacanccanncnnncnnncnnanns Circuit Quality Monitoring System CQMS ou eeeceeseeeesteeeeteceeeeeeeees Tests Network Management System and WANVisible ooconconccinconocnnoninanannnos Ria a RR ea I OOO 00 00 00 ll 1 Dd 0000 UUO SH BW W U UY W Dual VIEW a AAA A A O baw esdues Compare qua aos coi Introduction 1 1 Chapter 1 Introduction 1 2 Introduction This chapter describes the features of the Motorola 3512 Data Se
3. DS II Secondary Channel SC Type Services With DDS II SC type services the local access circuit provides secondary channel bandwidth in addition to the selected rate for network management and control DDS I SC type services support point to point and multipoint operation at 2 4 4 8 9 6 and 19 2 kbps and point to point operation at 56 kbps 64 kbps Clear Channel 64k CC Service With 64k CC service 3512s can pass data on point to point circuits at a line or port rate of 64 kbps 64k CC supports network management in the non interruptive modes Bitstealing and Muxed Introduction 1 3 Synchronous Data Compression SDC 3512s with the synchronous data compression SDC feature offer the performance and reliability of the 3512 with transmission rates reaching 256 kbps 3512 SDC devices offer bandwidth expansion to increase throughput over low cost DDS type leased lines SDC devices e Allow point to point transmission of synchronous HDLC SDLC like data Provide faster file transfer and response times Use a modified version of the CCITT V 42 bis data compression algorithm with error detection and correction Provide automatic anti expansion to maintain high throughput of non compressible data Provide a migration path to higher bandwidth applications Support shared facilities for legacy and LAN to LAN applications obviating the need for parallel networks Offer compression on external A B analog or digital switched
4. circuits for restoral mode operation Offer compatibility with Motorola 326XFAST modems for an ideal restoral pool product set Offer integral Motorola leased line network management providing continuous network operations visibility and control of critical links The 3512 SDC lets you lower your digital service costs It provides optimum throughput for all HDLC SDLC like environments such as Systems Networking Architecture SNA Statistical Multiplexer and router networks There is a special reference card to use with the 3512 SDC 3512 SDC DSU CSU Reference Card Part No 09831 5 Rev A For SDC application examples refer to Chapter 7 3512 SDC Operation DTE Ports The 3512 is available with one two or four physical DTE ports The 3512 SDC is a three port unit Remote Front Panel RFP 3512s are equipped with Remote Front Panel RFP which enables you to view and set a remote device s parameters from the local device RFP includes escape RFP mode in which you can suspend an RFP session to check or adjust local parameters For details on RFP refer to Chapter 3 The Front Panel 1 4 Introduction Time Division Multiplexer TDM and Channel Sharing Time division multiplexing TDM and channel sharing sometimes known as port sharing features are available for the 3512 Channel sharing lets you map DTE ports to TDM channels one or more ports share the bandwidth of a TDM channel TDM and channel sharing
5. cordance with user defined parameters External A B Restoral The 3512 supports restoral to an external device such as a Motorola 326X FAST Series Modem or a 2 wire Switched Digital Data Service On a multi port 3512 Port 2 can route data to the restoral B device through its Line A Line B A B switch Implementing user defined failure parameters the 3512 can signal an external restoral device to establish a dial connection and switch operation to that line Operation can return to the primary line manually or automatically also in accordance with user defined parameters For more information on Refer to Configuring for restoral operation Chapter 4 Configuring the 3512 Typical restoral applications and examples Chapter 6 3512 Operation Configuring 326X V 32 bis or 326XFAST modems Chapter 6 3512 Operation as external Line B restoral devices Chapter 7 3512 SDC Operation The 3512 DSU CSU Quick Start Dial Line Monitor DLM The dial restoral line monitor DLM provides assurance that integral switched analog or digital restoral service will be available when you need it You can set the monitor to test the alternate line once per hour or once per day DLM generates an alarm and front panel message if the line is not ready for use Rate Adaptation Rate adaptation accommodates DTEs that use lower rates than the primary line rate It saves the expense of upgrading costly DTEs and lets you take adva
6. he 3512 features Motorola s powerful 68HC000 microprocessor and Motorola s custom VLSI chips The alphanumeric display and soft touch controls allow for front panel operation of all functions Password protection prevents inadvertent or unauthorized use of configuration test or remote functions Error messages pro vide immediate notification of operator input errors and communication line faults Any change to the 3512 s selected configuration is automatically stored and retained when power is turned off or lost Data protocols are transparent to the 3512 the 3512 SDC requires HDLC like data Four front panel keys let you to configure and monitor 3512s in your network You can run diagnostic tests on local and remote units A remote 3512 is easily accessed using the Remote Front Panel RFP feature or network management Operating synchronously or asynchronously the 3512 delivers versatile reliable cost effective data communications for your network Operating Modes CET ace The 3512 operates with DDS I and DDS II SC type services at rates up to 56 kbps and with Switched 56 kbps SW 56 and 64 kbps Clear Channel 64K CC services DDS Type Services DDS I and related services including fractional T1 with DDS or generic digital access support point to point and multipoint configurations at all operating rates The level of network management and control depends on the network configuration and 3512 operating mode selected D
7. iated with higher speed digital service You avoid upgrade charges later when you switch to higher speed DTE equipment Consolidation of multiple leased lines at a site onto one multipoint circuit providing substantial line cost savings For example five 9 6 kbps point to point circuits terminating at remote locations can be consolidated on a single 56 kbps multipoint circuit With an eight port 3520 at the host site and one port 3512s at up to eight remote sites virtual point to point channels are established to each remote site over the 56 kbps multipoint circuit e Automatic channel rate configuration of multiple slaves sent from the master device during the training sequence For more information on Refer to Configuring for MP Mux operation Chapter 4 Configuring the 3512 Typical MP Mux applications and examples Chapter 6 3512 Operation Introduction 1 5 Restoral Features The 3512 offers internal integral and external A B restoral to resume operation in the event of primary line failure With integral restoral you do not need an external device Restoral can be initiated and terminated e Manually from the front panel e Manually from a Motorola Network Management System NMS e Manually from an IBM NetView e Manually from a Novell WANVisible Network Manager e Automatically For more information on Refer to Configuring for restoral operation Chapter 4 Configuring the 3512 Typical restora
8. l applications and examples Chapter 6 3512 Operation Integral Restoral SW 56 1 6 Introduction Integral restoral can use an analog or digital line With integral restoral after returning transmission to the primary line the 3512 can hold the restoral connection and if necessary resume transmission on that line This feature eliminates the need to redial and reestablish the restoral connection Integral Single Line Restoral SLR The integral Single Line Restoral SLR feature automatically restores data transmission over the analog Public Switched Telephone Network PSTN SLR complies with CCITT recommendations for V 32 and V 32 bis modulation modes Implementing user defined line failure parameters the 3512 can dial up to four stored phone numbers in a specified order When a dial connection is established it switches operation to that line Operation can return to the primary line manually or automatically also in accordance with user defined parameters Integral Digital Restoral DDS or Switched 56 The integral digital restoral feature uses DDS or four wire Switched 56 SW 56 service to automatically restore data transmission at rates up to 56 kbps Implementing user defined failure parameters the 3512 can dial up to four stored phone numbers in a specified order When a SW 56 connection is established it switches operation to that line Operation can return to the primary line manually or automatically in ac
9. nd initiate 3512 tests For more information on Refer to The Dual VIEW feature Chapter 4 Configuring the 3512 Dual VIEW operation Chapter 9 Dual VIEW Mini Nest The 3512 and 3512 SDC are available in standalone or Mini Nest card module versions Multiple modules may be compactly mounted in the Motorola Mini Nest You can remove standalone 3512s from their enclosures and put them in a Mini Nest Consult your Motorola sales representative for conversion kit ordering information Chapter 2 Installing the 3512 explains how to remove a 3512 from its enclosure Standalone modules are compact half rack width allowing two 3512s to be placed side by side in a Motorola rack mount shelf Compatibility The 3512 is compatible with 3500 and 3520 DSU CSUs and in SLR mode with EN 326X devices depending on the circuit configuration For examples of circuit Em configurations that may benefit from mixing 3520s and 3512s refer to Chapter 6 3512 Operation If you have the SLR TDM MP Mux or Network Management features refer to Chapter 6 for interoperation considerations The 3512 SDC is compatible with other 3512 SDCs when in compress mode and with other 35XX s when not in compress mode In SLR mode the 3512 SDC is compatible with 326X devices depending on the circuit configuration Introduction 1 9 1 10 Introduction
10. ntage of less expensive high speed DDS lines Rate adaptation is supported over point to point or multipoint DDS I type circuits and point to point DDS II SC type circuits Asynchronous to Synchronous Conversion Integral asynchronous to synchronous conversion is standard and available on all channels The async to sync converter using the V 22 algorithm accepts asynchronous data converts the timing to match the synchronous DSU timing and delivers the data with asynchronous timing The converter operates with character lengths of 6 7 8 or 9 data parity bits Introduction 1 7 Circuit Quality Monitoring System CQMS The 3512 captures and displays comprehensive real time network information to aid in anticipating problems and isolating faults The Circuit Quality Monitoring System CQMS monitors major line parameters without disrupting data traffic Front panel lights and displays provide immediate performance information Knowledge of such properties as signal level and jitter help you identify line impairments while the error probability display provides a representation of line performance With a network manager CQMS reports alarms at the NMS if conditions deteriorate beyond established thresholds Tests The 3512 incorporates a variety of tests to evaluate the local and remote unit Power up Self Test Bit Error Rate Terminal Loopback Digital Loopback Remote Loopback DSU Check Local Loopback Pattern Tes
11. rvice Unit Channel Service Unit DSU CSU Designed for connection to a digital network the 3512 supports synchronous transmission up to 64 kbps and asynchronous transmission up to 19 2 kbps The 3512 is also available with a bandwidth expanding synchronous data compression SDC feature The 3512 SDC supports point to point transmission of synchronous HDLC SDLC like framed data over DDS leased lines at up to 256 kbps All 3512s function as digital modems boosting signals across a four wire leased line provided by an all digital transmission facility that conforms to AT amp T Publication 62310 and related Bellcore publications Supported services include AT amp T s DATAPHONE Digital Service DDS and DDS Secondary Channel ACCUNET Spectrum of Digital Services ASDS 64 kbps Clear Channel and digital services from local exchange and interexchange carriers such as MCI and U S Sprint Caution All 35XX devices such as 3500s 3512s and 3520s should be used in environments designed for computers and electronic equipment In areas susceptible to lightning take precautions to prevent damage to electronic equipment Contact your telephone service provider or an electronics accessories vendor for information on lightning protection equipment Customers experiencing problems due to surges from lightning have eliminated such problems by installing surge suppressors on power and data lines connected to 35XX devices Features T
12. ts e Service provider initiated RT DSU Loopback e Service provider initiated LL CSU Loopback e Service provider initiated 64k Clear Channel Latching Loopback LLB Network Management System and WANVisible 3512s with the Network Management feature support comprehensive communication with a Motorola Network Management System NMS such as the Motorola 9300 or 9800 From the NMS you can configure local and remote 3512s run reports monitor alarms and conduct trend analysis of any part of the network without the need for remote personnel or manual logs For more information on Refer to Network Management feature Chapter 4 Configuring the 3512 Typical NMS applications and examples Chapter 6 3512 Operation 3512s with Network Management also support a Novell WANVisible Network Manager 1 8 Introduction DualVIEW Management Dual VIEW Management enables control from IBM s NetView network management software from a Motorola NMS 9300 or 9800 or both concurrently Dualview can be purchased for 3512s and 3512 SDCs for use only when the SDC device is not in Compress mode DualVIEW does not operate with 64k CC service DualVIEW management maps manager commands to 3512 parameters using the Link Problem Determination Aid Revision 2 LPDA 2 protocol In dual management mode the NMS is dominant and some restrictions apply to NetView However the NetView operator can monitor 3512 parameters and line status a
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