AT&T Data Service Units 3551 Manuel d'utilisateur

COMSPHERE3550 SeriesData Service UnitsModels 3550 and 3551User’s GuideDocument No. 3550-A2-GB20-10

Table of Contentsiii3550-A2-GB20-10 February 1995List of FiguresFigure Page2-1 Model 3550 Hardware Switch Location (shown without a TDM/Flex) 2-3. . .

A-13550-A2-GB20-10 February 1995DSU MenuOverview A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service UnitsA-2 February 1995 3550-A2-GB20-10

DSU MenuA-33550-A2-GB20-10 February 1995

COMSPHERE 3550 Series Data Service UnitsA-4 February 1995 3550-A2-GB20-10Continued from Page A-1.Press a function key to select one of the followingbr

B-13550-A2-GB20-10 February 1995Configuration WorksheetsOverview B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Model 3550 or 3551 DSU Configuration Worksheet (1 of 2)(Full Menu Mode: Enabled)Date:_______________________________________________ Location:_

Model 3550 or 3551 DSU Configuration Worksheet (2 of 2)(Full Menu Mode: Enabled)Backup ValueAuto Bckup Enab, DisabBackup Dir (Chang) (1–10)Fa

Model 3550 or 3551 DSU Configuration Worksheet (1 of 2)(Full Menu Mode: Disabled)Date:_______________________________________________ Location:

Model 3550 or 3551 DSU Configuration Worksheet (2 of 2)(Full Menu Mode: Disabled)MUX (Setup) ValueMUX Funct Enab, DisabShare DevA Enab, DisabPo

COMSPHERE 3550 Series Data Service UnitsB-6 January 1995 3550-A2-GB20-10This page intentionally left blank.

COMSPHERE 3550 Series Data Service Unitsiv February 1995 3550-A2-GB20-10List of TablesTable Page1-1 General Technical Specifications 1-4. . . . . . .

C-13550-A2-GB20-10 February 1995Status Indicators andControl Panel MessagesOverview C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service UnitsC-2 February 1995 3550-A2-GB20-10Table C-1DSU Status IndicatorsLabelColor DescriptionOK Green Health and statu

Status Indicators and Control Panel MessagesC-33550-A2-GB20-10 February 1995Control Panel MessagesThis section shows the screen format of messagesappe

COMSPHERE 3550 Series Data Service UnitsC-4 February 1995 3550-A2-GB20-10Table C-3(2 of 3)Device Health and Status MessagesMessage ConditionDial Tone:

Status Indicators and Control Panel MessagesC-53550-A2-GB20-10 February 1995Table C-3(3 of 3)Device Health and Status MessagesMessage ConditionMUX Dev

COMSPHERE 3550 Series Data Service UnitsC-6 February 1995 3550-A2-GB20-10Table C-4Expanded Health and Status MessagesMessageConditionDial Attempt:nnTh

Status Indicators and Control Panel MessagesC-73550-A2-GB20-10 February 1995Table C-5Subnetwork Health and Status MessagesMessageConditionDevic TDM/Fl

COMSPHERE 3550 Series Data Service UnitsC-8 February 1995 3550-A2-GB20-10Progress MessagesTable C-6 describes the command progress messages,and Table

Status Indicators and Control Panel MessagesC-93550-A2-GB20-10 February 1995Error MessagesTable C-8 describes the command error messages,Table C-9 des

COMSPHERE 3550 Series Data Service UnitsC-10 February 1995 3550-A2-GB20-10Table C-9Dial Backup Error MessagesMessageNotify NMS1Condition ActionDBM: Bu

Table of Contentsv3550-A2-GB20-10 February 1995Table PageC-1 DSU Status Indicators C-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Status Indicators and Control Panel MessagesC-113550-A2-GB20-10 February 1995Table C-10(1 of 3)TDM/Flex Error MessagesMessageCondition ActionAll Async

COMSPHERE 3550 Series Data Service UnitsC-12 February 1995 3550-A2-GB20-10Table C-10(2 of 3)TDM/Flex Error MessagesMessage ActionConditionInvalid timi

Status Indicators and Control Panel MessagesC-133550-A2-GB20-10 February 1995Table C-10(3 of 3)TDM/Flex Error MessagesMessage ActionConditionSync >

COMSPHERE 3550 Series Data Service UnitsC-14 February 1995 3550-A2-GB20-10This page intentionally left blank.

D-13550-A2-GB20-10 February 1995Pin AssignmentsOverview D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service UnitsD-2 February 1995 3550-A2-GB20-10Table D-1Model 3550 – Digital (DDS) Network 8-Pin Cable Connector Pin Assign

Pin AssignmentsD-33550-A2-GB20-10 February 1995Table D-33600 Hubbing Device Pin AssignmentsPin # Signal Name Input/Output1 +5 Vdc Input2 DCOSD/CCIRD I

COMSPHERE 3550 Series Data Service UnitsD-4 February 1995 3550-A2-GB20-10Figure D-3. Model 3551 DSU 25-Pin EIA-232/25-Pin V.35 Rear Connector Plate (3

Pin AssignmentsD-53550-A2-GB20-10 February 1995Table D-5EIA-232/V.24 Connector Pin AssignmentsPinCircuit NameFunctionPinEIA-232CCITTFunction2 BA 103 T

COMSPHERE 3550 Series Data Service UnitsD-6 February 1995 3550-A2-GB20-10Figure D-4. V.35 Interconnect Cable (3000-F1-510)

COMSPHERE 3550 Series Data Service Unitsvi February 1995 3550-A2-GB20-10This page intentionally left blank.

Pin AssignmentsD-73550-A2-GB20-10 February 1995Table D-6V.35 Connector Pin Assignments25-Pin Connector(Rear ConnectorPlate)34-Pin Connector (V.35 Inte

COMSPHERE 3550 Series Data Service UnitsD-8 February 1995 3550-A2-GB20-10Figure D-5. EIA-232-D Crossover Cable (4951-035F)

Pin AssignmentsD-93550-A2-GB20-10 February 1995Figure D-6. V.35 Crossover Cable (3211-178F)

COMSPHERE 3550 Series Data Service UnitsD-10 February 1995 3550-A2-GB20-10This page intentionally left blank.

E-13550-A2-GB20-10 February 1995Application ConfigurationsOverview E-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service UnitsE-2 February 1995 3550-A2-GB20-10Figure E-1. Point-to-Point Application Configurations with Internal and Exter

Application ConfigurationsE-33550-A2-GB20-10 February 1995Multipoint ApplicationsModel 3550 and Model 3551 DSUs also providehigh-speed multipoint circ

COMSPHERE 3550 Series Data Service UnitsE-4 February 1995 3550-A2-GB20-10This page intentionally left blank.

F-13550-A2-GB20-10 February 1995Equipment ListEquipmentFeature/Part No.G = Factory Install.F = Field Install.ComcodeModel 3550 Standalone DSUWith V.32

COMSPHERE 3550 Series Data Service UnitsF-2 February 1995 3550-A2-GB20-10Equipment ComcodeFeature/Part No.G = Factory Install.F = Field Install.Model

vii3550-A2-GB20-10 February 1995PrefaceAbout This GuideThis user’s guide provides the information needed toinstall and operate your Model 3550 or 355

Equipment ListF-33550-A2-GB20-10 February 1995Equipment* Part NumberAT&T Paradyne Field Service SparesFor Model 3550 DSU 2-Port TDM/FlexFor Mo

COMSPHERE 3550 Series Data Service UnitsF-4 February 1995 3550-A2-GB20-10Equipment* Part NumberModel 3550 Digital (DDS) Network Interface Cable – RJ48

Glossary-13550-A2-GB20-10 February 1995Glossaryactive core The core that is transmitting data. For example, the DBM is the active core whenthe unit is

COMSPHERE 3550 Series Data Service UnitsGlossary-2 February 1995 3550-A2-GB20-10CCITT The International Consultative Committee for Telegraphy and Tele

GlossaryGlossary-33550-A2-GB20-10 February 1995Device Test(Devic)A test that uses an internal test pattern generator built into the DSU to verify that

COMSPHERE 3550 Series Data Service UnitsGlossary-4 February 1995 3550-A2-GB20-10errored second A performance measurement reported during Digital Test

GlossaryGlossary-53550-A2-GB20-10 February 1995multipoint circuit A data network circuit that uses multipoint transmission and consists of one control

COMSPHERE 3550 Series Data Service UnitsGlossary-6 February 1995 3550-A2-GB20-10session disruptive Application data may be disrupted when running a te

Index-13550-A2-GB20-10 February 1995IndexAAbortselective, 4-9subnetwork, 4-9Abort Call failure message, C-6AC power, requirements, 1-4Active message,

COMSPHERE 3550 Series Data Service UnitsIndex-2 February 1995 3550-A2-GB20-10CcablecrossoverEIA-232-D, figure, D-8V.35, figure, D-9EIA-232, connecting

COMSPHERE 3550 Series Data Service Units viii February 1995 3550-A2-GB20-10Related DocumentsOther product documentation includes the following:3000-A2

IndexIndex-33550-A2-GB20-10 February 1995Ddata ratesDSU, 1-6V.32 DBM, 1-7DBMAggreg Exceeded error message, C-11Answering message, C-8Busy error messag

COMSPHERE 3550 Series Data Service UnitsIndex-4 February 1995 3550-A2-GB20-10Dir Empty, DBM error message, C-10directorydial backup, 4-17entry, and pa

IndexIndex-53550-A2-GB20-10 February 1995FFac Alarm, C-4FacAlOnCMI, 5-21faceplate, Model 3611, 4-3Facil message, C-7Facility Alarm, C-2Fail message, C

COMSPHERE 3550 Series Data Service UnitsIndex-6 February 1995 3550-A2-GB20-10LLADS, 1-1connection, distances, table, 2-8network, connection, 2-7, 3-9o

IndexIndex-73550-A2-GB20-10 February 1995NNetL, DSU test, C-4networkaddress, 4-18addressing, link-level, 3-10compatibility, DSU, 1-6connection, 3-8DDS

COMSPHERE 3550 Series Data Service UnitsIndex-8 February 1995 3550-A2-GB20-10portasynchronous rates, TDM, 1-8capacity, 1-3DTE interface, TDM, 1-8rates

IndexIndex-93550-A2-GB20-10 February 1995shock, 1-4signal level, 1-7Single Rate, 5-13single-port async/sync, 1-1specifications, technical, 1-3DSU, 1-6

COMSPHERE 3550 Series Data Service UnitsIndex-10 February 1995 3550-A2-GB20-10UUL, 1-4Undersp Required error message, C-13Underspeed, 5-27, 5-28, 5-29

1-13550-A2-GB20-10 February 1995About Your DSUOverview 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service Units1-2 February 1995 3550-A2-GB20-10• Diagnostic Control Panel control. TheModel 3550 DSU is controlled from its

About Your DSU1-33550-A2-GB20-10 February 19952-Port TDM/FlexThe 2-port TDM/Flex is a separate circuit card thatattaches to the Model 3550 DSU. It all

COMSPHERE 3550 Series Data Service Units1-4 February 1995 3550-A2-GB20-10Table 1-1(1 of 2)General Technical SpecificationsSpecificationsCriteriaAPPROV

February 1995COMSPHERE3550 SeriesData Service UnitsModels 3550 and 3551User’s GuideDocument No. 3550-A2-GB20-10ParadynePrinted on recycled paper

About Your DSU1-53550-A2-GB20-10 February 1995Table 1-1(2 of 2)General Technical SpecificationsSpecifications CriteriaHEAT DISSIPATION (MAX.) AT 115 V

COMSPHERE 3550 Series Data Service Units1-6 February 1995 3550-A2-GB20-10Table 1-2DSU Technical SpecificationsSpecifications CriteriaAPPLICATION Full-

About Your DSU1-73550-A2-GB20-10 February 1995Table 1-3V.32 DBM Technical SpecificationsSpecifications CriteriaRINGER EQUIVALENCE NUMBER (REN) DBM opt

COMSPHERE 3550 Series Data Service Units1-8 February 1995 3550-A2-GB20-10Table 1-42-Port TDM/Flex Technical SpecificationsSpecifications CriteriaAPPLI

About Your DSU1-93550-A2-GB20-10 February 1995Out of WarrantyIf your equipment is out of warranty and you do nothave a maintenance support agreement,

COMSPHERE 3550 Series Data Service Units1-10 February 1995 3550-A2-GB20-10This page intentionally left blank.

2-13550-A2-GB20-10 February 1995Installing the Model 3550 DSUOverview 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service Units2-2 February 1995 3550-A2-GB20-10circuit must be capable of supplying a minimum of2 amperes at 115 Vac. Refer

Installing the Model 3550 DSU2-33550-A2-GB20-10 February 1995Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex)Table 2-1Model

COMSPHERE 3550 Series Data Service Units2-4 February 1995 3550-A2-GB20-10Where to Place the DSUAs mentioned earlier, the DSU must be placed within6 fe

COMSPHERE 3550 Series Data Service UnitsA February 1995 3550-A2-GB20-10COMSPHEREModel 3550 and 3551Data Service UnitsUser’s Guide3550-A2-GB20-102nd Ed

Installing the Model 3550 DSU2-53550-A2-GB20-10 February 1995Power-Up RoutineWhen power is applied, the DSU:• Determines what options (DBM or TDM/Flex

COMSPHERE 3550 Series Data Service Units2-6 February 1995 3550-A2-GB20-10Connecting to the NMSA 3600 Hubbing Device is required to connect thecontrol

Installing the Model 3550 DSU2-73550-A2-GB20-10 February 1995Connecting to the DDS (or LADS) NetworkNOTEBefore connecting the DSU to theDDS network, e

COMSPHERE 3550 Series Data Service Units2-8 February 1995 3550-A2-GB20-10Table 2-2LADS Connection DistancesData RateWire Gauge (AWG)Data Rate(kbps)19

Installing the Model 3550 DSU2-93550-A2-GB20-10 February 1995Tributary DSU AddressingTributary DSU addresses are user-definable, but takecare that the

COMSPHERE 3550 Series Data Service Units2-10 February 1995 3550-A2-GB20-10Connecting the DSU to a DTEThe DSU’s rear panel has both a 25-pin EIA-232-D/

Installing the Model 3550 DSU2-113550-A2-GB20-10 February 1995Connecting Port 2For the EIA-232 cable, install as described above.For the V.35 cable, i

COMSPHERE 3550 Series Data Service Units2-12 February 1995 3550-A2-GB20-10Verifying DBM OperationIf a DBM is installed, test the tributary DBM fordial

3-13550-A2-GB20-10 February 1995Installing the Model 3551 DSUOverview 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service Units3-2 February 1995 3550-A2-GB20-10Before You BeginThe COMSPHERE 3000 Series Carrier should alreadybe installed

Safety InstructionsB3550-A2-GB20-10 February 1995Important Safety Instructions1. Read and follow all warning notices and instructions marked on the pr

Installing the Model 3551 DSU3-33550-A2-GB20-10 February 1995Figure 3-1. Model 3551 DSU Switch and Jumper LocationsTable 3-1Model 3551 DSU Switch Sett

COMSPHERE 3550 Series Data Service Units3-4 February 1995 3550-A2-GB20-10Table 3-2Model 3551 DSU Jumper StrapsStrapDesignationState ofJumper StrapFunc

Installing the Model 3551 DSU3-53550-A2-GB20-10 February 1995Installing the DSUThe initial installation procedure for the Model 3551DSU requires the i

COMSPHERE 3550 Series Data Service Units3-6 February 1995 3550-A2-GB20-104. Using a Phillips screwdriver, loosen the screwholding the circuit pack loc

Installing the Model 3551 DSU3-73550-A2-GB20-10 February 19957. At the rear of the carrier, connect the appropriateDTE interface cable (EIA-232-D or V

COMSPHERE 3550 Series Data Service Units3-8 February 1995 3550-A2-GB20-10Power-Up RoutineWhen power is applied, the DSU:• Determines what options (DBM

Installing the Model 3551 DSU3-93550-A2-GB20-10 February 1995Connecting to the DDS (or LADS) NetworkNOTEBefore connecting the DSU to theDDS network, e

COMSPHERE 3550 Series Data Service Units3-10 February 1995 3550-A2-GB20-10Tributary DSU AddressingTributary DSU addresses are user-definable, but take

Installing the Model 3551 DSU3-113550-A2-GB20-10 February 1995To Connect the SDCP to a DSUFor the carrier-mounted Model 3551 DSU, the SDCPmust first b

COMSPHERE 3550 Series Data Service Units3-12 February 1995 3550-A2-GB20-10Other TestsThe following lists the tests available on your DSU.Refer to the

COMSPHERE 3550 Series Data Service UnitsC February 1995 3550-A2-GB20-10Notices

4-13550-A2-GB20-10 February 1995Operating the DSUOverview 4-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service Units4-2 February 1995 3550-A2-GB20-10Control Branch 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Operating the DSU4-33550-A2-GB20-10 February 1995Figure 4-2. SDCP and Model 3551 DSU FaceplateBoth control panels have a 2-line, 16-character liquidcr

COMSPHERE 3550 Series Data Service Units4-4 February 1995 3550-A2-GB20-10F1 F2F3• The key returns you to the top-level menu, andterminates any wor

Operating the DSU4-53550-A2-GB20-10 February 1995Expanded Health and StatusExpanded Health and Status (Expan) only appearsduring automatic dialing. It

COMSPHERE 3550 Series Data Service Units4-6 February 1995 3550-A2-GB20-10Table 4-1Identity DescriptionsDescriptionInformation DisplayedModel: 3550 or

Operating the DSU4-73550-A2-GB20-10 February 1995If the tributary DSU is to initiate the call, set thecontrol for Cllbk and the tributary for Pswrd.Ex

COMSPHERE 3550 Series Data Service Units4-8 February 1995 3550-A2-GB20-10Table 4-2Backup Branch Menu SelectionsCurrentBackup ModeBackupCommandEffectId

Operating the DSU4-93550-A2-GB20-10 February 1995Test BranchThe Test branch provides extensive testing capabilitiesfor the DSU, the DDS circuit, the D

COMSPHERE 3550 Series Data Service Units4-10 February 1995 3550-A2-GB20-10NOTETo issue a Local Loopback to atributary DSU, the DSU must have aDBM inst

Safety InstructionsD3550-A2-GB20-10 February 1995Government RequirementsThe Federal Communications Commission (FCC) requires that instructions pertain

Operating the DSU4-113550-A2-GB20-10 February 1995Table 4-3Digital Test ResultsResultsInformation DisplayedTime: Running test timer. (The Clrselection

COMSPHERE 3550 Series Data Service Units4-12 February 1995 3550-A2-GB20-10Table 4-5Bit Error Rate Test ResultsResults Information DisplayedTime: Runni

Operating the DSU4-133550-A2-GB20-10 February 19956. Select the mode:• Enable Full Mode (F2) – All configurationoptions will be displayed.• Disable Fu

COMSPHERE 3550 Series Data Service Units4-14 February 1995 3550-A2-GB20-105. Select Save (F1).The Save to screen appears.6. Select Activ (F1).The sele

Operating the DSU4-153550-A2-GB20-10 February 199516. Select SAVE (F1).17. Save to Activ (F1).Command Complete appears to confirm that theconfiguratio

COMSPHERE 3550 Series Data Service Units4-16 February 1995 3550-A2-GB20-10To delete a network address (e.g., 3) from the poll list:ProcedureF1Chng Po

Operating the DSU4-173550-A2-GB20-10 February 1995DirectoryThe DSU’s dial backup Directory (Dir) can store up toten telephone numbers (dial strings) s

COMSPHERE 3550 Series Data Service Units4-18 February 1995 3550-A2-GB20-1010. Press the key to return to the Enter Dirscreen.11. Press the F3 key

Operating the DSU4-193550-A2-GB20-10 February 19956. Select Save (F2).The DSU displays the address assigned along witha Command Complete message.If an

COMSPHERE 3550 Series Data Service Units4-20 February 1995 3550-A2-GB20-10Table 4-7Lead StatesSymbolMeaningOff (below text line)ON (above text line)Ch

COMSPHERE 3550 Series Data Service UnitsE February 1995 3550-A2-GB20-10The DDS Service Order Number is 6.0Y. The jack configurations required are RJ48

5-13550-A2-GB20-10 February 1995Configuring the UnitOverview 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

COMSPHERE 3550 Series Data Service Units5-2 February 1995 3550-A2-GB20-10Once loaded, the following Edit/Save submenuappears:F1Edit/Save:SAVE DSU DBMF

Configuring the Unit5-33550-A2-GB20-10 February 1995Saving Configuration OptionsCAUTIONBe extremely careful when savingconfiguration options to avoids

COMSPHERE 3550 Series Data Service Units5-4 February 1995 3550-A2-GB20-10F1Edit/Save:SAVE DSU DiagF2F3F1Chang Diag Opts:DSU DBM GenF2F3F1Diag Type:

Configuring the Unit5-53550-A2-GB20-10 February 1995F1Port 1 DSU 9.6 TLocal RemotF2F3This example is now complete.Configuration Option TablesThis se

COMSPHERE 3550 Series Data Service Units5-6 February 1995 3550-A2-GB20-10Table 5-1(1 of 2)DSU Configuration OptionsRate(Kbps): 9.6Next 64L

Configuring the Unit5-73550-A2-GB20-10 February 1995Table 5-1(2 of 2)DSU Configuration OptionsRxElasStor: DisabNext Enab Disab Pr

COMSPHERE 3550 Series Data Service Units5-8 February 1995 3550-A2-GB20-10Table 5-2Diagnostic (DSU) Configuration OptionsDiag Type: DisrNext Non

Configuring the Unit5-93550-A2-GB20-10 February 1995Table 5-3Diagnostic (DBM) Configuration OptionsDiag Type: DisrNext NonD Disr

COMSPHERE 3550 Series Data Service Units5-10 February 1995 3550-A2-GB20-10Table 5-4Diagnostic (External DBU) Configuration OptionsDiag Type: DisrNext

i3550-A2-GB20-10 February 1995Table of ContentsPrefaceAbout This Guide vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuring the Unit5-113550-A2-GB20-10 February 1995Table 5-5(2 of 2)Diagnostic (General) Configuration OptionsTribTimOut: 0:10Next Chang

COMSPHERE 3550 Series Data Service Units5-12 February 1995 3550-A2-GB20-10Table 5-6(1 of 4)DBM Configuration OptionsRate(Kbps): 9.6Next 14.4

Configuring the Unit5-133550-A2-GB20-10 February 1995Table 5-6(2 of 4)DBM Configuration OptionsSingle Rate: YesNext Yes No PrevSi

COMSPHERE 3550 Series Data Service Units5-14 February 1995 3550-A2-GB20-10Table 5-6(3 of 4)DBM Configuration OptionsCall Setup:NoneNext None

Configuring the Unit5-153550-A2-GB20-10 February 1995Table 5-6(4 of 4)DBM Configuration OptionsV.13 Signl: Enab for MPTC and MPTT; Disab for other con

COMSPHERE 3550 Series Data Service Units5-16 February 1995 3550-A2-GB20-10Table 5-7External DBU Configuration OptionsExtBU: NoneNext Ansr

Configuring the Unit5-173550-A2-GB20-10 February 1995Table 5-8(1 of 4)General Configuration OptionsDTE Port: EIA232Next EIA232 V.35

COMSPHERE 3550 Series Data Service Units5-18 February 1995 3550-A2-GB20-10Table 5-8(2 of 4)General Configuration OptionsLSD Lead: StdNext Std

Configuring the Unit5-193550-A2-GB20-10 February 1995Table 5-8(3 of 4)General Configuration OptionsLL by DTE: DisabNext Enab Disab

COMSPHERE 3550 Series Data Service Units5-20 February 1995 3550-A2-GB20-10Table 5-8(4 of 4)General Configuration OptionsDTR Alarm: DisabNext En

COMSPHERE 3550 Series Data Service Unitsii February 1995 3550-A2-GB20-104. Operating the DSUOverview 4-2. . . . . . . . . . . . . . . . . . . . . . .

Configuring the Unit5-213550-A2-GB20-10 February 1995Table 5-9(1 of 2)Backup Configuration OptionsAuto Bckup:DisabNext Enab Disab

COMSPHERE 3550 Series Data Service Units5-22 February 1995 3550-A2-GB20-10Table 5-9(2 of 2)Backup Configuration OptionsRestorTimOut: 5mNext Cha

Configuring the Unit5-233550-A2-GB20-10 February 1995Table 5-10MUX (Setup) Configuration OptionsMUX Funct: Disab for MPTC; Enab for all other configur

COMSPHERE 3550 Series Data Service Units5-24 February 1995 3550-A2-GB20-10Table 5-11(2 of 4)MUX (Port) Configuration Options*Async Rate: =SyncNext

Configuring the Unit5-253550-A2-GB20-10 February 1995Table 5-11(3 of 4)MUX (Port) Configuration Options*TxCarrSel: ConstNext Const Cntrl

COMSPHERE 3550 Series Data Service Units5-26 February 1995 3550-A2-GB20-10Table 5-11(4 of 4)MUX (Port) Configuration Options*Elast Stor: DisabNext

Configuring the Unit5-273550-A2-GB20-10 February 1995Table 5-12Port Speed (DSU) Configuration OptionsPrt1( 9.6): 9.6Next 64 56 48

COMSPHERE 3550 Series Data Service Units5-28 February 1995 3550-A2-GB20-10Table 5-13Port Speed (DBM) Configuration OptionsPrt1( 9.6): 9.6Next 1

Configuring the Unit5-293550-A2-GB20-10 February 1995Table 5-14Port Speed (External DBU) Configuration OptionsPrt1( 9.6): 9.6Next 64 56

COMSPHERE 3550 Series Data Service Units5-30 February 1995 3550-A2-GB20-10This page intentionally left blank.