Black Box May-95, ME758C-RJ45, ME759C-RJ45 Recommended Impedance Settings, S3-4 Mode Selection

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MULTI-FUNCTION LD CARD

Table 3-4. Recommended Impedance Settings

Cable					Data Rates in kbps
Gauge	1.2	1.8	2.4	3.6		4.8	7.2	9.6	14.4	19.2	28.8	38.4	57.6

19	320	320	200	200		200	200	200	130	130	130	130	130

22	320	320	320	200		200	200	200	200	130	130	130	130

24	320	320	320	320		200	200	200	200	200	130	130	130

26	320	320	320	320		320	200	200	200	200	200	130	130

S3-4: Mode Selection

Set position 4 of switch S3 to determine whether the Multi-Function LD Card operates in point-to-point or multipoint mode.

S3-4	Operation
On	Point-to-point (also multipoint as the “master”) (default)
Off	Multipoint (as a “slave”)

S3-5: DTE RS-232 Initiation of Local Loopback Test

Set position 5 of switch S3 to determine whether or not the attached DTE can initiate the Multi-Function LD Card’s local analog loopback test by raising the Local Loopback (LL) signal on Pin 18 of the RS-232 interface.

S3-5	DTE Initiation of Local Loopback
On	Enabled
Off	Disabled (default)

S3-6: DTE RS-232 Initiation of Remote Loopback Test

Set position 6 of switch S3 to determine whether or not the Multi-Function LD Card’s remote analog loopback test can be initiated by raising the Remote Loopback (RL) signal on Pin 21 of the RS-232 interface.

S3-6	DTE Initiation of Remote Loopback
On	Enabled
Off	Disabled (default)

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Contents Multi-Function LD Cards FCC Statements MULTI-FUNCTION LD Card NOM Statements Contents Specifications Connectors IndicatorsDiagnostics Temperature PowerWeight FuseOverview FeaturesIntroduction Introduction Main-module switches Setting the Switches on the Main ModuleSwitch S1 Summary On and OFF settings of the DIP switchesS1 Position 7 Protocol S1 Positions 1 through 4 Data-Rate SettingS1 Positions 5 and 6 Clock Source S1 Position 8 Carrier-Control Method Switch S2 SummaryS2 Position 2 2-Wire vs -Wire Operation S2 Positions 4 and 5 RTS/CTS Delay S2 Position 3 V.52 and V.54 Diagnostic TestingS2-6 Signaling-Rate Range S2-7 and S2-8 Word LengthS3-1 and S3-2 Input Impedance Switch S3 SummaryS3-4 Mode Selection Recommended Impedance SettingsS3-5 DTE RS-232 Initiation of Local Loopback Test S3-6 DTE RS-232 Initiation of Remote Loopback TestS3-7 and S3-8 Antistream Control Setting the Jumpers on the Interface ModuleFour interface modules Jumper locations Line Interface Line Shield Connection to Frame Ground JB2 Summary of Interface-Module Jumper FunctionsJB5 Serial Interface Signal Ground and Frame Ground JB4MicroRacks An Overview InstallationMicroRacks’ Power Supply Installing the Multi-Function LD Card in the MicroRack Pinout of the 10-Pin RJ Interface RS-232 Serial Cables and ConnectorsPinout of the RS-232 Interface Modem-to-Modem Line Cables and Connectors AT&T standard modular color codes Line-Cable PinoutsMultipoint Applications Two-pair star wiring for host and slave CardsStatus LEDs Operation and DiagnosticsRTS and CD Indicators Diagnostic Testing Using the Error LED Power-Up V.54 and V.52 Diagnostic Tests Remote Digital Loopback RDL Using the V.52 Bert Test Independently Shipping and Packaging TroubleshootingCalling Your Supplier Appendix Cable Recommendations Wire Gauge Capacitance ResistanceMULTI-FUNCTION LD Card Copyright 1995. Black Box Corporation. All rights reserved