Telenetics DSP 9612 Connecting to a Transmission Line, Shows the transmission line interface

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Installation

Connecting to a Transmission Line

The modem has a transmission line interface that can be configured for 2- or 4-wire, analog connection, where one pair is used to transmit data (Tx and Tx) and one pair is used to receive data (Rx and Rx). Table 2-7 shows the pin numbers and corresponding signals for the modem.

Figure 2-4 shows the transmission line interface.

Note: For communication to occur, the Rx line of one modem must connect to the Tx line of the other modem. The modem’s Tx/Rx pair are non-polarized.

Note: The modem does not support leased-line operations with DC current.

Table 2-7. Transmission Line Connector Pin Assignments


This Pin Number…	Corresponds to This Signal…
1	Rx

2	Rx

3	Tx

4	Tx

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Contents DSP 9612 Flash Poll Modem User’s Guide Contents Contents Chapter Introduction Features Applications Network of Multipoint ConfigurationIntroduction Unpacking Your Hardware Chapter InstallationAdditional Items You Need Hardware Overview InstallationFront View Finding a Suitable Location Installation SummaryConfiguring the Modem SW1 DIP Switch Settings SW1-1 through SW1-4 − Transmit Level SW1-5 − Receiver Dynamic Range SW2 DIP Switch Settings SW2-1  FSK Mode SW2-3  FSK Soft Carrier Bell 202 FSK Mode Only SW2-6  FSK CD Delay Bell 202 Mode Only SW3 DIP Switch Settings SW3-1 − Fast Poll Auto Rate/FSK SW3-2 − Data Rate Fast-Poll Mode Only SW3-5 − Transmitter Termination SW3-8 − Carrier Control Shows the transmission line interface Connecting to a Transmission LineTransmission Line Interface Connecting to a Voltage SourceConnecting an RS-232 Device DLB LEDsIllustrates these three diagnostics Loopback Control SwitchProblem Solving Appendix a TroubleshootingProblem Appendix B DIP Switch Summary DIP Switch Summary General Specifications Appendix C SpecificationsPower supply Mechanical SpecificationsInterface Connector Pin Assignments RS-232 DTE Interface Environmental SpecificationsCompliances Specifications Appendix D Compliances Department of Canada Statement Appendix E Limited Product Warranty Return Merchandise Authorization RMA Procedure Appendix F RMA ProcedureRMA Procedure