Versitron F2702 Technical Manual

13, Page 8 www.versitron.com 2.3.4 Default Jumper The remaining jumper (JP3) is set in the default position and should not be removed. This jumper, if removed, will cause the Modem not to work properly. J3 DS1 DS6 DS3 DS4 DS5 P1 J1 J4 F1 Y1 1 U1 DS2 RX TX MADE IN USA VERSITRON JP5 ON 4321 SW1 J…

15, Versitron F2702 Page 10 www.versitron.com Interface SW1-2 SW1-3 Pin Number Signal Designation Color 1 RX+ Orange w/ White Line 2 RX− Orange 3 TX− Green w/ White Line Normal Phase/Polarity Off Off 6 TX+ Green 1 RX− Orange w/ White Line 2 RX+ Orange 3 TX+ Green w/ White Line Inverted Phase/Polarity On On …

14, Page 9 www.versitron.com 2.5 INTERFACE WIRING Tables 7, 8, 9 and 10 list the interface wiring for Model F270X FOM II Series Modems. The RJ11 (J4) is used with a single line 2-wire telephone. Wiring for (J4) is shown in Table 7. The modular connector (J3) is wired in parallel with t…

20, Page 15 www.versitron.com SECTION 5 MAINTENANCE AND TROUBLESHOOTING 5.1 INTRODUCTION This chapter contains general information designed to isolate a malfunction in the Model F270X to a replaceable unit. These units are not equipped with redundancy. Therefore, a failure in one of these un…

19, Page 14 www.versitron.com 4.3.6 RS-485 / RS-422 Data Transmission Circuit In the data transmission circuit, a RS-485 / RS-422 interface IC, U18, is used. This IC takes in a balanced data signal and converts it into a TTL signal. The TTL data signal is then fed to the CPLD, where i…

12, Page 7 www.versitron.com 2.3.1 RS-485 / RS-422 Data Transmission Settings (cont’d) Slew rate for the data being transmitted: Jumped* Functional Description JP4 2 & 3 Slew rate set to 10Mbps * Note: Factory setting. Do not change. TABLE 3: JP4 JUMPER SETTINGS 2.3.2 Fiber Optic or Co…