Black Box MD1641A, MD1640A manual Series II Intelligent DATA/FAX Modems

SERIES II INTELLIGENT DATA/FAX MODEMS

2.Attach your Modem to your PC or terminal with an RS-232 (or V.24) cable.

3.Connect telephone set to phone jack (if desired).

4.Attach your Modem to the AC Power transformer and plug t he AC connector into a live AC outlet.

5.Turn on power by flipping the "ON/OFF" switch at the left rear of the Modem to the "ON" position.

6.Assuming you have already chosen Dial-Up mode (DIP Switch #10 in the UP/OPEN position) or Leased Line mode (DIP-Switch #10 in the DOWN/CLOSED position, assign your modem to either “originate” or “answer” mode. It doesn’t matter which mode you select — just give the modem you’re connecting to the opposite setting. For example, if you place DIP-Switch #5 UP, that modem will be the answering modem. Then you should place DIP-Switch #5 DOWN on the other modem so that it will be the originating modem. Again, it doesn’t matter which is which, as long as the local and remote modems have opposite settings.

7.Verify transmit dBm levels. The transmit level for dial-up lines is - 11dBm. The transmit level for leased lines is -9 dBm and may be set alternately to -15 dBm with DIP-Switch #3.

8.Verify remote modem's current configuration settings with your Series II Modem in terms of data compression, error correction, transmission rate, etc. (per Chapter 5, Section 5.7.12, ATL5 and ATL7 Commands).

9.Make sure modem and computer/terminal serial port baud rates are adjusted. (Note that several programs can check this for you. If you have MS-DOS 5.0 or higher, a program called MSD.EXE (Microsoft Diagnostics) is in your DOS directory. Typing MSD at the DOS prompt brings up a screen that provides a variety of information about your computer. Select COM ports and it lists information about your com port, e.g., UART Type, Address, and IRQ to name a few. Once you know your serial port's UART type, you can set your communications's software appropriately.)

10.Verify self-test results (Section 2.2).

11.Proceed to Chapter 3 of this manual, or to your data communica- tions software manual.

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