COURIER HST CHAPTER 2 SET-UP AND TESTING Figure 2.1 -- Courier HST PACKAGE COMPONENTS The Courier HST package contains the following items in addition to this manual: o The Courier HST modem o An RJ11C phone cord o A power adapter o A Quick-Reference card, in the manual o Your warranty card, to be filled out and returned to USRobotics, Inc. OPERATIONAL REQUIREMENTS The Courier HST has minimal operational requirements. Be sure to read the information in the front of this manual about radio and television interference and connecting to the phone company. In addition, you should be aware of the following: o Follow the operating instruction in Appendix E-4 if the modem is to be used in either of the following types of installation. 1) The modem will be installed in a key system PBX in which RJ12 or RJ13 jacks are used rather than the RJ11 jack. 2) The modem will be attached to a user-installed phone line or a line leased from the telephone company. Often referred to as dedicated or private, this type of line is used for a direct, continuous connection between two modems. The connection is made without dialing. o If the modem is installed in a Hewlett Packard system, be sure to follow the instructions in Appendix E-5. o If you're working with a computer rather than a terminal, communications software is required to put 2-1 COURIER HST the computer in Terminal Mode. Some communications programs do this automatically when you load the program, while others require typing a function key or other operation. If necessary, refer to your communications software documentation for instructions. RS-232C Connector Requirements You'll need an RS-232C cable to connect the modem to your computer or terminal. Use a shielded cable to ensure minimal interference with radio and television reception. The modem takes a DB-25P (25-pin plug, or male) connector, but computer equipment varies. Check the serial port at the rear of your machine, labeled MODEM, COMMUNICATIONS, EIA or with a phone symbol. (Don't use the port marked PRINTER or AUX.) The port will be either a socket (female) or plug (male) that typically accommodates 25 or 9 pins. For example, the port on the IBM PC, XT and some compatibles is a plug that takes a DB-25S (socket) connector. The port on the IBM AT and some compatibles is a plug that takes a DB-9S (socket) connector. NOTE: Appendix B-1 defines the RS-232C pin assignments required to operate the modem. Be sure to check the appendix if you're not sure what type of 25- or 9-pin connector you need, or if you're building your own connector. If your machine has other than a 25- or 9-pin port, check your documentation to see what type of RS-232C connector is required. ASSEMBLING THE MODEM 1. Turn off the computer or terminal and its peripheral devices. 2. Examine the label on the bottom of the modem. In addition to the summaries and other information, the label contains icons to aid in modem assembly. Check the interfaces at the back of the modem, shown in the following photograph. Figure 2.2 -- Interface End, Courier HST 3. Now review the attached interfaces in Figure 2.3. Figure 2.3 -- Connected Courier HST 4. Check to make sure that the power switch is OFF; press it towards the zero in the 1/0 icon on the bottom label. Then plug the small end of the power supply cord into the power 2-2 COURIER HST jack at the back of the modem, and plug the power adapter into a standard 115-volt AC wall socket. Disconnect your present phone cable from the wall jack. Plug one end of the phone cord that came with the modem into the wall jack, and the other end into the phone jack near the wall-jack icon. NOTE: Older telephone installations may not have the appropriate modular wall jack and plug. Adapters and RJ11C connectors are available from your telephone company or computer dealer. If you want to keep your telephone connected for conventional calls, plug its cord into the jack near the phone icon. You can also use both your telephone and modem in one call, although not at the same time. Appendix E-1, Using Both Voice and Data Communications, explains how to switch control of the phone line between the phone and the modem. 5. Next, check the positions of the bank of Dual In-Line Package (DIP) Switches located at the back of the modem. These switches are set at the factory to the positions desired by most users, as shown in Figure 2.4. Figure 2.4 -- DIP Switch Factory Settings Use the guide on the bottom of the modem or refer to the more detailed summary in Appendix B-3 to determine if your situation requires different settings. If you're connecting the modem to a dedicated line or to a small interoffice or PBX system, review Appendix E-4 for special installation and operating instructions. 6. The final step is to connect the modem to the computer's or terminal's serial port with the RS-232C cable described earlier in this chapter. Attach the appropriate connectors to the modem and to the serial port. NOTE: When you are using the modem, be sure not to cover the vents on the top of the case. The modem is now ready to be tested and operated. TESTING To verify that your modem is working properly, follow these steps: 2-3 COURIER HST 1. Turn on your computer or terminal and clear the screen. Then turn the Courier's power switch ON. These front indicator LEDs will light up: CD Carrier Detect (if you haven't changed the factory setting of DIP switch 6) TR Data Terminal Ready (if you haven't changed the factory setting of DIP switch 1) MR Modem Ready/Power RS Request to Send, if your computer/terminal supports RTS on the RS-232C interface CS Clear to Send 2. If you're using a personal computer, load your telecommunications software and put your computer in Terminal Mode. This causes the computer to function as a terminal rather than a processor: everything you type at the keyboard goes directly to the modem. If necessary, refer to your communications software documentation for instructions. 3. Next, check to see if your machine and modem are communicating with each other by entering the command to get the modem's attention. Type either upper or lower case letters, not a combination. Enter every command to the modem by pressing the Enter key (Carriage Return), shown in the example between angle brackets. (Don't type the angle brackets.) Type the following: AT If everything is correct, the modem responds as follows: OK NOTE: The AT command is used alone to check the modem/terminal interface. AT is also the mandatory prefix for all other commands except A/ and A>, used to repeat execution of the command in the command buffer, and +++, the escape code. These exceptions are explained in Chapter 6. 4. The modem is shipped with DIP switch 4 UP, causing the modem to display (echo) your keyboard commands. If your typed command is not displayed, your local echo is OFF. To turn the local echo ON, send the modem the following command. ATE1 2-4 COURIER HST If double characters appear on the screen, both your modem and software are set to local echo ON. Either set your software to local echo OFF, or turn the modem's echo OFF with this command: ATE0 5. If no OK appears on your screen, check out the connections at the interface end of the modem. Then carefully review the previous instructions to see if you've missed something. For information on other testing such as the Analog Loopback Self-Test, see Appendix E-6. 2-5