1200 BPS DCM-212 Modem (260-1385A) Cables Faxback Doc. # 5954 CONNECTING THE DCM-212 Your DCM-212 is compatible with Bell systems 103 and 212A when connected to the telephone lines via a modular connector. The RS-232C input/output of the modem interfaces directly with the RS-232C equipped Tandy computers. TELEPHONE CONNECTIONS Please note that each product connected to the telephone line places a certain load on the line. We designate this as the unit's "Ringer Equivalence Number." When using more than one product on the line, total all the ringer equivalence numbers. If they total more than five, your phone might not ring. In rural areas a total of three might impair ringer operation. to be sure, check with your local telephone company. The registration number as well as ringer equivalence number appears on the bottom of the unit. The way you connect the DCM-212 to a telephone depends on how your telephone is connected to the wall. 1. Remove your telephone's plug from the modular wall jack, and insert it into the PHONE jack on the rear of the modem. 2. Plug the modem's WALL JACK phone line cord into the modular wall jack. If you telephone has the older style, four-prong connection, use an adapter (Radio Shack 279-360) to connect the four-prong connection to your DCM-212. NOTE: You can not connect the modem to coin-operated phones or party-line phones. If you are using a multi-line phone, see (Multi-Line Connection." If you plan to use the DCM-212 in automatic mode only, you do not need to use a telephone. If your telephone is wired directly to the wall you can purchase the jacks and adapters necessary for the conversion from your nearest Radio Shack store. Or, you can contact the telephone company to have modular connectors installed. The telephone company is authorized to charge you for the installation of such jacks. The U.S.O.C. number for the plug connection is RJ11C. MULTI-LINE CONNECTION You can use the DCM-212 modem with a multi-line telephone, but you might need a multi-line adapter (43-271), a hardware modification to the modem, or both. If you use only a multi-line adapter, the HOLD button on an extension phone can interfere with communication if someone presses it. To avoid this problem, have a qualified Radio Shack service technician modify the DCM-212. Radio Shack has several adapters that you can use to connect the DCM-212 to multi-line telephones. Contact your Radio Shack Computer Center or store for details. COMPUTER CONNECTIONS The DCM-212 Modem uses the RS-232C standard serial interface cable to connect to your computer. The table below provides the cable requirement for Tandy computers. If you need more detailed information, refer to your computer's owner's manual. TABLE 13. MODEM-TO-COMPUTER CABLES COMPUTER CABLE CATALOG NUMBER Model I 26-1145 Model III/4/4D/4P/12/16B/ 16B HD/DT-1/DT-100/100 26-1408 Tandy 102/200/600/1000/1200/ 1200HD/2000/6000 26-1408 Tandy 3000/4000/1400LT/1000TX 26-1399 Model II/16 26-4403 1. Plug the appropriate end of the interface cable into the RS-232C standard DC-25 jack on the rear panel of the modem. 2. Plug the other end of the cable into the computer's DB-25 jack. To connect your DCM-212 to the following computers, you'll need option boards that contain an RS-232C interface. Contact your Radio Shack Computer Center for details. TABLE 14. COMPUTER OPTION BOARDS COMPUTER BOARD CATALOG NUMBER Model I RS-232C Interface Board with cable 26-1145 Tandy 1000 RS-232C Option Board 25-1006 Tandy 1000EX,HX,SX,TX PLUS RS232C Interface Board 25-1031 Tandy 1000/3000/4000 Serial Parallel Adapter 25-4034 Tandy 1000/3000/4000 Dual-Port Serial Adapter 25-4039 Tandy 1200 Captain Multifunction Board 25-3061 COLOR COMPUTER CONNECTIONS Use cable 26-1408 with the Deluxe RS-232 Program Pack (26-2226) for the DCM-212 to Color Computer connection. POWER SOURCE Insert the AC adapter's plug into the AC power jack on the rear panel of the modem. Plug the adapter into an electrical wall outlet or an approved power strip. Be sure to connect the adapter to the modem before you plug the adapter into the wall outlet. Otherwise, damage to the adapter could result IMPORTANT NOTE: Use the supplied UL-Listed adapter only. Another type of adapter could damage the modem. (dkh-08/04/93)