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If you are anything like me, you have probably encountered an annoying telemarketer just as you sit down for a meal. Caller ID has helped to reduce this menace. With an inexpensive box, you can instantly discover the identity and phone number of the offending caller. But, did you know that your Mac can read and understand caller ID information too? This week's tutorial is the first in a three part series which will show you how to build a simple caller ID (CID) application with REALbasic. Now, before you ask why someone would want to replace a twenty dollar caller ID box with a thousand dollar computer, keep in mind that your Mac is capable of doing much more than a caller ID box. For example, your Mac can:
Sure, there are several caller ID applications on the market, but what fun would that be? Armed with this tutorial, a copy of REALbasic, an old modem, and an even older Mac, you can read the caller ID information yourself and do with it whatever you wish. Tutorial Schedule Since this tutorial is somewhat technical in nature and requires both hardware and software knowledge, we will split it up over three articles. The weekly schedule for the tutorial:
What You'll Need To complete this project, you will need the following:
A copy of REALbasic. If you are reading this tutorial, you are probably already a REALbasic user, but if you aren't, download a copy from REAL Software. A Mac. This part of the project is wide open. You can use one of many different kinds of Macs for this project. This project lends itself nicely to old machines. Caller ID data doesn't require much processing power at all and old Macs have the necessary serial inputs for interfacing with a modem. In fact, even a 68K machine would be right at home for this application. Now would be a good time to go dig that old Performa or Quadra out of your closet and give it a new life. For example, I will be using a 6360 and a 5260 as test machines for this tutorial. A caller ID compatible modem. This may be the trickiest part of preparing for the tutorial. You will need a modem that is capable of receiving caller ID data. Not all modems have this feature, but many do. The bad news? iMac modems and most modems in New World Macs do not sport this feature. The good news? Many old (and slow) modems do have this feature. The speed of the modem does not make any difference here, since the amount of data being transferred is minimal and the caller ID specification provides for data tranfer speeds that are many times slower than even 14.4 modems. Check your modem's documentation to learn about its caller ID abilities (or lack thereof). For example, I will be using a USRobotics 33.6 Sportster modem as the test modem for this project. Modem documentation. Although not absolutely necessary, it is often helpful to have your modem's documentation on hand. There are standard commands for communicating with modems, but you may find subtle differences in the implementation of these standards. The documentation for your modem will clear up any discrepancies. If you managed to toss your documentation in the trash, look around on the web. Many companies post the documentation for their equipment in electronic formats (usually pdf). Now what? Once you have collected the necessary hardware and software for this project, take a glance at some of the caller ID information available on the web. Caller ID FAQ Don't worry if some of this information doesn't make sense just yet. We will talk about it in more detail next week. This information is really just to get your feet wet. See you next week! |
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