7.4 CDMA

In the U.S., Code Division Multiple Access (CDMA) is a popular cellular technology that's an alternative to GSM. CDMA uses Spread Spectrum Technology (SST), which allows a unique code to be attached to each conversation and to spread conversations across wide segments of the cellular broadcast spectrum. Each receiver decodes on the same frequency segment as the sender. Because multiple signals can be transmitted over the same spectrum, CDMA allows many more possible conversations when compared to other cellular technologies. Sprint PCS and Verizon Wireless use CDMA.

7.4.1 Connecting via Express Network

The Motorola v120e (Figure 7-10) is a data-capable phone that can connect to a CDMA2000 1xRTT network. Although it doesn't have Bluetooth (at the time of this writing, few Bluetooth-enabled CDMA phones were available), you can connect it to your Mac using a USB cable and get online at speeds faster than those currently available with a GPRS phone.

Figure 7-10. Plugging a Motorola v120e into a Macintosh PowerBook

To use this phone as a modem:

  1. Obtain a data cable. Your best bet is to get one that is made by the manufacturer of your phone. We used the Motorola SKN6311B USB Data Cable with the v120e.

  2. Download the VZW_Generic_1X_ON_230400 script from the Modem Scripts section of the maccellphone Yahoo! group Files page (http://groups.yahoo.com/group/maccellphone/files) and copy it into /Library/Modem Scripts. If you have trouble obtaining this script, you can skip this step and use the Sprint PCS Vision modem configuration, described later.

  3. Make sure the System Preferences application is closed. Plug the phone into your Macintosh and be sure that both the phone and the Mac are turned on. You should hear a sound (two beeps) from the phone.

  4. Open System Preferences and select Network. The New Port Detected dialog will appear, as shown in Figure 7-11. Click OK.

Figure 7-11. Mac OS X detecting the newly-connected cell phone
  1. From the Show menu, select Motorola V.120e. Click the PPP tab and enter your information. Your Account Name should be your phone number followed by @vzw3g.com, your password should be vzw, and the phone number should be #777, as shown in Figure 7-12.

Figure 7-12. Setting up an Express Network connection
  1. Select the Modem tab, and set your Modem to 1_VZW_Generic_1X_ON_230400, as shown in Figure 7-13. (If you can't locate that script, or if it gives you trouble, you can use the Sprint PCS Vision Modem configuration, which is included with Mac OS X.) Click Apply Now to apply the configuration.

Figure 7-13. Selecting the modem type for the Express Network connection
  1. Return to the PPP tab and click Dial Now. The Internet Connect window will appear, as shown in Figure 7-14. Click Connect to dial.

Figure 7-14. Using Internet Connect to dial the Express Network

The steps will be similar for other phones, as well as for Sprint's PCS Vision network, which also uses CDMA2000 1xRTT. Contact your cellular provider for such details as username, password, and the phone number to dial.