In order to identify the type of modem a Macintosh Performa 6400 series computer contains, use any of the following information:
1) Check the last three characters of the serial number and compare it to the information below:
| Computer | Part Number | Last 3 Characters of Serial Number | Modem Included |
| Performa 6400/180 | M5167LL/A | 7U7 | Global Village |
| 838 | Global Village |
| 95R | Geoport |
| Performa 6400/200 | M5168LL/A | 836 | Global Village |
| 95S | Geoport |
2) Compare the manuals in the "Using Your Modem" package (which was included with your computer) with those described below:
| Global Village Modem | Geoport Modem |
| Read Me First: About Your Modem | Apple TeleCom Manual |
| TelePort Platinum V Telecommunications Card User's Guide | Using Your Modem, Fax, Internet, and Other Telecommunications Programs |
| Apple Address Book: User's Guide |
| Apple Fax: User's Guide | |
3) Within the Communications module in ClarisWorks, type ATI1 and compare the results obtained to the list below:
| Result Codes | Modem Installed |
| 240 | Global Village Platinum 28.8 |
| 0 | Apple Geoport 28.8 |
| 255 | Global Village 14.4 (should not be included in Macintosh Performa 6400 computers) |