Apple Performa 6400/180 - Manual (Page 93)

Troubleshooting Symptom Charts/Modem - 19
Modem
Communications
software doesn’t work
with newly installed
modem.
Some Performa 6400/180 and 6400/200 computers shipped
with internal GeoPort modems and some with internal Global
Village modems. If the modem wasn’t replaced like-for-like, the
communications software is incompatible with the modem.
Identify the modem originally shipped in the computer by the last
three characters of the serial number found in this table.
If the wrong type of modem has been installed in the computer,
replace it with the type of modem originally shipped in the
Modem
6400/
180 6400/
200
Global Village Platinum 7U7 836
GeoPort 95R 95S