There are several options for modems and Ethernet cards for the Macintosh 630 family of computers (Quadra 630, LC 630, or Performa 636).
- Install the Apple CS Ethernet 10BASE-T or AAUI option in the Communication Slot and then add an external high speed modem.
- Install the Apple Express Fax/Modem in the Communications Slot and the LC Ethernet Card to the I/O Expansion (LC PDS) Slot.
The Macintosh 630 family of computers only has one Communication Slot, therefore you cannot add both the internal Apple Express Fax/Modem option and Communication Slot Ethernet card.
The following computers are in the Macintosh 630 family: Performa 630, Performa 635, Performa 636, Performa 637, Performa 638, LC 630, and Quadra 630.