Ricoh 3800C Operating Instructions Manual page 287

Optional Equipment
Fax Function Upgrade Unit
JBIG compression for transmission/reception becomes possible.
You can extend the following features.
Function
Quick Dial
Memory Transmission file
Auto Document
Specific Sender
Program
Operating InstructionsFacsimile Reference (option) <Advanced Features>
Without optional Fax Function Upgrade
Unit
400
400
6
30
100
With optional Fax Function Up-
grade Unit
1,200
800
18
50
200
287