NEC ViVid Office 2020 Quick Reference Manual page 28

Features
PC-Fax Function Features
To use PC-Fax Function, the optional Fax Kit is required.
PC-Fax
Refer to "Operation Manual (PC-Fax)"
You can fax data created with a PC directly from
the PC.
Communication
User PC
Telephone
Line
Facsimile
Facsimile
Terminal
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