Print speed
The maximum number of pages a fax can print per minute. Typically, the speed is somewhat lower than that of printers using the appropriate technology (laser, inkjet, etc.), however, the tasks facing the fax owner are somewhat different.
Number of print tones
The number of shades of grey that the fax print module can display on paper. Standard for an average fax is 64 shades, 128 and 256 for more expensive models. Quite `low cost` options, which are almost never used today, support 32 or even 16 shades.
Received Fax Memory
The number of received/queued/sent pages that fit in the fax memory. Often used to send a delayed message, or to print out with a delay if the fax runs out of paper.
Phone features
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Caller ID. Automatic caller ID. Allows you to find out the number of the caller and/or sender of the message.
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Speakerphone. The ability to conduct a telephone conversation without using a handset, including — at a considerable distance from the fax.
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Answering machine. The ability to leave a voice message for a caller who wants to send you a fax, as well as the ability to leave a response voice message.
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Autodial. The ability to send a fax even in the absence of its operator — when the line is free or available.
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Notebook. Allows you to store several numbers of recipients in the fax memory, quickly organize the reception / sending of messages, and also make mailings to several recipients at the same time (during one session).
Paper/cartridge replacement indicator
Lets you determine whether the cartridge needs replacing and whether the paper in tray needs replenishing (or inserting a new roll).
Auto feed tray capacity
The larger the capacity of the tray, the less often you have to worry about refilling paper in it.
