Plain Paper Fax / Copier generates 20 multiple copies, as well as enlarges, reduces & collates. Fax machine is Caller ID compatible with two lines of up to 16 characters available in the display for the name & number of your incoming callers. Automatic fax / phone switching eliminates the need for an extra phone line by connecting an external answering device (sold separately) to receive voice & fax messages on one phone line. Plain Paper Fax / Copier actually distinguishes between fax & voice calls. Offers Caller ID Waiting, monitor speaker phone, 10-sheet automatic document feeder, out-of-paper reception system, modem speed of 9.6Kbps & distinctive ring detection. Fax memory holds up to 24 pages (300KB). Automatic document feeder offers a 10-page capacity. Paper tray holds 20 sheets.