two RCA connectors: line in for digitizing, line out for audio monitoring of incoming calls
two RJ11 telephone jacks: one to the phone line, the other to a local telephone
audio can be recorded and played back through the local telephone too
an attached fax machine can be used as scanner
voice compression feature
record and play back of voice and fax messages remotely
schedule sending faxes
multiple PhonePaks can be installed for multiple phone lines
multiple PhonePaks can share mail boxes
in order to use the PhonePak in an A3000 or A4000, a Zorro II RAM expansion has to be added in another slot because these machines have problems with Zorro II DMA to Chip RAM