Epson EcoTank ET-4550 - Manual (Page 65)

Connecting to a Standard Phone Line (PSTN) or PBX
Connect a phone cable from the telephone wall jack or PBX port to the LINE port on the back of the printer.
Related Information
& “Making Settings for a PBX Phone System” on page 69
Connecting to DSL or ISDN
Connect a phone cable from the DSL modem or the ISDN terminal adapter to the LINE port on the back of the
printer. See the documentation provided with the modem or the adapter for more details.
Note:
If your DSL modem is not equipped with a built-in DSL filter, connect a separate DSL filter.
User's Guide
Faxing
65