User's Guide Faxing 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 74 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. 70