Data port – AT&T CL2909 User Manual
Page 15
Advertising
Getting started
9
Data port
If you want to connect another device (such as a modem or fax machine) to
the wall jack, use the jack on the telephone labeled
DATA. A call picked up at
another extension connected with the same line may interrupt a fax, modem
or message transmission.
DATA
TEL
Data port
Advertising