Trimline with CID/CW BLACK Trimline with CID/CW BLACK The AT&T Trimline TR1909 Corded Phone with Caller ID is ideal for people who live a lifestyle on the go. This phone conveniently allows you to see who's calling with built-in caller ID so you never have to pick up calls from strangers again. For added convenience this phone has the ability to be mounted to a table or to a wall. This wall mountable telephone features handset and ringer volume controls which allow the users to set the desired level.