For AT&T SB67118 4-Line Corded/Cordless with Speakerphone Telephone / Lines 1 through 4 appear on handset / Handset speakerphone
Small Business System 4-Line Accessory Handset further enhances the 4-Line Corded/Cordless with Speakerphone Telephone in that you can take four phone calls without being restricted to you desk. Along with push-to-talk which instantly connects you to an entire network, so you don't have to listen to the dial tone when needing a quick solution for a simple issue, or for having conferences at a moments notice
•Lines 1 through 4 appear on handset
•Handset speakerphone
•Push-to-talk
•Up to 50 name/number Caller ID history (subscription service may be required)
•Up to 100 name/number phone book directory
•Handset volume control
•Ringer volume control
•Low Battery indicator
•Intercom
•Mute
•Redial
•Hold
•Display dial
•Up to 10 number speed dial
•Up to 10 (last) number redial