Getting started
Add a corded headset
You can use this telephone handsfree when you install any industry-standard 
2.5mm corded telephone headset (purchased separately). For best results, 
use an AT&T 2.5mm corded headset. To purchase a headset, visit our website 
at 
www.telephones.att.com, or call 1 (888) 915-2007. In Canada, 
dial 1 (866) 288-4268. See page 41 for instructions on using the corded 
headset with this telephone. 
Plug a 2.5 mm headset into 
the HEADSET/AUX IN jack on 
the side of the telephone base.
Side view of the telephone base
NOTE: If you have corded and cordless headsets connected to your telephone base, theIf you have corded and cordless headsets connected to your telephone base, the 
HEADSET button only controls the corded headset. 
To add a corded headset to the telephone base
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