AT&T 1040 Installation Guide download pdf (Page 23)

Optional headset (purchased separately)

For hands-free telephone conversations, use any industry-standard 2.5mm

headset (purchased separately). For best results, use an AT&T 2.5mm

headset. To order an AT&T 2.5mm headset, visit our website at

www.telephones.att.com

or call 1 (800) 222-3111. In Canada, dial

1 (866) 288-4268.

NOTE: If the sound quality of the headset is unsatisfactory, try unplugging it,

and firmly plugging it in again.

Plug a 2.5mm headset into

the HEADSET jack on the left

side of the telephone base

(beneath a small rubber flap).

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AT&T 1040 Installation Guide Page 23