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Purchasing quantities of 3+ ? For bulk pricing call us at 1-866-748-3526 or send an email to

Rotary volume control
Manual operation-lift handset to operate headpiece
Mute button
One Touch Operation: Available for the following Telephone models.
AT&T Definity Callmaster V, VI
2420 Series & 302D
6416D+M, 6424D+M

Package includes: a volume control, a mute function, and a 10-foot cord with quick disconnect feature

Purchasing quantities of 3+ ? For bulk pricing call us at 1-866-748-3526 or send an email to

This One Touch Adapter (SOTA) connects into the adjunct port of Avaya 8400 series telephones enabling a simple one-touch answer feature for the headset.