Some IVR (Interactive Voice Response) systems will not always respond to DTMF (Dual Tone Multi Frequency) digits dialed on a Polycom phone.
To overcome this problem we have provided a DTMF level adjustment available for users of Polycom phones. Access the Star2Star portal. Navigate to the "Individual Phone Settings" for the required phone (see example below).
Click the Phone Options link in the "Individual Phone Settings" menu (see example below). The DTMF Tone Level? is set by default at -15 db. Change this setting to -10 db (higher tone level setting). After making changes on this page, please remember to Save Changes to System and reboot the phone.