Help Button Online Help gives users information about the phone keys, buttons, and features. For added security, the audible dual tone multifrequency DTMF tones are masked when the speakerphone mode is used. Inactivity period is configured by the system administrator. System administrator can designate separate VLANs Both wideband G. Volume Control Provides easy decibel-level adjustments for the speakerphone, handset, headset, and ringer. Agfeo st 22 pdf to word The handset is hearing aid-compatible. Additional volume control gain can be achieved[…]