Outputs (host → device)

• LEDs / Off-Hook
• LEDs / Mute
• LEDs / Ring
• LEDs / Hold
• LEDs / Microphone
• Telephony / Ringer

Inputs (device → host)

• Telephony / Hook Switch
• Telephony / Line Busy Tone
• Telephony / Phone Mute
• Telephony / Flash
• Telephony / Redial
• Telephony / Speed Dial
• Button / Programmable Button
• Telephony / Key Pad