- Three-way Calling (Conference)
- Voice Activity Detection
- Comfort Noise Generation
- Packet Loss Concealment
- Adaptive Jitter Buffer
- Echo Cancellation
- Background Noise Suppression
- Call Waiting
- Call Duration
- Call Forwarding
- Hearing Aid
- Call Pick-up
- Speed Dial
- Do Not Disturb Setting
- Indicator
- Off-hook Call Placement
- Call Log
- Date and Time
- Multilingual Menu
- Security
- G.711 u/A
- G.729A (Annex B)