- Voice Mail
- Multilingual Menu
- Hands-free
- Echo Cancellation
- Noise Reduction System
- Voice Activity Detection
- Comfort Noise Generation
- DTMF Detection and Relay
- Adaptive Jitter Buffer
- Packet Loss Concealment
- Hearing Aid
- Call Share
- Call Duration
- Call Waiting
- Call Transfer
- Call on Hold
- Call Forwarding
- Call Pick-up
- Calling Party Information
- Speed Dial
- Automatic Redial
- Missed Call Indicator
- Do Not Disturb Setting
- G.711a
- G.711u
- G.722
- G.722.1
- G.722.1C
- G.729ab