D-Link 8-Port VOIP GSM

VOICE FEATURES:

• G.711A/U law, G.723.1, G.729A/B
• Silence Suppression & Detection
• Comfort Noise Generation (CNG)
• Voice Activity Detection (VAD)
• Echo Cancellation (G.168)
• Adaptive (Dynamic) Jitter Buffer
• Call Progress Tone Generation
• Programmable Gain Control