Main Chipset

Advanced Digital Signal Processing (DSP) to ensure superb hi-fidelity audio quality, suit with the control of audio flutter and concealment technology anti-lost message.
Supports SIP 2.0
Supports codes G711(A-law and U-law), G.723.1 (5.3K/6.3K), G.726(40K/32K/24K/16K), G.729A/B, and iLBC.
Supports silence suppression and check VAD (Voice Activity Detection), CNG (Comfort Noise Generation), Line Echo Cancellation (G.168), and AGC (Automatic Gain Control)

Functions

Supports standard voice features such as Caller ID Display or Block, Call Waiting, Hold, Transfer Forward, FLASH, in-band and out-of-band DTMF, Dial Plans.
Supports three way call.

Spec

Interface:1 WAN