The possibility of recording 4 SIP accounts, also as a backup
The ability to simultaneously login to all servers
Voice Codecs: G.711a / u, G.7231 high / low, G.729a / b, G.722, G.726, iLBC, AMR-NB;
Video codecs: H.263, H.264, MPEG4
Video resolution: QCIF, CIF, QVGA
Photo Format: PEG GIF and BMP PNG
Video formats: MP4, 3GP and FLV
Echo cancellation: G.168 compatible with the LEC, including hands-free (AEC)
VGS, VAD, CNG, jitter buffer
Possibility of registering a domain or implementation of SIP calls peer to peer
Modes DTMF inband, SIP info, RFC2833
Can be used for custom ring tones
Adjusting the volume in all modes (headset / handsfree / headset wire / bell)
HD voice with high quality headset / HD voice in speakerphone mode
