VoxEra

的VoIP与使用SIP协议的标准汽车的QoS要求

VoIP calls with auto QoS using the SIP protocol standards (both incoming and outgoing calls)

Connects directly to your preferred VoIP server (no need for any intermediary media servers)

Android OS: all versions from 2.0

Connection: WiFi or mobile GPRS, EDGE, 3G, 4G (all above 15 kbits)

Transport protocols: UDP, TCP, TLS, HTTP, VPN (with VoIP tunneling and encryption)

Built-in tunneling and encryption (for both the signaling and the media)

Peer to peer encrypted media

Audio Codec: G.711 (PCMU and PCMA), GSM, Speex, iLBC, G.729 (G.729 is restricted in the free version), HD Audio/wideband

Video Codec: H.264, H.263 (beta)

Automatic fine-tuning (including codec selection) depending on your peer capabilities, network speed and CPU power

AEC (acoustic echo canceller), Denoise filter, AGC (automatic gain control), PLC (packet loss concealment), Silence suppression

Multiple accounts

Detailed or simple configuration

System phone-book

Call history

Call recording

Balance and rating display, call timer, status logs, detailed logs

Multi-tasking support -listening for incoming calls in the background

Speakerphone, Mute and Hold

IM (chat), SMS

DTMF (RFC2833 or INFO method)

NAT/Firewall support, stable SIP and RTP ports, auto QoS, light STUN protocol and auto configuration

Call park and pickup

Call transfer (attended and unattended) and call forward

Conference calls (built-in RTP mixer and transcoding when necessary)

DNS SRV record lookups

Supported methods: INVITE , ACK, PRACK, BYE, CANCEL, UPDATE, MESSAGE, INFO, OPTIONS, SUBSCRIBE, NOTIFY, REFER

RFC’s: 2543, 3261, 2976, 3892, 2778, 2779, 3428, 3265, 3515, 3311, 3911, 3581, 3842, 1889, 2327, 3550, 3960, 4028, 3824, 3966, 2663, 3022 and other drafts

signaling and media engine