Product Introduction:
IP Phone / Voip Phone is provided by Shanghai Guoyi Development Co., Ltd.,a major Network Communications supplier in Broadcast & Telecom wholesale industry in China.You can check out the specification of IP Phone / Voip Phone below or get any optional result clicking into the following keywords Ip Phone , IP Phone / Voip Phone , GYTZ-320 , Description , Features , Details and you can check the authentications and testimonials of IP Phone / Voip Phone .
Description:
Protocol:
1) SIP call signaling-FC3261 with backward compatible with RFC2543
2) RTP (RFC1889), RTCP (RFC1890)
3) SDP (RFC2327)
4) NAPTR for SIP URI lookup (RFC2915)
5) Messaging Waiting Indicator (RFC3842)
6) DHCP
7) PPPoE
8) Web management
9) TFTP for auto provisioning
Voice processing:
1) CODEC: G.711 (a-law and u-law), G.723.1A and G.729A, G.729AB
2) Acoustic echo cancellation
3) VAD (voice activity detection)
4) CNG (comfort noise generation)
Call features:
1) Mute stop or resume voice transmission
2) Volume adjustment: +/- the volume of handset, speaker and ringer
3) Message LED: 2-color LED message indication
4) DTMF relay: supports in-band RTP voice mixing and out-band DTMF over RTP (RFC2833)
5) Speaker phone, handset-free, and ear phone supported
6) Calling/called Caller ID
7) Dial tone, DTMF generator, ring back tone, busy tone, disconnect tone, and ring tone
8) Redial
9) Call forwarding
10) Call waiting
11) Call hold
12) Call transfer based on draft-ietf-sip-refer-07.txt
13) Call rejection
14) Call screening
15) 3-way conference on the phone
16) Auto redial
17) Speed dialing
