VOIP Service Providers Residential
Hebei huawo steel structure co.,LTD
Search agent & cooperation:
We are manufacturer. We produce:
All kinds of TV tower, Communication towers, power tower, etc.
All kinds of steel structures.
www.huawosteeltower.com
Alsophila International (HongKong) Limited
Alsophila International (HongKong) Limited
Whoch Software & Technologies Ltd
we are selling a cheap and low rate interntional card, users can achieve phone to pc function and free calls ,welcome to contact us.
Yeastar Technology CO., Ltd.
Yeastar specializes in the developing and manufacturing IP-PBX products and is committed to the distribution of new generation technology products in the field of enterprises'' communications.
Zhengzhou Great Electronic Tech Co.,Ltd
We are specialized in manufacturing IP phone and IP camera. Contact me if you need, skype: lxhzspy
Zycoo Co.,Ltd
Zycoo is a professional manufacturer of VOIP, IP PBX products, IP phones, telephony cards etc
KuanMai Communtion Tech Co,.Ltd
Our Factory at XiaMen ,and our product have ipphone,ipphone+fxo,ipphone+fxo+poe,poe switch ,poe injector,por splitter.and my office at shangahi ,we main work is sell product,do voip biz, wholesale ect..
MyCowry Apparel Co.,Ltd
Fanvil Technology Co.,Ltd
Fanvil Technology Co., Ltd. is a professional developer and manufacturer of VoIP products like VoIP Phone,IP gateway, IP PBX,
Skyvia Telcom Communications Co., Ltd
Skyvia Telcom is an international voice wholesale carrier
In 1998, the Internet Engineering Task Force (IETF) published the specification for a Session Description Protocol or SDP as a format that describes parameters for streaming media. The original IETF Proposed Standard was updated in 2006 as RFC 4566. Although the SDP was created as a feature of Session Announcement Protocol (SAP), it can be used with Real-time Transport Protocol, Real-time Streaming Protocol (RTSP), and Session Initiation Protocol, as well as a standalone protocol. Parameter negotiation, session announcement and session invitation are included in the descriptive sessions from the SDP protocol. Rather than transmit data like other types of protocols, an SDP negotiates between media type endpoints, format and properties involved. A session begins when a connection is established, and the session is terminated only after every endpoint is no longer participating.
Shenzhen RealTone Technologies Inc.,
Real Tone Technologies Co., Ltd is a professional manufacturer of innovative VoIP equipments and unified network communication solutions. We offers a full line of VoIP products including All in one IP PBX phone system, VoIP gateways, E1/T1 PRI trunking
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