Yeastar Technology Co., Ltd China

Manufacturer of IP PBX , paperless fax, Skype gateways and Asterisk hardware cards.
MSN: lears@yeastar.com
SKYPE: yeastar.lears
Email: lears@yeastar.cn
lears@yeastar.com

Yeastar is a professional manufacturer that specializes in developing business solutions, such as IP PBX phone systems,
paperless fax solutions, Skype gateways and manufacturing Asterisk hardware cards

Here is a vedio about us : http://www.youtube.com/watch?v=TgDEyVE7UYc

Our best-seller MyPBX, which applies to small businesses, is an embedded hybrid IP PBX.
It supports PSTN(analog) , E1, PRI, GSM and VOIP lines.
We can also offer ODM, OEM services.
MSN: lears@yeastar.com
SKYPE: yeastar.lears
Email: lears@yeastar.cn
lears@yeastar.com

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General office

Yeastar Technology Co., Ltd
Room 202, No. 23 Wanghai Road,2nd Software Park, Xiamen, China
Xiamen
Fujian ,361006
China

Phone: +86-592-5503309 Ext
Site: http://www.yeastar.com/

Contact Person

Arthur Lears / Sales
Phone: +86-592-5503309(6032
Phone: +86-134-00719451

Hardware

E1/T1
Fax To Fax
gsm voip solutions
H.323 VoIP Gateway
H.323 Wireless/ GSM VoIP Solutions
Hosted VoIP
IP devices
Phone To Phone
Polycom
Sip Trunking
SIP VoIP Gateway
System Integration
Termination
Virtual PBX
VoipSwitch

Asterisk
Asterisk
Asterisk
SIP softphones

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SDP Protocols Are Used To Transmit Media Session Information

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.

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