Epic Systems China
General office
Epic Systems
beijingjingchaoyang
beijing
brijing ,100029
China
Phone: 86-010-58773390
Phone: 86-010-58772550
Site: http://www.dalutong.com
Contact Person
rebecca li / salea manager
Phone: 86-010-58773390
Phone: 13681111142
Epic Systems
beijingjingchaoyang
beijing
brijing ,100029
China
Phone: 86-010-58773390
Phone: 86-010-58772550
Site: http://www.dalutong.com
Contact Person
rebecca li / salea manager
Phone: 86-010-58773390
Phone: 13681111142
- Hardware
- IP devices
- Termination
- Audiocodes
- 2N
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.
Universal Phone Systems, Inc.
Our mission is to provide the world with quality service, the best alternatives of communication, at a regional, national or international level, "THE OPTION FOR COMMUNICATIONS".Universal Phone Systems, Inc., was founded with the goal to implement differe
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