CM Tel (Canada) Ltd. Canada

Established in 1990, China Motion Telecom International the Group commenced its operations in Hong Kong as a supplier of a wide-range of telecommunications products and services with extensive operations in Mainland China, Hong Kong and North America. It is a listed company on both the stock exchanges of Hong Kong and Singapore.Based on its extensive operational experiences in Hong Kong and China markets established within a decade, China Motion has built up a strong customer base and brand name and this, together the newly granted MVNO status (Mobile Virtual Network Operator) in December 2001, has enabled China Motion to expand and transform its business scopes to be an innovative, high value-added telecom service provider, with business focus on mobile-related services, IDD business and distribution and retailchain.

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General office

CM Tel (Canada) Ltd.
Ste. 1108, 150 York Street
Toronto
Ontario ,M5H 3S5
Canada

Phone: +1 416-817-6888
Site: http://www.chinamotion.com

Contact Person

Mark Xu / Carrier Relation Manager
Phone: +1 416-817-6888
Phone: +1 416-817-6888

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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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