Grandstream GXW 4104

Grandstream GXW 4104 is a VoIP gateway with 4 FXO ports, which offers small organizations, home users, remote offices and companies with distributed territorial system a high-performance solution with an excellent price/quality ratio for more efficient management of communication costs, while increasing the functionality of existing telephone systems of the organization. Grandstream GXW 4104 is a solution that can be easily integrated into the existing telephone system.

GXW 4104 was designed with an emphasis on compatibility with popular IP-PBX, Soft-switches and a lot of other different SIP-oriented devices. Grandstream GXW 4104 is developed using open standards. Grandstream GXW 4104 gateway have ultra-compact design, superb voice quality, rich functionality, highly security features and unbeatable price/performance ratio.
Technical characteristics:
4 analog FXO ports Support for H.264 codec ( up to 30 frames per second with CIF resolution) 2 RJ45 ports (can act as a bridge or a router) TFTP and HTTP SIP protocol (RFC3261) T.38 support Management and configuration through the Web RTP/RTCP/PPPoE support QoS: Diffserv, TOS, 802.1p/q Registration of up to 3 SIP servers Audio codec: G.711, G.723, G.729A/B, GSM, G.726 Security: SRTP/TLS/SIPS/HTTPS/Telnet pending Compatible with FCC, CE 12W power supply

Providers in database: 6433

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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