Sigma Systems Ltd Ghana
General office
Sigma Systems Ltd
No2 Gaby Avenue, Parakuo
Accra
G/Ag ,KD399
Ghana
Phone: +233 21 408 302
Contact Person
Wisdom Selassie / Project Manager
Phone: +233 21 408 302
Phone: +233 244 560 849
Sigma Systems Ltd
No2 Gaby Avenue, Parakuo
Accra
G/Ag ,KD399
Ghana
Phone: +233 21 408 302
Contact Person
Wisdom Selassie / Project Manager
Phone: +233 21 408 302
Phone: +233 244 560 849
- Internet Telephony Service Provider
- Voip consulting
- IP devices
- PC to Phone
- Cisco Systems
- IP Phone
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.
ClearVoip
Our rates are low, but our rates to mobile phones around the world are extremely low compared with the rates from other companies.
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