CresTel Pakistan

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General office

CresTel
House # 94H, St # 2, Model Colony,Firdous Mkt, Gulberg 3
Lahore
Punjab ,50700
Pakistan

Phone: +92 300 942 2433

Contact Person

Naeem Akram / Tech
Phone: +92 300 942 2433

International VoIP Wholesale Provider

Termination

Cisco Systems

VoiceMaster

Active Call Center

Caspertel Inc.

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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Call Clarity

We are a high quality voip provider for global carrier grade voice services. By offering our clients the best possible IP peering combined with latest and most redundant carrier grade switching we ensure your calls are connected first time every time and