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ShoreTel IP phone systems with unified communications and contact center built in Snom One free/blue/yellow (Snom acquired and renamed pbxnsip) (SIP) Speedflow Communications VoIP class 4/5 softswitches with integrated billing, transcoding, SIP-H.323 converter.
STUN is used in some of the sip phones to enable the SIP/RTP packets to cross boundaries of two different IP networks. A packet becomes unroutable between two sip elements if one of the networks uses private IP address range and other is in public IP address range. Stun is a mechanism to enable this border traversal.
A SIP phone is an IP phone that implements client and server functions of a SIP user agent and provides the traditional call functions of a telephone, such as dial, answer, reject, call hold, and call transfer. [16] [17] SIP phones may be implemented as a hardware device or as a softphone.
3CX, Inc., is a software development company and developer of the 3CX Phone System. The 3CX Phone System is a software private branch exchange based on the SIP (Session Initiation Protocol) standard to allow calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services.
A standards-based solution for reliably delivering fax-over-IP is the T.38 protocol. The T.38 protocol is designed to compensate for the differences between traditional packet-less communications over analog lines and packet-based transmissions which are the basis for IP communications.
This is a comparison of voice over IP (VoIP) software that examines applications and systems used for conducting voice and multimedia communications across Internet Protocol (IP) networks. VoIP technology has transformed telecommunications by offering alternatives to traditional telephony systems while providing enhanced features and cost savings.
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