Nulltel Latvia
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Voip Termination ISP
- H.323 VoIP Gateway
- PC to Phone
- Phone To PC
- Phone To Phone
- SIP VoIP Gateway
- Termination
- Web Call
- Web To Phone
- Cisco Systems
- Custom Open Source Billing Solution
- IP Phone
Session Initiation Protocol (SIP) is a text-based standard put in place by the Internet Engineering Task Force (IETF) and is the primary protocol for Voice over Internet Protocol services. SIP is similar to a MGCP in that it's a signaling protocol that can create, maintain and terminate sessions in IP-based networks. These sessions include multimedia conferencing and two-way phone calls. SIP protocol can run on User Datagram Protocol (UDP), Stream Control Transmission Protocol (SCTP) and Transmission Control Protocol (TCP) because it was created to function independently from the underlying Transport Layer as an Application Layer.
3U Telecom Inc.
3U TELECOM is the subsidiary of 3U TELECOM AG, a long distance provider founded in Germany in 1997 with the dream to offer the lowest priced but highest quality long distance service to residential customers and small businesses.Offering low rates was mad
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