News By Tag
News By Location
Executive Telephony, Inc. Offers Session Initiation Protocol (SIP) Dial Tone for VoIP Phone Systems
For as low as $45/month, clients will receive unlimited incoming calls (Contact Centers Excluded), 2000 outbound minutes, a phone number (More can be added) and Unlimited Trunks.
This is a perfect solution for many businesses. Not only is the cost low without any contracts, but if your business is seasonal, you can adjust to a plan to meets your needs. In high traffic season, you may need additional minutes. So for $100/month you can bump up to the five thousand minutes of outbound and also get up to five telephone numbers in this plan. Need even more minutes and numbers? No sweat. Get Fifteen Thousand minutes and fifteen numbers for only $269 month.
By the way, you can pick and choose whatever area code you want. Mix and match with numbers in Hawaii, Boston, Manhattan or Dallas. It doesn't matter what you pick, it's included in the package.
The Session Initiation Protocol (SIP) is a signaling communications protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP) networks.
The protocol defines the messages that are sent between peers which govern establishment, termination, and other essential elements of a call. SIP can be used for creating, modifying and terminating two-party (unicast) or multiparty (multicast) sessionsconsisting of one or several media streams. Other SIP applications include video conferencing, streaming multimedia distribution, instant messaging, presence information,file transfer, fax over IP and online games.
Originally designed by Henning Schulzrinne and Mark Handley in 1996, SIP has been developed and standardized in RFC 3261 under the auspices of the Internet Engineering Task Force (IETF). It is an application layer protocol designed to be independent of the underlying transport layer; it can run on Transmission Control Protocol (TCP), User Datagram Protocol (UDP), or Stream Control Transmission Protocol (SCTP). It is a text-based protocol, incorporating many elements of the Hypertext Transfer Protocol (HTTP) and the Simple Mail Transfer Protocol (SMTP).
SIP works in conjunction with several other application layer protocols that identify and carry the session media. Media identification and negotiation is achieved with the Session Description Protocol (SDP). For the transmission of media streams (voice, video) SIP typically employs the Real-time Transport Protocol (RTP), which may be secured with the Secure Real-time Transport Protocol (SRTP). For secure transmissions of SIP messages the protocol may be encrypted with Transport Layer Security (TLS).