Session Initiation Protocol (SIP)


Voice and data on a single IP connection to optimize bandwidth and budget

SIP - Session Initiation Protocol

Reduce costs and simplify IT management by combining voice and Internet access over a single connection using your existing IP PBX system. Purchase only the trunks you need based on the maximum number of concurrent calls your business requires.


SIP is a very flexible protocol that has great depth. It was designed to be a general-purpose way to set up real-time multimedia sessions between groups of participants. In addition to simple telephone calls, SIP can also be used to set up video and audio multicast meetings, or instant messaging conferences.


 SIP allows for optimization of network capacity, adds flexibility to your existing PBX or key system investments, and provides the foundation for adding advanced services as your business needs.


StrataCore can help bring clarity to this complex marketplace to ensure you secure the best voice solution to meet your specific requirements and business needs. 

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A few of the features of SIP Trunking:


No more BRIs, PRIs or PSTN gateways - SIP trunking eliminates the need to purchase BRIs (Basic Rate Interfaces), PRIs (Primary Rate Interfaces), or local PSTN gateways, lowering telephony costs.


No more separate voice and data connections - SIP trunking also reduces costs by eliminating the need for separate voice and data connections, and expands the potential for communications convergence using both voice and data together.

Turn all calls into local calls - the emergence of service providers offering SIP trunks to enterprises means that enterprises can outsource their PSTN connectivity to a third party. This reduces long-distance charges, as SIP calls travel over the Internet or provider’s IP network to a termination point owned by a service provider, where the call is then transferred to the local PSTN.

Get rid of costly 800 numbers, but not the convenience - instead of providing customers with an “800 number,” a SIP trunking service provider with points of presence in multiple U.S. cities could establish local numbers in each city for customers to call. Those calls can be terminated locally and placed on the Internet for delivery to the company’s call center.

Let ENUM help - ENUM (Telephone Number Mapping) is used to automatically look up phone numbers to determine if they match a known SIP address, allowing the call to be completed over the Internet (instead of transferring it out to the PSTN). Since no traffic is placed on the PSTN, ENUM provides an additional means of cost-savings for businesses that communicate with other firms that use SIP for communications.

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