Shared SIP trunking is when more than one office shares SIP trunking services through one account. The benefits are many, and start with the customers ability to plan for peak concurrent call utilization across the enterprise, versus on a location by location basis. Most of the time this will result in immediate cost savings, as well as a more flexible and scalable solution for the customer.

Sample Customer Requirement

Let’s say you have a customer that has 3 locations. They currently have 15 lines (POTs lines, or call paths on a PRI) at location one, 10 lines at location two, and 5 lines at location three. That’s 30 lines total today (15 + 10 + 5 = 30).

Your Solution

Provide your customer with one or many SIP trunk groups, and any number of pre-paid call paths. Also offer them the ability to “burst” up to ten (10) additional call paths on-demand for a slight surcharge.

In many cases, your customers can make due with 20% less (or more) lines if they could be shared across the enterprise. So instead of 30 lines, they may only need 24 lines (30 x .8 = 24). Not only is that an immediate cost savings, but there are call routing and business continuity benefits included with the service.


  • Burstability – ability to burst above the number of pre-paid trunks or call paths on-demand (i.e. automatically).
  • Control – make changes to the customers configuration on-demand, and as needed.
  • Advanced call routing – provide your customer with the advanced routing capabilities in COREDIAL’s cloud software platform.
  • Business continuity (Enhanced SIP trunking) – Configure a SIP trunk to automatically failover to another location, cell phones, or any number of other scenarios, without manual intervention. If your PBX hardware fails, or you lose power, your customers can still call and reach you.