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PRI Services

ISDN PRI: A flexible solution for voice and data

Integrated Services Digital Network (ISDN) Primary Rate Interface (PRI) service from Call One provides a cost-effective solution for clear voice and high-quality data traffic. It lets you allocate network resources in a flexible way that makes the most sense for your business.

What is PRI?

ISDN PRI is a high-speed connection that uses 100% digital trunks to support your business’s need for voice, data and video. It connects your digital PBX or other digital premises equipment directly to the reliable ISDN-configured T1 facilities-based network.


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Multiple ethernet cords

PRI is an ISDN equivalent of a T1 circuit. Most business users currently use POTS (plain old telephone service) lines. ISDN PRI digitally delivers your local, long distance, Direct Inward Dial (DID) service over one 4-wire interface. Your ISDN PRI T1 has 23 channels that move voice and data along nicely at 64 Kbps. Consolidation makes sense because you reduce your network costs by incorporating ISDN PRI into your existing telecommunications blueprint, thus eliminating POTS line charges to the local exchange carrier. The D Channel is the 24th Channel. It constantly communicates with the Central Office ensuring the proper bytes and uninterrupted transmission.

Benefits of ISDN PRI:

How We Can Help

Flexibility and Cost Savings

Are you considering an ISDN PRI solution? Call One helps you determine if this service is right for your organization. Our experienced, skilled team evaluates your options and recommends the solution that’s exactly right for your needs. We make sure your service is up and running, and consolidate the billing with your other Call One services. And if you ever have an issue with your ISDN PRI service, we resolve your problem quickly.

Learn more about ISDN PRI

    • Allocate Network Resources Dynamically
      Because the amount and type of network traffic needed can vary from hour to hour, ISDN PRI allocates bandwidth where and when you need it most. You don’t have to designate certain channels for how you want to use them. For instance, outbound trunks aren’t idle while inbound trunks are nearing capacity. ISDN PRI allocates your bandwidth automatically for each transmission on a call-by-call basis. PRI phones eliminate the need for extra POTS lines as well as dedicated voice or data access lines.
    • Control Costs While Improving Quality
      By integrating voice and data services on a single PRI trunk line, ISDN PRI helps you reduce the expense of multiple lines — without sacrificing quality. Having more bandwidth at your disposal helps make it possible to communicate with more customers, make more sales and process orders more quickly.