Ribbon offers the "gold standard" for centralized network policy and routing control.  No competitor even close to the breadth and depth of the Ribbon solution.

With an extremely scalable, highly reliable, distributed architecture, Ribbon’s Policy and Routing Server (PSX) enables service providers to intelligently manage (e.g., best routing paths, priority, admission control, etc.), millions of communications sessions  per hour. Supporting 25 distinct routing models, a service provider can optimize the routing of every call and the allocation of associated network resources to deliver dynamic session management.

A single point of provisioning, coupled with a distributed model for policy and routing decisions, makes it possible to greatly reduces the complexity and cost of providing optimal session management across an entire network.

PSX can be deployed in any fixed or mobile operator’s network, including in an IMS framework. Implemented as a software-only solution, deployment options exist for multiple virtual and cloud environments in both private and public clouds.

Flexibility and extensibility for policy and routing decisions was a paramount design aspect of PSX.  With support for over 2 dozen protocols, it is possible to support many different networks, with a single solution, enabling many valuable functions and services, such as:

  • Overload Controls
  • Blocking and Screening
  • Digit and Parameter Manipulation
  • Call Validation and Treatment
  • Number Translations
  • Number Portability
  • Business Voice Services
  • IMS Border Gateway Control Function (BGCF)

Call Trust® Identity Assurance Services

Policy and Routing for Identity Assurance

PSX is an integral component of Ribbon’s Call Trust solution that provides Identity Assurance services:

  • STIR/SHAKEN
  • Reputation Scoring Service

PSX is an enabler for our service provider customer’s implementation of STIR/SHAKEN, interworking with Ribbon’s SBCs and Gateways and with any vendor's STIR/SHAKEN-defined Secure Telephone Identity to handle caller authentication or verification request queries and responses.

PSX can also acts as a “broker” in real-time, for every call, handling caller identity and call reputation queries and responses for Ribbon’s cloud-hosted STIR/SHAKEN as a Service and its Reputation Scoring Service

Learn More About QoS Routing

Least Cost & QoS Routing and Number Translation Services

PSX SWe delivers an enhanced Least Cost Routing (LCR) application enabling service providers to reduce costs and increase quality of service by selecting the most appropriate SIP session routes based on a variety of criteria including interconnect carrier rates, service level agreements, voice quality, latency and network capacity. Because of the complexity of LCR calculations and the number of variables involved, this decision-making process has traditionally employed teams of analysts or been addressed by LCR engines. Instead, Ribbon’s LCR application is offered as a highly scalable and flexible solution that works seamlessly with Ribbon, or 3rd party SBCs. The LCR application aggregates pricing and customer information from back-office systems and combines it with near real-time SIP session metrics provided by Ribbon network analytics software to optimize policy decisions.

If you want to find the shortest path between two points, simply draw a straight line. If, however, you want to find the path with the lowest cost AND the best quality of service (QoS), it can be anything but simple and straightforward. By combining PSX SWe and Ribbon Analytics, we can offer QoS Routing making it possible to find the best combination of cost and quality when determining a routing path. With the QoS routing application a service provider gains a competitive advantage to be the first choice for routing SIP interconnect and access trunk traffic.

When network operators support number portability services it costs them a very small fee to “dip” into a third-party number portability database for an address. Although the fee may only be a fraction of a penny for every dip, if you handle millions of calls these number translation fees add up fast. Fortunately, with the PSX SWe there a better way - host your own number translation server. The PSX SWe number translation application enables carriers to deploy a number portability server in-house, reducing costs and decreasing per-call latency incurred from external 3rd party database dips. Like LCR, it is a highly scalable, highly flexible solution. The number translation application supports interoperability with multiple databases using SIP, ENUM, INAP, and TCAP allowing service providers to get number portability data directly from the source.

Least Cost & QoS

Toll-Free Routing Service Solution Brief

Toll-Free Routing Service

For over 50 years, toll free numbers have been exceptionally successful.  Toll free numbers enable businesses and institutions to support branding initiatives, facilitate marketing campaigns, promote a national presence, and to simply make it convenient for people to reach them without regard for cost.

Unfortunately, arbitrage and fraud schemes such as toll free traffic pumping, are increasingly undermining the integrity of the intercarrier compensation model for toll free calls.  To address this issue, the Federal Communications Commission, took definitive steps to reduce intercarrier compensation charges that provide the underlying incentive for toll free routing arbitrage and fraud schemes.

Specifically, the FCC ruled the following:

  • Cap all originating 8YY end office, tandem switching and transport, and database query charges at their current rates as of October 9, 2020
  • Reduce originating 8YY end office access charges by moving to a bill-and keep model over three years beginning July 1, 2021 and ending July 1, 2023
  • Adopt the combination of 8YY originating transport and originating tandem switching access charges into a single nationwide tandem switched transport access charge capped at $0.001 per minute
  • Reduce 8YY database query charges, needed to route all 8YY calls, to a cap of $0.0002 per query in three steps ending July 1, 2023
  • Prohibit carriers from double dipping by charging for more than one such database query per call.

On the upside, the incentives for arbitrage that unnecessarily raised costs are now reduced.  Similarly the incentive that encouraged bad actors to generate high-volume robocalls for toll free traffic pumping is greatly reduced. And maybe most importantly, these are critical steps to protect 8YY customers who have been unnecessarily burdened by high costs and fraudulent 8YY calls that they had to pay for.

On the downside, for carriers, the impact of this ruling is a significant shift of the burden to support 8YY calls.  The old pricing model created an incentive for originating operators to leave TDM transport, tandem switching, and even extra route miles in the call path.  The new model reflects the modern reality of tandem-less networks and efficient IP transport.  All carriers involved in handling 8YY calls are now caught in squeeze of having to cover their own costs under the bill-and-keep model as well as having limits on how much they can recoup for handling 8YY calls.  Carriers need new methods to restore profitability.

The two most significant ways to reduce costs, thus preserving margins on handling toll free calls, is for the originating carrier to:

  • Have the most cost-effective way to identify the responsible organization (RespOrg) for the termination of each toll free call.
  • Where possible, to utilize directly routing to RespOrg for the toll free call termination to maximize inter-carrier compensation

Ribbon’s Toll-Free Routing service delivers these capabilities.

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