What is CSRP?

CSRP is a high-performance SIP call routing platform for VoIP (Voice over IP) service providers of all kinds.

It is often described as a "Class 4" platform because it is used on the back side of a VoIP service provider to connect customer-facing infrastructure to the rest of the telephone network.

What does it do?

At the core, it's a router for VoIP calls set up over SIP. It can select quickly from billions of routes (although most users won't have that many) and apply changes, policies, filters and options along the way.

Most of the time, it's used to connect customer gateways to PSTN connectivity providers so that they can make and receive calls to and from the rest of the world.

It also generates billing records and prices calls so that customers can be charged and supply-side costs tracked.

Who uses it?

Customers with clear business cases for CSRP have included:

Hosted PBX providers, retail and wholesale SIP trunking companies, international call traffic aggregators and resellers, calling card companies, call centres, and specialty voice application companies (e.g. hosted IVR, appointment reminders, etc).

Stop losses. Improve gross margins and cash flow.

CSRP optimises your PSTN termination cost structure with high-speed Least Cost Routing (LCR). Prepaid credit limits how much your customers can spend, profit margin enforcement prevents customers from cherry-picking expensive destinations from your blended rate plan, and concurrent high-cost call thresholds detect and rectify toll fraud from compromised endpoints.

Consolidate systems. Do more with less.

CSRP is one infrastructure for all of your carrier traffic and through which your customers make and receive PSTN calls. It provides management tools for flexible, redundant inbound and outbound carrier routing, and it solves the technical challenges of interfacing with a variety of customer and vendor equipment across public and private networks, including robust far-end NAT traversal support and media relay.

CSRP was engineered from the ground up with high throughput in mind, allowing you to process thousands of call setups per second, run millions of concurrent calls1 and route among billions of prefixes on one server. It delivers the highest port density and best unit economics for your physical or virtualised infrastructure investment. With CSRP, you can eliminate unnecessary media gateways, SBCs and route servers from your data centre and get back to business.

1 Without RTP anchoring. One CSRP RTP server can support about 12,000 - 15,000 concurrent calls, depending on hardware.

Quality vendor support. A dependable partner.

We know you're not just buying software; you're buying a vendor relationship from which you expect high service value and reliability. Our customers leverage our deep expertise in telecom, VoIP and SIP, and benefit from our extensive operational support and commitment to resolving problems quickly and effectively.