Central Office Modernization

For Nortel DMS, CS 2000, 5E, EWSD, S12, AXE, and More

Service providers still operate TDM-based Central Offices to deliver telecom services to tens of millions of lines. These switches defined cutting-edge technology when they were deployed in the 1980s and 1990s but today, they represent a liability in terms of operational costs. Service providers need to transform their networks in order to transform these operational costs.

Ribbon’s Virtual C20 is the ideal solution to transition legacy networks to a modern, fully virtualized, IP core. The Virtual C20 is designed for network transformation, not simply network replacement. That’s because it can support both traditional last mile/ last kilometer infrastructure and the latest fiber/VoIP solutions, enabling a graceful migration to a low-cost, fully virtualized IP platform -- with or without last mile upgrades.  Providers can aggressively or selectively invest in transformation, based on near-term business imperatives  - all the while enhancing their network and saving money.

The Virtual C20 offers a compelling way to migrate legacy Nortel, Lucent, MetaSwitch, Alcatel, Siemens, Ericsson, etc. switches to a modern Ribbon platform that leverages the latest virtualized software architecture, is fully supported, and reduces operational costs.

C20 Call Controller Datasheet

The Time is Coming!

TDM and SONET networks are at the end of life.  The technicians are retiring, the equipment is aging, and the spares are sparse. Will your network be ready?


Reduce Real Estate Costs

A Ribbon customer that is migrating AXEs, DMSs & CS2000s calculated that their average call control footprint, per central office, excluding gateways, will decrease from about 550 sq feet to 25 sq feet (about 52 sq meters to 2.4 sq meters). Assuming $10 per sq foot, that equates to $5,250 per month or $63,000 annually in space savings per central office. It's easy to see how migrating dozens or hundreds of locations (plus gateways) can add millions to the bottom line.

Ribbon Voice Sync- One Platform

Learn How VTR Chile Migrated 700,000 Subscribers

When Losing Power is a Good Thing

Besides labor, power is typically one of a service provider’s largest variable costs. As an example, AT&T publicly reported that it consumed over 13.1 Billion kWh of power in the USA in 2020, equating to more than 1.3 billion dollars in spending (assuming a rate of $.10 per kWh).

Ribbon’s Virtual C20 uses a fraction of the power of a legacy TDM or purpose built softswitch – offering the potential for millions of dollars in power savings. Not only do these savings go directly to the bottom line, they also support providers’ green initiatives and help them providers meet stringent new local energy regulations such as Local Law 97.

Additionally, many newer servers offer the option of AC power supplies. This may eliminate the requirement/expense of supporting both AC and DC back-up power in datacenters.

Power Saving c20 Migration


Manage the Last Mile

Support multiple generations of legacy copper or migrate to fiber

While many providers have considered CLASS 5 migrations in the past, often the cost of upgrading or replacing last mile infrastructure made the business case unworkable.  The Virtual C20 changes all that, it can support a vast array of last mile options including:

  • GR 303
  • H.248
  • IP
  • NCS
  • V5.2
  • MGCP

Part of a Complete Ribbon Solution

Enabling Central Office and network-wide transformation requires more than just call control.  That why Ribbon has a complete portfolio of media gateways (trunk and access), signaling gateway, SBC, centralized policy & routing, application server, and identity assurance solutions


Ribbon Voice Sync- One Platform

People You Can Count On

Expertise Professional Service Operator Connect


Ribbon has Professional Services Teams to Assure a Successful Migration

Ribbon’s Professional Services organization has hundreds of experienced voice specialists and partners; our staff averages over 15 years of experience. It’s no surprise that individuals of this caliber have extensive technical depth, network breadth, multi-vendor expertise, and have developed specialized tools to accelerate migrations.

Ribbon has completed more than 1,000 switch collapses (with thousands and thousands of remotes) and migrated over 40 million ports, on dozens of different platforms.


The Ribbon Difference

The Ribbon Difference

Ribbon is Ready

The telecom vendor landscape has changed dramatically in recent years. Longstanding solution providers were acquired or merged and no longer focus on the service provider market. Others have exited the market in one manner or another.

Unlike our former competitors, Ribbon is investing in your future, including the effort to virtualize the C20. Ribbon is investing in Telco Cloud, including process automation and cloud-native services that deliver new deployment choices and additional cost savings. Ribbon is ready for today and what comes next.

Ribbon Difference

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