Metro Ethernet

CornerStone provides cost-effective and scalable Metro Ethernet possibilities for business customers who need secure connections for mission-critical operations. Whether you need a redundant, reliable data network to connect multiple offices or you’re moving large files and need gigabit-scale connections, we have an appropriate solution for you.

CornerStone Ethernet Multipoint Service (C-EMS)

This supports connectivity between multiple offices in a metropolitan area.

Virtual Local Area Network (LAN) Ethernet connectivity at every office provides C-EMS customers with a business-class, dedicated virtual LAN. Fiber loops provide customers with the choice of 10 Mbps, 100 Mbps or 1 Gbps port speeds.

CornerStone Ethernet Virtual Private Line (C-EVPL)

• This delivers point-to-point connectivity and offers options for classes of service (CoS) and service level agreements (SLAs).
• Real-time CoS is designed to carry packet voice, video and other applications requiring tight guarantees of frame delay, frame jitter, and frame delivery performance.
• Priority Data CoS is for customer data applications requiring guarantees of frame delivery performance.

Ethernet over SONET

Where available, CornerStone offers Ethernet over SONET for point-to-point configurations. Along with the benefits of SONET transport reliability, this redundant and robust solution provides real-time CoS along with a range of bandwidth choices, including 10 Mbps, 50 Mbps, 100 Mbps, 150 Mbps, 300 Mbps, 450 Mbps, 600 Mbps and 1 Gbps. Further flexibility is available for customers requiring high-capacity circuit handoffs, including OC3, OC12, OC48 and OC192 channelized SONET 1+1 handoff.