LoopStar® 700 Ethernet and TDM Services Over Fiber to Multiple Customers and Locations

With a cost-effective LoopStar 700 at the main point of presence PoP, one standard network can carry a full range of traditional services, such as PBX tie lines, Frame Relay private line

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Overview

Metro area telecommunications providers need to deliver a mix of inherently incompatible services

to enterprise customers, who expect compatibility and consistency across all their locations

Under pressure to provide bundled services at lowest possible costs, with fast response to service requests, service providers need to reach all of their customer locations in the most cost-effective way They need to evaluate the cost of running separate circuits to each location to support disparate services, and have to consider the bottom-line justification for extending services into areas where only one prospect may be lined up Service providers also need to determine whether equipment costs can be justified if that first sale doesn’t lead to more business from that location Historically, service providers have had three sub-optimal responses to these challenges:

• Run redundant network links (owned or leased circuits) to customer locations to provide the mix

of packet and TDM (time division multiplex) services they require

• Use “dumb” gateway devices to aggregate services for transport, but sacrifice the ability

to monitor performance all the way to the network edge and deliver on service level

agreements (SLAs)

• Deploy high-powered SONET add-drop multiplexers (ADMs) or Layer 2 packet switches to build out the metro network, but only for service areas that cost-justify the expenditure

The first option is cumbersome and costly The second approach is inexpensive, but inadäquate

to meet customer expectations for network performance The third strategy is suitable for high-density serving areas, but doesn’t address new markets or small branch locations of the best enterprise customers

Other options include traditional time division multiplex (TDM) services, such as voice trunks from private branch exchange (PBX) systems and leased-line data services, which still represent substantial revenue Providers need to determine the best way to win business from customers who want Ethernet and TDM services from a single provider

Challenges include serving a high-rise building or campus and reaching customers beyond the 100-meter limit of Ethernet connections, or when the provider is restricted to fiber risers What if there

is an opportunity to extend service to a nearby customer, but the revenue potential doesn’t cost-justify extending the metro SONET/SDH or packet ring to that location?

® 700

The LoopStar 700 product suite is ideally suited for all of these situations This multi-service access solution delivers flexible, business-class TDM and Ethernet-based services over packet backbones With

a cost-effective LoopStar 700 at the main point of presence (PoP), one standard network can carry a full range of traditional services, such as PBX tie lines, Frame Relay private lines and video teleconferencing alongside Ethernet LAN traffic

This carrier-class edge platform uses a compact, flexible architecture, enabling service providers to deliver

a full array of services at lower costs, while positioning the network for an intelligent evolution to next-generation networks Multi-service traffic can be transported efficiently across a single network, rather than using expensive overlay schemes

One or more LoopStar 700s can subtend off another LoopStar 700 through a fiber or copper riser

to extend multi-service capabilities to all floors in a high-rise building or all buildings in a campus or business park This subtending configuration, coupled with a modular interface architecture, makes

it economical to extend services to small serving areas – and gain early-mover advantage to promote additional services Hub-and-spoke, ring extension, and combinations of those topologies are supported

Customer A

PBX Switch/Router

Metro Network (over SONET/SDH

or Optical Ethernet)

Switch/Router

TDM Ethernet

PBX Switch/Router

TDM Ethernet PBX

LS 700

LS 700

LS 700

Extend Carrier-Class TDM and Ethernet Services Throughout Multi-tenant Locations

The LoopStar 700 system is optimized for metropolitan area networks serving single enterprise

customers, multi-tenant units, and campus environments This versatile platform is ideally suited for several key applications:

• Leverage metro SONET/SDH networks to carry Ethernet services, aggregating packet and TDM traffic onto a single uplink into an ADM

• Drive metro packet networks to carry traditional TDM services, using a robust and patented circuit emulation technique that converts TDM traffic into packets for transport, and compensates for the disparities between TDM and packet networks

• Extend the reach of Ethernet and TDM services to all floors of a high-rise building or to all buildings

in a campus or business park environment through fiber-attached sub-networks

In this third scenario, a LoopStar 700 can be attached to an existing ADM or Ethernet node within a building’s PoP Multiple LoopStar 700s can then be subtended off this LoopStar 700 via direct fiber Whether the metro network is based on SONET/SDH, NextGen SONET, Resilient Packet Ring (RPR) or Optical Ethernet technologies, the LoopStar 700 product family offers a compelling choice for expanding the reach of services

A cost-effective LoopStar 700 system deployed today has a payback period of only 12 months or less – even if only one customer is signed up Once deployed, this versatile edge device offers a compelling solution for bundled services to customers of all sizes

® 700

Features and Benefits

The LoopStar 700 product family was designed

from the ground-up to support multiple services

at the carrier edge and customer premises,

offering several important advantages for this

service-extension solution:

Lower cost of entry With the LoopStar 700

solution, carriers can extend high-demand

Ethernet and TDM services to new locations

without the high costs associated with building

out the metro network Whether using multiple

T1/E1s bonded together or point-to-point fiber

runs, cost justifications can be made on an

individual case basis to effectively light a new

building Since this solution carries a lower cost

than extending the metro ring, it is much easier

for a carrier to cost-justify – both as an early

entry solution into a new market as well as a

permanent, cost-effective alternative to extending

the entire fiber ring

Simplified network architectures The LoopStar

700 dramatically reduces the cost and complexity

of extending services throughout multi-tenant

units and campus environments For example,

instead of terminating separate access circuits for

each tenant, TDM and Ethernet services can be

consolidated onto a single link Since all traffic is

packetized, there is no need to aggregate circuit

and packet traffic separately in the transport

network or back in the central office

Support for multiple customers with a single

platform There’s no need to deploy a separate

LoopStar 700 platform for each customer in a

multi-tenant building or campus environment

Virtual LAN (VLAN) tagging of traffic entering

the LoopStar 700 unit, based on IEEE 802.1Q

standards, segregates traffic from multiple

customers for security, traffic management,

and differenti¬ated treatment at seven different

priority levels Rate limiting at 1Mbps increments,

on a per-port or per-VLAN basis, allows

the carrier to carefully define how bandwidth is

allocated on that shared platform

In the campus or high-rise POP, a single LoopStar

700 platform can aggregate traffic from multiple

subtending LoopStar 700 units Other solutions

require a hub counterpart for every edge device in

the field

New service opportunity from existing networks Where the backbone is a SONET/ SDH network, the LoopStar 700 can transport Ethernet services over that infrastructure Where the backbone is

a packet network, and existing Layer 2 switches already bring Ethernet LAN traffic onto the network, a LoopStar 700 can add TDM traffic

to the mix without requiring an expensive and cumbersome overlay network In either case, the result is increased revenues, better customer retention and expanded service opportunities

Flexible interfaces The LoopStar 750 and

LoopStar 720 can provide uplinks of NxT1/E1, DS3, OC-3c/STM1, OC-12c/STM4, 100Base-FX Ethernet and Gigabit Ethernet On the subscriber side, copper and fiber Ethernet interfaces are supported, as well as T1/E1s

Any combination of Ethernet and TDM bandwidth can be supported, up to the payload rate of the uplink For example, a DS3 can be provisioned

to carry a few T1s for PBX or videoconferencing traffic, and the rest of the bandwidth can be used for Ethernet services, allocated in 1 Mbps increments When more bandwidth is required, the con¬nection can be increased as needed without physically changing the interface

Streamlined management and provisioning

Because a single, universal platform supports packet and TDM services – both in the PoP and throughout in-building and campus networks – carriers no longer have to manage multiple customer-premise devices from different vendors LoopStar 700 products support a single point of provisioning and management, eliminating the need to make expensive changes on many metro devices within the network

Visibility to the customer premises The

LoopStar 700 platform provides management visibility out to the customer-premise equipment without requiring a separate (out-of-band) overlay management network Because all equipment

is owned by the carrier, multiple points of demarcation can be established and dynamically tailored as real time situations require, greatly simplifying fault isolation and troubleshooting of network conditions

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Extending the reach of revenue services.

In a competitive arena, service providers cannot afford to build out the metro network unless return on investment is assured Yet this cautious approach could cost the carrier over the longer term in missed opportunities

The LoopStar 700 solution makes the business case for multi-tenant markets more compelling than ever This cost effective platform reaps revenue from TDM services while optimizing the network for burgeoning packet services One universal solution supports on-demand access to a complete array of services – new and existing – across a unified, easy-to-manage infrastructure

Providers can start with a low-cost entry, than scale easily in services and bandwidth whenever the business case warrants These benefits can be extended throughout in-building or campus networks – fiber or copper risers – without costly build-out of the metro network

Why the LoopStar 700?

The LoopStar 700 platform features a compact, flexible architecture that enables service providers to deliver a full array of services at lower costs, while positioning the network for an intelligent evolution to next-generation networks

This versatile platform is excellent for several key applications, including leveraging metro SONET/SDH networks to carry Ethernet services, providing metro packet networks to carry traditional ADM services, and extending the reach of Ethernet and TDM services through fiber-attached sub-networks