Evolutionary Migration to Next-Generation
Packet Networks & Services
Moving Forward – The Smart Way Many carriers and service providers are introducing IP/Ethernet-based services to meet market demand, increase competitiveness and establish new revenue opportunities. However, the transition of their networks to packet technologies to lower costs and support the new high-bandwidth services may be implemented at a varying schedule, due to operational and budgetary constraints. As a result, there remains an enormous installed base of devices that use TDM or low speed data connections, which depend on PDH and SDH/
SONET transport. This creates a special challenge for network operators, who maintain extensive legacy TDM infrastructure and need to economically manage a myriad of interfaces, protocols, topologies, and media. For more than 30 years, RAD has been working closely with service providers worldwide to address their need for flexibility, cost efficiency and carrier-class reliability when migrating to next-generation networks and services.
Profitable Migration Is a Balancing Act When it comes to transitioning their footprint and service offering to packet-based technologies, service providers typically adopt one of three strategies:
? ? ! Forklift upgrades to Ethernet/IP/MPLS and switch to new services
•• Can I justify the ROI model?
•• Will legacy services shutdown hurt my ARPU?
Hold off change for as long as possible
•• Am I missing a revenue boost to my declining ARPU? •• Can I justify the costly maintenance; overcome equipment obsolescence?
A balanced migration
•• All I have to do is decide on the pace and extent of transition!
A phased migration process depends on various factors. Service providers need to balance the pace and extent in which the transition is executed to ensure it helps maximize their revenues and lower their TCO:
What drives Service Providers’ move to NG services & networks: •• Additional revenue streams from new IP/Ethernet services
Migration barriers: •• Migration complexity
•• Customer demand for high bandwidth, Ethernet/IP solutions
•• Not all legacy services can be replaced with new alternatives
•• Diminishing expertise in legacy equipment
•• Not all existing infrastructure can be shut down
•• End Of Life/End Of Service vendor notifications
•• Mission-critical customer apps for strategic accounts
•• Convergence to a common packet-switched infrastructure
•• Regulatory restrictions for critical services
Alternative Paths for a Phased Migration
Hybrid When Access to Use:
How to Provide Assured
TDM & Ethernet
•• TDM aggregation and CPE equipment becomes obsolete
Services?
•• Services require Ethernet/IP & SDH/SONET co-existence •• ROI targets mandate futureproof investments •• TDM services can’t be retired due to customer demand
Ethernet over PDH/SDH/SONET
Your Advantages with RAD’s One-Stop-Shop for Cross-Generation Solutions: •• Versatile product portfolio with hybrid (TDM+PSN) CPEs, aggregators and SFP devices for any First Mile
When
to Use:
•• TDM/SDH/SONET network remains in place while introducing new services •• Limited service coverage of PSN metro
•• Scalable high access rates are required to meet diverse customer needs
•• Postpone upfront investments in packet infrastructure with incremental CapEx in future-proof devices •• Improve utilization of network capacity/ rented infrastructure resources with service aggregation •• Eliminate future investments in Service Assured Access with forward-compatible devices •• Reduce customer churn by maintaining legacy services •• Shorten TTM for basic and advanced Carrier Ethernet service packages even before PSN is in place
TDM Services
over PSN
When
to Use: •• Provide standard TDM services over PSN without effecting customer experience •• Use available DSL and fiber First Mile
RAD: Ethernet & TDM
over PSN
L eads in Carrier Ethernet Access Solutions Leads in TDM Emulation Solutions rovides Long-Term Product Support P Designed for All Migration Scenarios
Migration Path 1:
Hybrid Access Business Customer Site PBX E1/T1
Router ETH
ETX/ASMi/ Optimux
Central Office
STM-1/ OC-3
Megaplex
STM-4/ OC-12
SDH/ SONET
STM-1/ OC-3
Central Office
STM-4/ OC-12
Megaplex
Business Customer Site PBX
SHDSL/ FO
SHDSL/ FO
E1/T1/ ETH
E1/T1/ ETH
GbE
ETX/ASMi/ Optimux
E1/T1
Router ETH
GbE
PSN
•• Set the pace in which you introduce new networks and services, or decommission legacy footprint by using the same CPEs and aggregation devices throughout the migration process •• No forced upgrade investments due to End Of Life decisions made by vendors
increase efficiency; divert Ethernet traffic to new PSN when need arises •• Service Assured Access solution enables Metro Ethernet Forum’s Carrier Ethernet 2.0 services •• Ensure service continuity for legacy TDM applications and equipment even after SDH/SONET networks are replaced, using TDM pseudowire
•• Deliver legacy applications alongside new offerings using the same access link to reduce costs and
Migration Path 2:
Ethernet over PDH/SDH/SONET PSN
ETH over PDH Aggregator
Egate
Branch/HQ ETX/RIC FE
E1/T1 E3/T3 n x E1/T1 Bonding
Branches ETX/RIC FE ETH over PDH
SDH/ SONET
ETH over PDH
E1/T1 E3/T3 STM-1/OC-3
MiRIC
FE
ETH over PDH SFP
•• Enable carrier-grade MEF-certified (EVPL, EPL) service delivery with advanced monitoring and SLA assurance over available PDH microwave, SDH/SONET access rings or leased SDH/SONET wholesale service
•• Allow better service reach and faster TTM when PSN metro coverage is limited, or fiber trenching is not feasible •• Meet diverse customer needs with scalable high access rates via bonding
Migration Path 3:
TDM Services over Packet SDH/ SONET
n x STM-1/ OC-3
Aggregation PoP IPmux/ETX
Business Customers’ Branches RADview
PBX
Router MiTOP
GbE/ 10 GbE
PSN IPmux/ETX
Customer/HQ
n x E1/T1
PSN IP/ETH/MPLS
PBX n x E1 IPmux/ETX Router ETH
PBX IP DSLAM MSAN SHDSL.bis (EFM)
E1 Router
ETX/LA V.35/X.21 ETH
•• Maintain E1 PRI, TDM leased line, or 2G backhaul services over GPON, MSAN and packet deployments •• Pseudowire emulation CPEs, aggregation devices and smart SFPs support standard analog, serial, E1/T1, and SDH/SONET services without affecting customer experience
•• Flexibility in PWE termination options: Customer site-to-customer site; customer site-to-PoP/network, PoP-to-PoP •• RAD is the market leader in TDM pseudowire technology with more than 200,000 circuits deployed worldwide
The End Goal: Service Assured Access Profitable Carrier Ethernet Services. Fast Deployments. Easy Operations. Whichever path you choose to pursue, RAD’s migration solutions have built-in Service Assured Access (SAA)
capabilities for a flexible, cost-efficient and easy to run packet network and Carrier Ethernet 2.0 services.
For more information on RAD’s Service Assured Access solution, see the brochure or visit www.rad.com
www.rad.com
Specifications are subject to change without prior notification. The RAD name and logo are registered trademarks of RAD Data Communications Ltd. RAD product names are trademarks of RAD Data Communications Ltd. Š2013 RAD Data Communications. All rights reserved. Catalog number 802594, Version 05/13