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The goal of disaggregated optical networks is to spur price competition and facilitate optimized performance for
varied optical transport applications. Such networks are assembled using distinct optical transport subsystems,
equipped with well-defined control interfaces. Based on its Apollo optical networking product line, ECI provides
a complete set of flexible building blocks – all controllable through standard interfaces – to pursue a modular
and disaggregated approach. ECI’s Open Optical Line System (Open OLS) for high-performance transport
of 3rd-party wavelengths and spectrum mixes and matches an extensive selection of ROADMs and amplifiers
in a common chassis. The solution also provides open and programmable multiservice transponders and
muxponders, as well as control and monitoring systems for ECI and 3rd-party wavelengths and equipment.
ECI makes it easy to create a powerful and economical disaggregated multivendor optical network.
ENABLING DISAGGREGATED OPTICAL TRANSPORT
ELASTIC OPEN OPTICAL LINE SYSTEM
ECI or 3rd-party open
management system
3rd-party lambdas
and spectrum
ECI lambdas and spectrum
Standard control interfaces
Apollo
Open
OLS
Apollo
Open
OLS
3rd-party
transponders/muxponders
Apollo open
transponders/muxponders
3rd-party
transponders/muxponders
Apollo open
transponders/muxponders
3rd-party
transponders/muxponders
3rd-party
transponders/muxponders
THE EMERGENCE OF OPEN OPTICAL LINE SYSTEMS
The wave of openness that has swept over telecommunications systems in recent years has recently arrived at
the shore of optical systems. This approach allows network operators to assemble systems from best-of-breed
hardware and software modules.
Optical was one of the last places the modular openness wave reached, due to its inherent analog nature. Optical
system vendors argued, with some validity, that they could provide superior end-to-end performance via integrated
responsibility for design, implementation, and control of lightpaths. This includes signal conversion, multiplexing,
transmission, amplification, and routing, and associated monitoring, protection, and restoration.
However, this tendency is starting to change. Distinct optical subsystems are emerging with well-defined control
interfaces, allowing network operators to pursue a best-of-breed approach to building optical networks. The
primary approach is termed Open Optical Line Systems (Open OLS). Here, typically a single vendor (though
it can be multiple vendors) provides the ROADM and amplifier subsystems. These transport wavelengths from
multiple vendors of transponder and muxponder subsystems. A major goal is to increase price competition for the
trans-muxponder subsystems, which are usually the pricier parts of an optical network.
Initially, Open OLS is expected to be deployed for simple, short-haul, point-to-point applications like data
center interconnects. Then, as experience is gained, it will be used for more complex metro and long-haul optical
networking applications.
E2E network management
Optical Line System Optical Line System
Disaggregated optical network architecture
ECI is a member of the Open ROADM
Multi-Source Agreement (MSA), which
defines interoperability specifications
for Reconfigurable Optical Add/Drop
Multiplexers, transponders, and
pluggable optics. Specifications consist
of both optical interoperability and
YANG data models.
ECI’s Apollo optical networking system is exceptionally open and modular. It is ideally suited to deliver various
levels of OLS to fit different customer needs. Apollo’s Open OLS solution enables you to:
APOLLO ELASTIC OPEN OLS
• Provide a line system consisting of ROADMs
and amplifiers that transports alien (3rd-party)
wavelengths.
• Configure and manage alien wavelengths –
configuring them as virtual transponders – with
the same capabilities as Apollo wavelengths.
• Monitor alien wavelengths – using its
integrated OCM – with the same capabilities
as Apollo wavelengths.
• Extend the alien wavelength concept to an
alien spectrum. This defines a spectral band
between ingress and egress points that can
carry any wavelength combination, such as
superchannels and multi-wavelength DCI.
• Benefit from excellent lifecycle automation
and network management value for alien
wavelengths and spectrum, running over its
ROADM and amplifier line system, including
deep performance insights provided by
LightPULSE.
• Support open, industry-standard NETCONF/
YANG control interfaces, enabling control
by non-ECI management systems. ECI is a
member of the Open ROADM consortium
that is defining these interfaces for OLS
applications.
• Provide the service card (transponder and
muxponder) side of an Open OLS, with
exceptional capabilities, such as service-
specific Layer 1 encryption and continuous
modulation. ECI transponders and
muxponders are also transportable as alien
wavelengths over other vendors’ line systems.
Service
applications
Network
applications
OSS/Orchestration
RESTFUL Internet-driven APIs
NETCONF/YANG
Alien wavelengths
Alien spectrum
Integrated
OCMApollo Elastic OLS
APOLLO ELASTIC OPEN OLS PLATFORMS
The foundation for ECI’s Elastic Open OLS is the Apollo 9603 and 9608
flexible DWDM transport platforms. These can use any Apollo line card
with complete interchangeability. For data center applications, these
platforms also feature AC power and front-to-rear airflow options. Apollo
also provides separate passive shelves with slots of the same size, providing
flexibility on how to package passive elements. ROADMs and amplifiers
are two of Apollo’s main OLS line cards.
ROADMs
Apollo’s extensive ROADM offering spans from 2-degree to 20-degree
connectivity enabling a full range of ring, star, and mesh topologies. They support
CDC (colorless, directionless, contentionless) configurations, and can be applied
to both fixed 50/100 GHz grids, as well as flexible spectrum grids with granularity
of 6.25 GHz. Apollo ROADMs feature full built-in Optical Channel Monitoring
(OCM) for all output channels, including alien wavelengths, making them a
perfect fit for OLS.
Among Apollo’s many ROADM options, one module of particular interest for its OLS applications is the
ROADM_4FS. This 4-degree ROADM integrates two pluggable CFP2 MSA amplifiers (booster and/or
pre-amp) and a built-in OSC, enabling ultra-dense and efficient OLS deployments. The pluggable amplifier
capability is key, allowing customization for different applications.
AMPLIFIERS
Apollo offers a wide variety of Erbium Doped Fiber Amplifiers (EDFAs),
Raman, and Hybrid EDFA/Raman amplifiers to suit any OLS application. These
include both dynamic variable-gain and fixed-gain amplifiers. The variable-gain
EDFAs adjust automatically to the length of the fiber span for which they are
compensating. This provides optimized amplification over the entire spectral
band. By maintaining an optimal optical signal noise ratio (OSNR) at the output
of each amplifier, far longer spans and many more amplifiers can be cascaded. The result is an OSNR that is
sufficiently high for clear reception at the end of the link, requiring fewer amplifiers.
Two-stage amplifiers have the ability to provide the correct gain at each site while maintaining flat amplification
and optimal OSNR. They include mid-stage access optimized for DCF integration that does not affect the link
power budget. Fixed-gain amplifiers provide a low-cost alternative for specific configuration requirements, such as
a booster after ROADM nodes.
ALIEN WAVELENGTH MANAGEMENT AND
MONITORING
LightSOFT® is ECI’s powerful, intuitive network management system. It is used to provision, monitor, and
troubleshoot all ECI network equipment, including Apollo and the services they support. MuseTM
Orchestrator is
now supplementing LightSOFT’s functionality for automating service and network applications. All Apollo-related
functionality supported by LightSOFT and Muse can also be extended to alien wavelengths and alien spectrum
transported by Apollo, such as creation and management of lightpaths.
LightPULSETM is an especially valuable software feature for OLS applications, running in collaboration with
LightSOFT and Muse. It is a proactive, comprehensive monitoring, reporting, trending, and troubleshooting
system for optical networks. LightPULSE acts as a full-time optical network analyst, making sure that all parts of
the network are up and running in a healthy fashion. LightPULSE maintains records of all data collected, providing
context and a long-range perspective to determine whether anything might need attention and what would be the
most effective response. All of LightPULSE’s capabilities and benefits are applicable to alien wavelengths running
over an Apollo OLS.
Virtual
transponder
Native and alien
wavelengths
Encrypted
Encrypted
Unencrypted
Encrypted
Unencrypted
TRANSPONDER AND MUXPONDER SERVICE CARDS
Apollo platforms support a wide variety of Layer 1 and Layer 2 service cards, providing one of the densest systems
on the market. These can run as Apollo wavelengths over Apollo line systems or as alien wavelengths over other
vendors’ line systems.
The Layer 1 cards support multiple rates and protocol services. This reduces the number of I/O modules and
spare parts required at each site. They are designed as multi-channel cards, with pluggable transceivers, providing
a pay-as-you-grow option. The service cards also interface smoothly with alien client transceivers, providing more
customer choice.
All Layer 1 and Layer 2 cards support both B&W and colored (C/DWDM) clients. Services on these cards are
independently configurable to work with no protection or full equipment protection. The cards support GFEC,
EFEC, and no-FEC modes towards the line. Apollo service cards comply with ITU-T standards for 50 GHz, 100
GHz, and flexible-grid multichannel spacing, using fixed or tunable transceivers.
Of Apollo’s approximately 15 services cards, the TM200EN, TR200_2, and TM1200 are key for implementing
disaggregation applications.
TM200EN
The TM200EN is a 200G coherent multiservice transponder/muxponder that
supports configurable Layer 1 optical encryption. Each client service can be
encrypted selectively and independently, with its own key management. Moreover,
encrypted and non-encrypted services can be combined on the same line without
restrictions. Service providers can install the hardware for an ultra-high-speed
200Gbps network on day one, offering both encrypted and unencrypted services
to their clients. Existing clients can be upsold at any time to an encrypted service without the need to replace any
hardware, since the service can be enabled at any time via software commands.
• Multiservice
• Encrypted/unencrypted transport
• Multiplexed to 200G
• P2P or over DWDM network
Standard OTN/WDM
network
Cloud-based applications
Data center
Remote office
Unencrypted mix of services
10GE
25GE
40GE
100GE
FC8G
FC10G
FC16G
FC32G
STM-64
OC-192
OTU2
OTU2e
TR200_2
The TR200_2 200G dual transponder/muxponder card is a masterpiece of design
elegance for high-capacity metro-optical networking applications, combining
high performance, compact size, versatility, and cost-effectiveness. Its flex rate
100G/200G coherent line interfaces are uniquely provided by digital CFP2-
pluggable modules, making the TR200_2 a true pay-as-you grow service card. It
can be software-configured as a dual transponder, mapping 2 x 100GbE/OTU4
signals to 2 x OTU4, or as a dual muxponder, mapping 4 x 100GbE/OTU4 signals to 2 x OTUC2. At less than
0.25W per Gbps, the TR200_2 is also a genuine green technology.
TM1200
The TM1200 next-generation muxponder extracts every bit of bandwidth capacity
from underlying fibers. It approaches modulation in a fundamentally different
way. Rather than being engineered to support specific modulation schemes (e.g.
DPSK, QAM), TM1200 provides software-controllable ‘knobs’ for the baud rate,
modulation scheme, transmit power, and FEC overhead. This permits optimizing
the optical transmission rate (line rate) from 50G to 600G in 50G increments, for
a wide range of transport distances and fiber conditions.
Among its benefits, TM1200 optimizes your return on fiber capex investment, delaying the need to add new fiber
and optical networking infrastructure. By operating at the edge of the Shannon limit, it squeezes the maximum
capacity from each channel on a fiber. This includes both brownfield deployments with fixed 50G/100G ITU
spacing, and greenfield deployments that have a mix of fixed and flexible spectrum channel spacing.
Contact us to find out how to disaggregate your optical network
ABOUT ECI
ECI is a global provider of ELASTIC network solutions to CSPs, utilities as well as data center operators. Along with its
long-standing, industry-proven packet-optical transport, ECI offers a variety of SDN/NFV applications, end-to-end network
management, a comprehensive cyber security solution, and a range of professional services. ECI's ELASTIC solutions ensure
open, future-proof, and secure communications. With ECI, customers have the luxury of choosing a network that can be tailor-
made to their needs today – while being flexible enough to evolve with the changing needs of tomorrow. For more information,
visit us at w w w.e c i t e l e.c o m
EXPLORE THE DISAGGREGATION TREND
The trend to disaggregated optical networking systems has started and is picking up steam. ECI is responding by
taking advantage of the inherent modularity and openness of its Apollo optical networking system to package
and offer Apollo in various open configurations. This includes various combinations of ROADM and amplifier
OLS, and trans-muxponder subsystems. These open transport solutions can be managed via ECI’s value-added
network management and control systems.
Apollo subsystems are also controllable via 3rd-party management systems using standard NETCONF/YANG
interfaces, such as those defined by the Open ROADM multisource agreement consortium.
Standard
NETCONF/YANG control
interfaces
Transparent provisioning
and monitoring of alien
wavelengths
Alien spectrum
as a new service