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FSP 3000 ALMAccess Line Monitoring
Network & Systems Consulting, September 2015
© 2014 ADVA Optical Networking. All rights reserved. Confidential.2
A Short Introduction…
© 2014 ADVA Optical Networking. All rights reserved. Confidential.3
Access Link Monitoring – Why?
Hello.
I am a Service Provider.
© 2014 ADVA Optical Networking. All rights reserved. Confidential.4
Access Link Monitoring – Why?
I sell services to other people.
They rely on me to get their data from Point A to Point B.
© 2014 ADVA Optical Networking. All rights reserved. Confidential.5
Access Link Monitoring – Why?
I am very good in managing their data across my core network.
PoP A PoP B
© 2014 ADVA Optical Networking. All rights reserved. Confidential.6
Access Link Monitoring – Why?
Customers can hand off their data to me in a number of ways.
They could be close. (Co-located)
PoP A PoP B
Customer X
© 2014 ADVA Optical Networking. All rights reserved. Confidential.7
Access Link Monitoring – Why?
Customers can hand off their data to me in a number of ways.
Or they could be far. (Dark fiber)
PoP A PoP B
Customer X
Customer Y
© 2014 ADVA Optical Networking. All rights reserved. Confidential.8
Access Link Monitoring – Why?
Unfortunately, dark fiber is… dark.
PoP A PoP B
Customer X
Customer Y
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Access Link Monitoring – Why?
If something happens to the access link between me and my customer, it takes time and a truck roll to determine if the fault is…
PoP A PoP B
Customer X
Customer Y
© 2014 ADVA Optical Networking. All rights reserved. Confidential.10
Access Link Monitoring – Why?
…on the fiber.
…at the customer location.
…inside my PoP.
PoP A PoP B
Customer X
Customer Y?
??
© 2014 ADVA Optical Networking. All rights reserved. Confidential.11
Access Link Monitoring – Why?
Introducing ALM?Access Line Monitoring?
PoP A PoP B
Customer X
Customer Y
?
© 2014 ADVA Optical Networking. All rights reserved. Confidential.12
Access Link Monitoring – Why?
ALM provides a very low cost method for locating faults and guaranteeing physical connectivity on the access fiber between me and my customer.
PoP A PoP B
Customer X
Customer Y
© 2014 ADVA Optical Networking. All rights reserved. Confidential.13
Access Link Monitoring – Why?
ALM is a low cost fiber monitoring device that can be passively coupled on to an access link.
PoP A PoP B
Customer X
Customer Y
© 2014 ADVA Optical Networking. All rights reserved. Confidential.14
Access Link Monitoring – Why?
ALM actively monitors the access link.
If a problem occurs, ALM can tell me where the physical path changed.
PoP A PoP B
Customer X
Customer Y
© 2014 ADVA Optical Networking. All rights reserved. Confidential.15
Access Link Monitoring – Why?
ALM actively monitors the access link.
If a problem occurs, ALM can tell me where the physical path changed.
PoP A PoP B
Customer X
Customer Y
© 2014 ADVA Optical Networking. All rights reserved. Confidential.16
Access Link Monitoring – Why?
PoP A PoP B
Customer X
Customer Y
This knowledge allows me to direct my resources quickly and efficiently.
© 2014 ADVA Optical Networking. All rights reserved. Confidential.17
Access Link Monitoring – Why?
PoP A PoP B
Customer X
Customer Y
It allows me to reduce my mean time to repair (MTTR), reduce my number of truck rolls and…
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Access Link Monitoring – Why?
PoP A PoP B
Customer X
VariousCustomers
…ALM is also good at multi-tasking. One device can monitor 16 or 256 access links.
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Access Link Monitoring – Why?
PoP A PoP B
Customer X
VariousCustomers
ALM operates independent of the underlying services. One ALM unit can manage access links loaded with Ethernet, SONET, Fiber Channel, CWDM, DWDM, CPRI, GPON,…
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What does ALM do?
…provides active monitoring of your access links.
…is non-intrusive (operates at 1650nm).
…can determine (+/- 10m) where a fault occurs.
…doesn’t care what the underlying service is.
Access Link Monitoring…
175074056
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Solution Architecture
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ALM ArchitecturePoint-to-Point configurations
ALM Implementation (SFW)
HeadEnd
Device
CO
ALM Implementation (DFW)
RemoteReflect Far
EndDevice
CPE
Coupler In/out
HeadEnd
Device
RemoteReflect
FarEnd
Device
CPE
Coupler In/out
Coupler In/out
RemoteReflectCO
Same ALM shelf is used for both SFW and DFW
© 2014 ADVA Optical Networking. All rights reserved. Confidential.23
How does ALM work?
Normal Operation
• The integrity of the access fiber is monitored by measuring the reflection of a laser at 1650nm that is co-propagated with the traffic signal(s)
Fiber-cut detection
Reflecta
nce
0x Distance
Rayleigh scattering
DemarcationReflector
• The optical power of the reflection from the CPE/Far-end demarcation is monitored
• The intensity of the reflected demarcation peak provides an estimate of the insertion loss of the link
• A fiber cut or increased insertion loss is detected as this reduces the demarcation reflection peak
• By measuring the Rayleigh Scattering power the location of the fiber-cut can be detected
Reflecta
nce
0x Distance
Rayleigh scattering Fiber-cut
1x
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ALM Wavelength Overview
1300 1400 1500 1600 1700
Pow
er
[mW
]
Wavelength [nm]
CWDMGre
y I
nte
rface
DW
DM
C-B
and
DW
DM
C-B
and
ALM
-M
onitor
ALM Monitoring does not interfere with any other transport wavelengths
© 2014 ADVA Optical Networking. All rights reserved. Confidential.25
ALM System Hardware
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• ALM Monitoring Unit
• Up to 16 Fiber Monitoring ports per unit
• Active test signal generator/receiver
• Real-Time Fiber Monitoring, Fault Detection and Localization
• Architecture allows for “Not Service Affecting” maintenance and upgrades
• ALM In/Out Passive WDM Coupler Module
• Provides connectivity to access fiber in CO/Head-end
• 16 WDM Couplers integrated into a rack mounted module
• ALM Remote Passive Reflector
• Provides CPE/Far-end Demarcation
• Integrated Reflector in a Connector
ALM System Components Summary
© 2014 ADVA Optical Networking. All rights reserved. Confidential.27
Control Options for Monitor Unit
• On the front of the Unit an RJ45 Network Connector is available
• There are two methods for northbound communication• An HTML web-interface for direct control over the ALM and review of
the status of the network
• Communication via through SNMPv3 commands (including SNMP Traps)
SNMP and HTML interface
WEB-GUIHTML interface
FSP NM or 3rd PartySNMP Server
Thank You
IMPORTANT NOTICE
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