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© 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
© 2014 ADVA Optical Networking. All rights reserved. Confidential.9
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…
© 2014 ADVA Optical Networking. All rights reserved. Confidential.18
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.
© 2014 ADVA Optical Networking. All rights reserved. Confidential.19
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,…
© 2014 ADVA Optical Networking. All rights reserved. Confidential.20
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
© 2014 ADVA Optical Networking. All rights reserved. Confidential.22
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
© 2014 ADVA Optical Networking. All rights reserved. Confidential.24
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.26
• 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
info@advaoptical.com
Thank You
IMPORTANT NOTICE
The content of this presentation is strictly confidential. ADVA Optical Networking is the exclusive owner or licensee of the content, material, and information in this presentation. Any reproduction, publication or reprint, in whole or in part, is strictly prohibited.
The information in this presentation may not be accurate, complete or up to date, and is provided without warranties or representations of any kind, either express or implied. ADVA Optical Networking shall not be responsible for and disclaims any liability for any loss or damages, including without limitation, direct, indirect, incidental, consequential and special damages, alleged to have been caused by or in connection with using and/or relying on the information contained in this presentation.
Copyright © for the entire content of this presentation: ADVA Optical Networking.
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