. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
About.this.Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unpacking.and.Inspection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Power.Loss.Bypass. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Connecting.to.the.Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Connecting.to.the.In-line.Security.Device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Limitations.on.Warranty.and.Liability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Optical Bypass Switch
PLEASE READ THESE LEGAL NOTICES CAREFULLY.
By.using.a.Net.Optics.Optical.Bypass.Switch.you.agree.to.the.terms.and.conditions.of.usage.set.forth.
by.Net.Optics,.Inc ..
.No.licenses,.express.or.implied,.are.granted.with.respect.to.any.of.the.technology.described.in.this.
manual ..Net.Optics.retains.all.intellectual.property.rights.associated.with.the.technology.described.in.
this.manual ..This.manual.is.intended.to.assist.with.installing.Net.Optics.products.into.your.network .
Trademarks and Copyrights
©.2007.by.Net.Optics,.Inc ...Net.Optics®.is.a.registered.trademark.of.Net.Optics,.Inc ..Additional.
company.and.product.names.may.be.trademarks.or.registered.trademarks.of.the.individual.companies.
and.are.respectfully.acknowledged .
Additional Information
Net Optics, Inc. reserves the right to make changes in specifications and other information contained
in.this.document.without.prior.notice ..Every.effort.has.been.made.to.ensure.that.the.information.in.
this.document.is.accurate . 1
Optical Bypass Switch
Introduction
Net.Optics.Optical.Bypass.Switches.provide.a.permanent.and.trouble-free.
access.port.for.in-line.network.security.and.monitoring.devices ..The.Optical.
Bypass Switch automatically switches network traffic through added in-line
devices.or.bypasses.devices.that.are.about.to.be.removed ..Prevent.link.failure.
when.attached.IPS.and.IDS.devices.lose.power.by.powering.the.Bypass.
Switch.and.in-line.device.from.the.same.power.source ..
Uninterrupted traffic
The Optical Bypass Switch supports fail-open monitoring with any fiber
in-line.device.when.it.shares.the.same.power.source.as.the.in-line.appliance ..
While the Optical Bypass Switch is receiving power, it diverts network traffic
to attached in-line devices. In this state, all in-line traffic is routed directly to
the.device.connected.to.the.Optical.Bypass.Switch ..
When the Optical Bypass Switch loses power, in-line traffic continues to
flow through the network link, but is no longer routed through the device.
This.allows.the.network.devices.to.be.removed.and.replaced.without.network.
downtime ..Once.power.is.restored.to.the.Optical.Bypass.Switch,.network.traf-
fic is seamlessly diverted to the in-line device, allowing it to resume its critical
functions .
Simply Plug It In
Each.Bypass.Switch.includes.all.the.cables.and.power.supplies.you.need.to.
quickly.connect.to.an.IPS ..Three.quick.steps.is.all.it.takes.to..establish.a.secure.
connection.point.for.inline.devices . 
Optical Bypass Switch
Key Features
Passive, Secure Technology
Fail-open monitoring with any GigaBit fiber in-line appliance at speeds of
1000.Mbps
Increased.reliability.on.critical.network.links
High-speed.optical.switching.with.minimal.insertion.loss
Fully.RoHS.compliant
Ease of Use
LED.indicator.shows.power.status
Front-mounted.connectors.support.easy.installation.and.operation
Cables.included.for.plug-and-play.deployment
Silk-screened.application.diagram.illustrates.all.connections.for.easy..
deployment
Optional.19-inch.rack.frames.holds.two.Bypass.Switches
Tested.and.compatible.with.all.major.manufacturers.monitoring.devices,.
including.protocol.analyzers,.probes,.and.intrusion.detection/prevention.
systems
Support
Net.Optics.offers.free.technical.support.throughout.the.lifetime.of.your.
purchase. Our technical support team is available from 8 am to 5 pm Pacific
Time,.Monday.through.Friday.at.+1.(408).737-7777.and.via.email.at.ts-
support@netoptics .com ..FAQs.are.also.available.on.Net.Optics.website.at.
www .netoptics .com .









Optical Bypass Switch
Product Diagrams
Figure 1.
BPO-SX and BPO-LX models with DC Jack
Network A
Network B
Monitor A
Monitor B
Silk Screen Diagram
B
B
A
A
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
®
®
Power Connector
Figure 2.
BPO-SX-1 and BPO-LX-1 models with RJ45 port
Network A
Network B
Monitor A
Monitor B
Silk Screen Diagram
B
B
A
A
Rx
Tx
Rx
Tx
Rx
Tx
Rx
Tx
®
®
Control
Control Port 
Optical Bypass Switch
About this Guide
This.guide.covers.the.installation.and.use.of.the.following.models:
Part Number
Description
BPO-SX
Optical Bypass Switch, Multimode
BPO-LX
Optical Bypass Switch, Singlemode
BPO-SX-1
Optical Bypass Switch, Multimode w/RJ5
BPO-LX-1
Optical Bypass Switch, Singlemode w/RJ5
Unpacking and Inspection
Unpack.the.Optical.Bypass.Switch,.power.supply,.and.cables.provided ..Each.
Optical.Bypass.Switch.is.delivered.with.the.following:
1.Control.cable.(BPO-SX-1,.BPO-LX-1.models)..
or.
1.DC.power.supply.(BPO-SX,.BPO-LX.models)
2 Duplex SC fiber cables
1.Manual.
If.any.component.is.missing.or.damaged,.contact.Net.Optics.Customer..
Service.immediately .

5
Optical Bypass Switch
Power Loss Bypass
The.Optical.Bypass.Switch.protects.link.integrity.when.the.in-line.appliance.
loses.power ..When.the.Bypass.Switch.is.receiving.power.it.is.in.Bypass.Dis-
abled (OFF) mode. In Bypass Disabled mode the switch sends network traffic
through.the.connected.device .
Figure 3.
Disabled Mode
When.power.to.switch.fails,.it.enters.Bypass.Enabled.(ON).mode.and.network.
traffic bypasses the connected device until power to the switch is restored.
Figure 4.
Enabled Mode
Bypass Disabled Mode
Firewall
Firewall
Router
Switch
Intrusion
Prevention System
Internet
1
Bypass Switch
®
A
B
B
www.netoptics.com
A
When the Bypass Switch is in Bypass Disabled mode,
all in-line traffic is routed through the monitoring device.
The Bypass switch is receiving
power for the DC power supply
or RJ45 control port.
2
Bypass Enabled Mode
Firewall
Firewall
Router
Switch
Internet
1
Bypass Switch
®
A
B
B
www.netoptics.com
A
Intrusion
Prevention System
When the Bypass Switch is in Bypass Enabled mode,
all in-line traffic continues to flow on the network link
without being directed through the monitoring device.
Because in-line traffic is no longer
flowing through the monitoring
device, it may be removed and
replaced without downtime.
3
When there is no power
to the switch, it enters
Bypass Enabled mode.
2 6
Optical Bypass Switch
Power Loss Bypass (continued)
DC Plug Power Connector Models
The.BPO-SX.and.BPO-LX.models.use.a.standard.5.VDC.barrel.connector.
and.power.supply.to.power.the.switch ..
RJ45 Power Connector Models
The.BPO-SX-1.and.BPO-LX-1.models.use.a.Control.Port.with.an.RJ45.con-
nector.to.supply.power.to.the.switch.directly.from.a.source.on.the.in-line.de-
vice ..A.control.cable.with.connectors.appropriate.for.your.in-line.device.was.
provided.with.the.switch ..For.information.on.how.to.connect.the.control.cable.
to.your.device,.please.refer.to.the.documentation.for.your.in-line.appliance ..
For..
Control.Port.pinouts,.see.below .
Control Port Pinouts:
Pin Number
Description
1.
....Shunt.to.Pin.2
2.
....Shunt.to.Pin.1
3.
....No.connection
4.
....No.connection
5.
....No.connection
6.
....No.connection
7.
....Ground
8.
....+5.VDC 
Optical Bypass Switch
Connecting to the Network
1 .. Connect.Network.Port.A.to.the.appropriate.switch,.server.or.router.device ..
2 .. Connect.Network.Port.B.to.the.appropriate.switch,.server.or.router.device ..
3 .. Verify.that.the.Bypass.Switch.Network.Ports.are.cabled.in-line.between.
two.devices .
Figure 5.
Connecting to the Network
To switch, server, or router (DCE)
B
OUT
IN
OUT
IN
®
Optical Bypass Switch
Monitor
OUT
IN
IN
OUT
A
A
B
Network
B
A
B
A
A
A 
Optical Bypass Switch
Connecting to the In-line Security Device
1 .. Connect.Monitoring.Port.A.to.the.in-line.appliance.Port.A.using.a.duplex.
SC fiber cable.
2 .. Connect.Monitoring.Port.B.to.the.in-line.appliance.Port.B.using.a.duplex.
SC fiber cable.
3 .. Verify.that.the.Switch.Monitoring.Ports.are.cabled.in-line.between.two.
devices .
4 .. Connect.the.control.cable.or.power.supply.to.the.switch ..If.you.are..
installing.the.models.BPO-SX.and.BPO-LX,.make.sure.you.connect.the..
switches'.power.supply.to.the.same.power.sources.that.in-line.appliance..
is.using ..
Figure 6.
Connecting to the Monitoring Device
To In-Line Security Device
B
OUT
IN
OUT
IN
®
Optical Bypass Switch
Monitor
OUT
IN
IN
OUT
A
A
B
Network
B
A
B
A
A
A 
Optical Bypass Switch
Specifications
Splitter Specifications
Fiber Type: Multimode.Corning.62 .5/125µm,.wavelength,.850nm
Insertion Loss: Network Port: 1.25 dB

Monitor Port: 1.25 dB
Fiber Type: Singlemode.Corning.8 .5/125µm,.wavelength,.1300nm
Insertion Loss: Network Port: 1.25 dB

Monitor Port: 1.25 dB
Note: