The Five Things You Need to Know Before Migrating to 40 100G Speeds
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Transcript of The Five Things You Need to Know Before Migrating to 40 100G Speeds
The Five Things You Need to Know Before Migrating to 40/100G Speeds
December 14, 2011
©2011 CABLExpressAll rights reserved. All trademarks are property of their respective owners.
Today’s Agenda
• An archived version of this webinar will available at www.cablexpress.com/webinars by Dec 21st.
• Presentation Agenda:
– Introductions
– The Five Things You Need to Know Before Migrating to 40/100G Speeds
– Conclusion/Q&A
• Presented by:
– Kent Goldsmith, Engineering Manager, CABLExpress
– Josh Taylor, Senior Product Manager, CABLExpress
©2011 CABLExpressAll rights reserved. All trademarks are property of their respective owners.
The connector of choice
• MPO style connector
– Multimode vs. Singlemode
– Parallel vs. Serial Transmission
– Transceivers
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Multimode vs. Singlemode
• We have choices:
– Distance
– $$$
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Parallel vs. Serial Transmission
• Serial Transmission
– Duplex transmission
– Speed limitations
Typical 1G Transceiver The LC duplex
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Parallel vs. Serial Transmission
• Parallel
– Multiple fibers
– MPO style connector
100G parallel optics
40G parallel optics
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Parallel vs. Serial TransmissionRX TX RX TX
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Parallel vs. Serial Transmission
100G Ethernet40G Ethernet
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Transceivers
Xena Networks CF-X12-C11901-01 100G Ethernet CFPTransceiver Module
100G transceiver
Typical 1G/10G Transceiver
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#1: Choosing a Connector
Link Distances and Loss Amounts
• Max Link Lengths
– OM3 = 100M
– OM4 = 150M
• Max Loss Budgets
– OM3 = 1.9dB
– OM4 = 1.5dB
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#2: Total Link Distance and Loss Budget
10GB IEEE Loss Budget: 2.6dBSkinny-Trunk® Maximum Loss Budget: 1.55dB
Headroom : 1.05dB
H Series Module
.4dB
Z Mount.35dB
H Series Module
.4dB
H Series Module
.4dB
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#2: Total Link Distance and Loss Budget
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#2: Total Link Distance and Loss Budget
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#2: Total Link Distance and Loss Budget
What is Skew?
skew
Skew: The difference between arrival times of the parallel transmitted signal as they reach the receiver on the other end.
79 nanoseconds = 0.000000079 seconds
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#3: Skew
Skew is not an issue with CABLExpress Skinny-Trunk products…why?
• The 802.3ba standard specifies 79 nanoseconds (79,000 picoseconds)
• The devices that measure skew do it in picoseconds
• 8 picoseconds is a typical skew measurement
• The standard calls for a 79,000 ps maximum
• Typical skew numbers are nowhere near that
• Conclusion: Skew is not an issue (when working with CABLExpress)!
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#3: Skew
What Bandwidth “Glass”?
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#4: What bandwidth glass?
TIA 802.3baPhysical Layers for 40Gb/s and 100Gb/s
OM3
• 100 meter Link Limit
OM4
• 150 meter Link Limit
The benefit of OM4 is 50m more distance.
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#4: What bandwidth glass?
Producing OM4 LASER Optimized Glass
• OM2 glass is intentionally drawn from a different production source
• Both OM3 and OM4 glass are produced (drawn) from the same production source
• The goal of this manufacturing process is to produce OM4 grade glass
– Most of what is produced is OM3 grade
– That’s why OM4 is more expensive
– OM4 glass can be 30% to 40% more than OM3
– This is changing as the manufacturing process is improved
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#4: What bandwidth glass?
• If managed properly, you DON’T have to think about it
• If not, it can cause major issues
• There are 3 methods recognized by TIA-568-C.01. Method A
2. Method B
3. Method C
• Try and deploy only 1 method per site.
Polarity (Light Path): Polarity maintains working optical link
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#5: Light Path
Duplex Parallel
Method A • Different jumpers are needed for this method • For parallel signals, an extended trunk will most likely be needed for workability, but necessary for link
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#5: Light Path
Duplex Parallel
Method B• Only method deploying MPO key up/key up couplers…doesn’t work for singlemode (will run into problems
with singlemode because of angle polish on MPO)• For parallel signals, an extended trunk will likely be needed for workability
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#5: Light Path
Duplex Parallel
Method C• For parallel signals, an extended trunk will most likely be needed for workability,
but necessary for link
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#5: Light Path
Polarity (Light Path): Conclusion
• Duplex hardware is in position now, future parallel hardware will likely be placed at a different location…extender trunks will be necessary
• All 3 methods are forward compatible regarding parallel signals
• Try not to mix deployment methods at the same site, this can lead to confusion
• Method C was the first method to be used in the industry
• Method C is the method with the fewest amount of issues
The Five Things You Need to Know Before Migrating to 40/100 G Speeds
#5: Light Path
Questions from the Audience?
©2011 CABLExpressAll rights reserved. All trademarks are property of their respective owners.
THANK YOU!
www.cablexpress.com
©2011 CABLExpressAll rights reserved. All trademarks are property of their respective owners.