Transcript LambdaDriver ™ Family

LambdaDriver™ family
Wave Division
Multiplexing
MAN Bandwidth Demand
• Bandwidth doubling every 6-9 months
• Traffic nature more complex: TDM,ATM,FR,IP data, VoIP&Video
• Rapid grow in SAN and distributed processing
Source: CIBC World Markets, June 2001
Enterprise WAN Bandwidth
migration
Options for increasing
throughput
1.
Increase the Speed Limit:
Now
2001
2003?
1Gbps ->2.5Gbps ->10Gbps -> 40Gbps(OC768) -> 160Gbps
2. More wavelengths on the fiber:
1990 2001
1->2->4->16->32->160 --->?
3. Widen the band windows (widen the road)
Optical Transmission Bands
Bands:
Short 1470-1530nm
Conventional 1530-1570nm
Long 1570-1610nm
Multiplexing techniques
Tributaries are sent in specific time slots
Electrical
Signal Inputs
TDM
Tributaries are sent when capacity is available
Electrical
Signal Inputs
SMUX
Tributaries are sent on different wavelengths
Optical or
Electrical
Signal
WDM
WDM Market size
WDM principle
Input channels
Output channels
Mux
Ch#1
Ch#n
DeMux
λ1 - λn
Multiple wavelengths
transmission over
single fiber
Ch#1
Ch#n
DWDM versus CWDM
ITU Grid Standard(G692)
Frequency
(THz)
Wavelength
(nm)
196.1
1528.77
196.0
1529.55
195.9
1530.33
192.0
1561.42
191.9
1562.23
191.8
1563.05
191.7
1563.86
How close can they(l’s) be?
• Current filters can discriminate to around 25Ghz
• Min. Spacing = Max. Bit Rate x 2.5
Max Bit Rate
Min Spacing
10Gbps
40Gbps
25Ghz
100Ghz
WDM versus TDM
Function
WDM
SDH/SONET
Scalability
Just light on new wavelength
Costly and inefficient upgrade
Provisioning
Within days
Months
Protocol/Bit rate transparency
Yes
No
Bandwidth limits
Potentially unlimited – 2Tbps? 40Gbps?
Access interface
Direct wavelength mapping
OEO conversion before multiplexing
DWDM eliminates Regenerators
TDM Transmission – 10Gbps
OC48
40Km
OC48
40Km
OC48
40Km
OC48
40Km
RPTR
RPTR
RPTR
RPTR
40Km
RPTR
40Km
RPTR
40Km
RPTR
40Km
RPTR
40Km
40Km
40Km
40Km
40Km
RPTR
40Km
RPTR
40Km
RPTR
40Km
RPTR
40Km
RPTR
40Km
OC48
40Km
RPTR
40Km
RPTR
OC48
40Km
RPTR
RPTR
40Km
RPTR
40Km
RPTR
OC48
40Km
RPTR
OC48
DWDM Transmission – 10Gbps
120Km
4 x OC48
OA
120Km
OA
4 x OC48
SONET with WDM
• Existing SONET equipment investments can be preserved by
using WDM as transport layer
• SONET multiplexing equipment can be eliminated by direct
connection to OC48 interfaces
SONET
ATM
Switch
OC-n
OC48
OC48
Router
W
D
M
Fiber
Upgrading SONET/SDH
3 options for upgrading SONET ring:
1. Replace equipment, like OC48 to OC192
2. Install a new ring on new or existing dark fiber
3. Install one or more new rings by deploying WDM over
existing fiber.
May be the most important application in the near term!
Migration steps from
SONET/SDH to WDM
Direct interfacing
With edge equipment
1
3
Exchanging SONET
ADM’s with OADM’s
2
LambdaDriver
Ch#1
TM
λ1
Transponder 1
λ1
Access
Channels at “gray”
wavelengths
λ2
λ15
Mux
λ1 – λ16
λ16
λ2
λ15
Ch#16
structure
Transponder 16
λ16
Demux
Dual
Fiber
Link
Transponders
• Converts the access(gray) wavelength to WDM
specific wavelength(and vice versa).
• Performs 3R (reshape,retime,retransmit) function
• Hot swappable, undependable modules
Multiplexer/Demultiplexer
Passive units which combine (Multiplex) number of incoming
fibers into one fiber and splits (DeMultiplex) one fiber into
number of outgoing fibers.
Multi-wavelength
signal
Demultiplexed
Wavelengths
Demultiplexed
Wavelength
DeMux
Optical Add/Drop Multiplexing
• When building a Ring topology only part of the
wavelengths need to be dropped/added at every node.
• OADM’s – “pass through” without substantial
attenuation all the channels that are not dropped at that
location.
OADM
“added”
wavelength
OADM
“dropped”
wavelength
“added”
wavelength
“dropped”
wavelength
1+1 Protection
Provides automatic optical protection for the link
Primary link
DeMUX
MUX
Secondary link
Optical Amplifier
• This is an optional module, used for long(more than 50Km)
distances. No OEO conversion!
• Could be placed after MUX(post), before DeMUX(pre) or
between sites (in line).
• Currently available only for DWDM wavelengths range
Post OA
Line OA
Pre OA
DeMUX
Post OA
MUX
Site A
Site B
EDFA Principle
EDFA - Erbium-doped fiber amplifier – amplifies light in the
1540 nm window.
LambdaDriver™ Management
• Provides configuration and link fault monitoring
• Runs the management tasks and interfaces external managers by
means of SNMP, Telnet and CLI. Redundant CPU – optional.
• OSC (Optical Service Channel) – allows management of the
remote unit using separate wavelength (1310nm).
• Service module – responsible for combining/splitting the OSC
with the WDM trunk
Access Protocols
• Potentially any protocol with rates from 100Mbps
up to 2.5Gbps.
• LambdaDriver™ family currently supports:
Fast Ethernet, Gigabit Ethernet, Fiber Channel,
OC3, OC12 and OC48 protocols.
• Other rates are possible per request.
• Rate Adaptive Transponders are available.
LambdaDriver™ Family
LD1600 – 16 slot modular chassis for up to 16 DWDM channels
LambdaDriver
1600 front view
LambdaDriver™ Family
• LD800 – 8 slot modular chassis for up to 8 DWDM/CWDM
channels, OADM and media converters managed hub.
• Targeted for lower bandwidth and cost applications.
• Will host the same type of transponders as in the LD1600 box.
• Will host either 8 channel DWDM, 4 channel CWDM or OADM
cards
Mux/DeMux
Transponders
Power
Supplies
Lambda Driver™ Family
•LD10x – Stand alone units for media conversion and
2 wavelength single fiber operation.
•Currently available the following products:
FE copper to fiber (Multimode&Singlemode)
converters with dual and single fiber operation.
Network Topologies
Point-To-Point connection
between two sites
Network Topologies
Ring topology implemented by loop backs
Network Topologies
Master Site
Ring Traffic
Input
Slave Site B
Slave Site A
Ring Trunk
Ring Trunk
OADM
Mux/DeMux
Dropping ch#1
OADM
Dropping ch#5
Adding ch#1
Ring topology implemented by OADM’s
Ring Traffic
Output
Adding ch#5
Single fiber operation
Switches/Routers with WDM
wavelength uplinks
LD1600
Access switches
Transponder
Transponder
Transponder
WDM Trunk
Mux/DeMux
Transponders elimination by using
WDM wavelengths on switches
Access switches
WDM Wavelength
WDM Wavelength
WDM Wavelength
LD1600
WDM Trunk
Mux/DeMux
Advantage in using switches
with WDM Add/Drop uplinks
Add/Drop Site
Ring Trunk
Ring Trunk
OADM
Add/Drop Site
Dropping ch#1
Switch
Adding ch#1
Ring Trunk
Ring Trunk
Switch
Cost and space
savings
Building a Ring with WDM
oriented switches
Switch with WDM
Wavelength uplinks
LD1600
Switches with WDM
Add/Drop uplinks
Road map
Q3:
• LD1600, LD800 – betha testing
• LD10x – first customer shipment
Q4:
• OADM for DWDM & CWDM betha testing
• OADM uplinks for Optiswitch switches
• WDM Gigabit uplink for Optiswitch switches
• LD10x – managed solutions
Road map
Q1/2002:
•
Sub Rate multiplexer - Low rate protocols(like ESCON )
are TDM multiplexed for maximum utilization of the available
wavelength
Sub-rate MUX
Low
Speed
Protocols
ITU wavelength
2002 year developments
AND…
Going Wireless!
l

Summary of
LambdaDriver™ Main features
• Modular design, allows for lower initial costs and future upgrades
• Choice of DWDM(up to 16 channels) or CWDM(up to 8
channels) technologies.
• Access protocols flexibility – allows for mixing of different speeds
and protocols.
• Transponders with software controllable access rate.
• Redundant P.S. and CPU’s
• 1+1 Redundancy on the trunk - optional
• Integrated Optical Add/Drop ability
• Integrated Optical Amplifier(EDFA) as an option – for longer
distances transmission