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LPPS Transmission Modules
Light Path Protection
Switch Family
Light
Path Protection Switch
The
dedicated resource restoration scheme in a survivable optical network
supports faster restoration time and guarantees on the restoration ability.
The 1+1 protection method is an elementary way of the dedicated restoration
scheme. In this method, a dedicated link-disjoint backup route is set
up in advance at the time of connection setup. Upon a link failure on
the primary path, the end-nodes of the connection start utilizing the
backup route.
The
primary path is the default path to be protected by the Light Path Protection
Switch. The secondary path is used to restore the light path connection
in the event that path failure happened at the primary path such that
the primary path light power is lower than a preset thresahold value,
or vice versa. The status of both primary and secondary paths is always
monitored by a microprocessor.
The
Enhanced LPPS allows 1:1 optical path protection on bi-directional WDM
transmission. Simultaneous switching between both ends of LPPS achieved
within 25 ms without using either in-band or out-of-band signaling.
With 2x2 Enhanced LPPS, the protection fiber can be further utilized to
accommodate low priority traffic. The patent-pending Enhanced LPPS has
a built-in proprietary monitor, which prevents false triggering of
the switch as a result of Near-end Crosstalk (NeXT).
Features
- Automatic optical
switching within 25 ms
- Independent of
transmission rate and format
- Monitoring on both
primary/secondary paths
- Programmable thresholds
- Exceeds 40 dB monitoring
dynamic range
- Alarm/status notification
via Fax/On-Screen Alert, Email, SMS message
- Accessible via
the internet and dial-up
- PC and PDA (Pocket
PC) GUI available
- Data-logging on
optical power level and alarm history
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Compliance
FCC Part 15, Class A
EN 60950
EN 55022
EN 55024 |
Applications
- Optical Path protection
for Gigabit Ethernet, DWDM Equipment, CATV, PDH, Video, IP/ATM, Fiber-to-RF Feeders,
Point to point/Long hand optical systems, Metropolitan optical network
- Bi-directional WDM, CWDM or DWDM
transmission Protection
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