This topic explains how the QDD optical line system integrates amplification into a QSFP-DD pluggable module to interconnect routers or switches over a single-span point-to-point link, removing the need for an external optical line system chassis.
A QDD optical line system is a pluggable optical amplifier that
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integrates amplification directly into a QSFP-DD module, eliminating the need for external OLS chassis
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enables two routers or switches to interconnect and transport a limited number of coherent optical channels over a single span point-to-point link, and
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increases fiber bandwidth and transmission reach through compact, energy-efficient amplification.
| Feature Name |
Release Information |
Description |
|---|---|---|
| QDD Optical Line System |
Release 25.3.1 | The QDD Optical Line System (OLS) is a new pluggable optical amplifier that interconnects two routers or switches for transmitting traffic on a limited number of coherent optical channels over a single span point-to-point link. With the QDD OLS pluggable, it’s now possible to obtain the functionality of amplification into a QSFP-DD module that can be plugged into a port of the line card. The benefits of this pluggable are:
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Simplifying network infrastructure with QDD-based optical line systems
Traditional optical line systems (OLS) require separate chassis-based solutions—such as Cisco NCS 1000 or 2000 Series—with multiplexers/demultiplexers (MUX/DMX) and amplifiers. The QDD optical line system simplifies this model by combining amplification functionality into a QSFP-DD pluggable module, installed directly in compatible router or switch ports, with passive cables providing MUX/DMX capability.
