The Cisco® QSFP-DD Open Line System (QSFP-DD OLS) is a pluggable optical amplifier module that, together with the channel breakout options (described later), provides a simple yet powerful open line system solution in a pluggable form factor that can be directly hosted on a Cisco router.

Cisco offers a comprehensive range of pluggable optical modules in the Cisco pluggables portfolio. The wide variety of modules gives customers flexible and cost-effective options for all types of interfaces. Thanks to the miniaturization of the technology with a 7-nm manufacturing procedure and innovation in silicon photonic technology, it was possible to squeeze a 400G-capable Digital Coherent WDM interface within a QSFP-DD form factor.