Juniper QDD-400G-ZR-M 400G QSFP-DD Metro DWDM | Optical Transceiver

Move 400G traffic across metro DWDM spans with an optical module engineered for demanding carrier and service-provider environments. The QDD-400G-ZR-M combines QSFP-DD density with 0 dBm output and duplex LC connectivity, giving network teams a practical path to high-capacity transport without expanding rack footprint. Standard-temperature operation from 0 to 70 °C makes it suitable for controlled edge, aggregation, and metro sites where equipment must hold performance across variable conditions. The 400G-ZR-M profile is built for long-reach optical transport, helping reduce the number of intermediate handoff points and preserving bandwidth for latency-sensitive workloads. For teams standardizing on dense optical infrastructure, this module fits where port efficiency and transport reach carry real cost impact. It is a strong choice for upgrading metro fabrics, extending backbone capacity, or adding high-speed interconnects to environments that need predictable optical behavior and carrier-grade deployment characteristics.