EX4400-EM-4S, Juniper EX4400 Switch Extension Module, 4x10G SFP+ ports/EX4400 series/extension module

The Juniper EX4400-EM-4S is an enterprise-class extension module developed for organizations looking to scale their Juniper networks with agile performance and reliability. Specifically designed for integration with the EX4400 series switches, this module enhances network architectures by offering flexible 4x10G SFP+ uplink capabilities—connecting seamlessly to high-speed fiber backbones for improved data throughput and distribution. As part of a modern modular switching environment, the 4x10G SFP+ configuration optimally addresses bandwidth-intensive use cases, while ensuring secure, uninterrupted uplinks across evolving enterprise and campus deployments. Supporting both 1G and 10G via SFP+ interfaces (though not simultaneously mixed), this module delivers adaptable port speeds for various transition phases or future upgrades, underscoring its value in dynamic switch infrastructures. As a dedicated solution for the EX4400 series, it is engineered for straightforward installation in front-panel slots, making network expansion quick and reducing operational downtime. For administrators and system integrators, features such as per-port link status indicators, CLI-based configuration, and hot-swap with mandatory offlining via CLI, contribute to easier management, resilience, and service continuity. Passive cooling, absence of moving parts, and native compatibility with Junos OS 21.1R1 or later, further ensure reliable operation with minimal maintenance overhead. Whether serving distributors aiming for competitive differentiation, system integrators extending modular solutions, or end-users optimizing their enterprise IT environments, the Juniper EX4400-EM-4S module provides high-value switch port extension and investment protection, resonating with the needs of fast-growing, high-density network infrastructures across global markets.

Product Features Comparison

Model	Juniper EX4400-EM-4S	C9300-NM-4M	C9500-NM-8X	C9400-LC-24XS
Brand	Juniper	Cisco	Cisco	Cisco
Module Type	4x10G SFP+ Extension	Uplink Module	Network Module	Line Card
Port Configuration	4x 10G SFP+ (supports 1G SFP or 10G SFP+, not mixed simultaneously)	4 x 10G SFP+	8 x 10G	24 x 10GE/1GE SFP+ ports
Supported Speed	10G (default); 1G via CLI	10 Gbps	10 Gbps	10 Gbps or 1 Gbps (configurable per port)
Compatible Platform	EX4400 series switches	Catalyst 9300 Series Switches	C9500 Series	Cisco Catalyst 9400 Series switches (C9404R / C9407R / C9410R)
Installation Type	Front-panel slot	Plug-In Module	Plug-in module for Catalyst 9500 chassis	Plug-in module (1 slot)