Digi International EZ16-AD00 16-Port Serial Device Server
The Digi International EZ16-AD00 is a 16-port serial device server designed for out-of-band remote management of networked infrastructure and serial-attached equipment. Built for telecom, enterprise, and security integrations requiring centralized console access without dedicated KVM or direct physical access, the EZ16-AD00 delivers secure, scalable serial connectivity across distributed locations. Industrial-grade operating temperature support enables reliable deployment in equipment rooms, outdoor cabinets, and temperature-variable environments where commercial-grade devices would fail.
Key Features
- 16 Serial Ports: Full-duplex RS-232/422/485 serial connectivity per port. Supports legacy serial devices, routers, switches, PDUs, and intelligent power distribution units requiring command-line or out-of-band access.
- SSH & HTTPS Encryption: Secure shell and HTTPS protocols for encrypted remote management. Eliminates plaintext Telnet exposure when configured as primary management channel, reducing attack surface in multi-user integration scenarios.
- SNMP 3 Monitoring: SNMP 3 with authentication and encryption for integrated monitoring into Nagios, Zabbix, or PRTG infrastructure. Real-time port status and device reachability without dedicated polling agents.
- Rack-Mountable Form Factor: Standard 1U rack housing integrates directly into 19-inch telecom and server cabinet infrastructure. Shared power/network backbone with existing equipment reduces per-port cabling complexity.
- Industrial Temperature Range: Rated for industrial-grade operating temperatures. Reliable operation in non-climate-controlled equipment rooms, outdoor network cabinets, and sites with seasonal temperature swings that stress commercial-grade hardware.
- Additional Management Protocols: SCP file transfer, NTP time synchronization, Syslog forwarding, and SMTP alerting. Flexible integration with centralized logging and authentication systems (RADIUS, TACACS+) via configuration.
- 5-Year Limited Warranty: Extended manufacturer warranty covers hardware defects across multi-year deployments without per-unit replacement costs.
Serial device management remains critical in security operations, network infrastructure, and industrial automation. Many legacy devices—access control panels, PTZ camera controllers, environmental monitors, UPS units, and out-of-band management interfaces on core routers—expose only serial console ports. The EZ16-AD00 virtualizes those serial connections over Ethernet, enabling IT teams and security integrators to manage 16 devices from a single network interface without traveling to each cabinet or maintaining tangled serial cables across a facility.
The combination of SSH/HTTPS encryption and SNMP 3 support addresses compliance requirements in financial services, healthcare, and government sectors where plaintext management access is prohibited. Integrators can retire Telnet-only consoles and replace them with encrypted alternatives while maintaining backward compatibility with legacy devices that only understand serial input. Port-level access control and user authentication policies can be enforced at the device server level, reducing reliance on individual serial-device permission models.
In distributed deployments—data centers with remote branch locations, multi-building campuses, or geographically dispersed PDU and monitoring infrastructure—the EZ16-AD00 collapses operational overhead. A single unit replaces 16 individual serial-to-Ethernet adapters, reducing power consumption, network port utilization, and cost of ownership. Industrial-grade temperature rating ensures consistent performance in non-climate-controlled equipment rooms or outdoor cabinets subject to seasonal temperature variation; this differentiates the EZ16-AD00 from commercial-grade alternatives that derate or fail in those environments.
The EZ16-AD00 integrates with SNMP-capable management platforms (Nagios, Zabbix, Icinga, PRTG) and supports syslog forwarding to centralized logging infrastructure (Splunk, ELK, Graylog). SSH and SCP enable scripted provisioning workflows and configuration backups. Wired Ethernet connectivity (standard RJ45) works with any managed or unmanaged switch; no specialized network fabric is required. Digi's web-based configuration interface and command-line CLI both support bulk serial-device provisioning, reducing time-to-deployment for large serial estates.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed the Digi EZ16-AD00 across enterprise network operations, security operations centers, and multi-building campus infrastructure where out-of-band serial access is mission-critical. The device server sits at the intersection of legacy serial equipment and modern encrypted management — a problem that never goes away in enterprise environments. What makes the EZ16-AD00 stand out is industrial temperature tolerance. We've seen commercial-grade serial adapters fail or derate in non-climate-controlled equipment rooms, especially in seasonal climates or outdoor cabinets. The EZ16-AD00 doesn't; it's rated for the temperatures that real infrastructure rooms actually see. On a 16-port capacity, that translates to a single rack unit replacing dozens of point adapters. The SSH/HTTPS encryption and SNMP 3 support eliminate the compliance risk of plaintext Telnet, which is still endemic in serial device management. In our experience, replacing Telnet with SSH on 16 serial-attached devices — routers, PDUs, access control panels — cuts audit findings meaningfully. That said, the EZ16-AD00 is not a replacement for a proper terminal server (which handles true multiport async access with higher port density); it's purpose-built for infrastructure device management and serial console virtualization. For security integrators managing camera control systems, environmental monitors, or UPS interfaces, the value is consolidation and encryption without rework of the serial device itself.
Technical Highlights:
- SSH & HTTPS Encryption: All remote management traffic is encrypted end-to-end. SNMP 3 replaces SNMP v1/v2c plaintext — audit-critical in regulated environments. Telnet fallback exists for legacy serial devices that only accept unencrypted input, but can be disabled via policy to prevent accidental downgrade attacks.
- 16 Full-Duplex Serial Ports: Each port is independent and full-duplex, supporting RS-232, RS-422, and RS-485 serial standards without per-port jumper configuration. Bit rates from 300 baud to 230400 baud accommodate both legacy slow equipment and modern high-speed serial interfaces.
- Industrial Operating Temperature (-40°C to +70°C typical): Rated for temperature extremes that commercial equipment avoids. We've fielded units in uninsulated outdoor equipment cabinets, heated server rooms, and seasonal locations. No thermal derating or unexpected shutdown in real-world conditions.
- Rack-Mount 1U Form Factor: Integrates directly into 19-inch infrastructure without external mounts or brackets. Shares power and network backbone with existing equipment, reducing cable clutter and per-device footprint cost.
- SNMP 3 + Syslog Integration: Pairs with centralized monitoring (Nagios, Zabbix, Splunk, ELK). Port reachability, configuration changes, and authentication events are logged and alerted without custom polling agents.
Deployment Considerations:
- Serial device port settings (baud rate, data bits, stop bits, parity, flow control) must match the attached equipment exactly. Mismatched serial settings will appear as garbage or connection loss. Validate serial pinout and parameters before installation — many integrators skip this step and spend hours troubleshooting communication failures that are actually configuration mismatches.
- The EZ16-AD00 is a serial virtualization device, not a remote power controller. If you need to remotely power-cycle a serial device, pair it with a networked PDU on a separate port or power outlet. The device server manages console access, not power state.
- SSH keys and user authentication should be provisioned at installation. Default credentials should be disabled immediately — we've seen industrial facilities leave Telnet open with default passwords as a convenience, which is a fast path to unauthorized access. Enforce SSH as the only remote access method if your serial devices support it.
- Network bandwidth is negligible (serial is low-speed); a single shared switch port handles all 16 serial streams simultaneously. No need for dedicated network interfaces or QoS provisioning unless you're aggregating dozens of device servers on the same switch.
- Industrial temperature rating applies to the device server itself; verify that the serial cables and connector types (DB-9, RJ-45 adapters, etc.) are also rated for your environment. Cheap cables in outdoor cabinets degrade faster than the host equipment.
The EZ16-AD00 is the right choice for infrastructure and security integrators managing serial-attached equipment across distributed locations and needing compliance-grade encryption without equipment replacement. For the details, see the Digi International catalog.
