High-density 1U rack-mount serial device servers in 16-port (EZ 16) and 32-port (EZ 32) configurations. Available with RS-232 (A-series SKUs) or RS-232/422/485 software-selectable MEI (C-series SKUs). Both families offer single or dual field-replaceable AC power supplies, a dual 48 VDC option (EZ16-AD00) for substation and critical infrastructure, and optional LTE cellular via Digi CORE plug-in modem (Global Cat 4, dual SIM). Hardware includes dual 10/100/1000 Gigabit Ethernet, dual 10G SFP+ fiber uplinks, two USB 3.1 Gen 1 ports, and micro SD for data logging. No other 16/32-port serial device server on DigiKey offers integrated LTE in the same 1U form factor. Includes Digi RealPort COM/TTY redirector and TrustFence security (TLS 1.2+, FIPS 197, RADIUS/TACACS+, VPN). Every unit includes Digi LifeCycle Assurance: 5-year best-in-class hardware warranty, 1-year 24/7 expert technical support, and 1-year Premier access to Digi Remote Manager or Digi On-Prem Manager. After year one, per-device subscriptions are available to continue expert support and Remote/On-Prem Manager access.Key Features:• 16-port (EZ 16) or 32-port (EZ 32) RS-232 or RS-232/422/485 MEI software-selectable — 1U rack• Dual 10/100/1000 Gigabit Ethernet + dual 10G SFP+ fiber uplinks — data center ready• Redundant field-replaceable PSUs: single or dual AC (100–240 VAC) or dual 48 VDC (EZ16-AD00 — substation/critical infrastructure)• Optional Digi CORE LTE modem: Global Cat 4, dual SIM, 3G/2G fallback — cellular failover• USB 3.1 Gen 1 (2 ports) + micro SD for data logging• Digi RealPort (patented) | TrustFence security | Python scripting• Digi Remote Manager (cloud) or Digi On-Prem Manager — 1-year Premier access included• Digi LifeCycle Assurance: 5-year warranty + 1-year 24/7 expert support + 1-year Premier Remote/On-Prem Manager — renewable per-device after year one• 0–50°C | CE, FCC Part 15 | Ships with 19″ rack ears• SKU guide: A=RS-232 | C=MEI (RS-232/422/485) | G4=Cellular | 200=Dual AC PSU | AD00=Dual DC PSU