Symmetricom S250 Network Time Server

The Symmetricom SyncServer S250 is a rack-mounted Stratum 1 GPS network time server, designed for high‑precision time synchronization across large or bandwidth‑intensive networks. Here’s what makes it stand out:

⏱️ Key Specifications & Features

• Stratum 1 Accuracy: Syncs directly to GPS satellites, offering ~50 ns accuracy to UTC  If GPS is unavailable, it can fall back to NTP (Stratum 2).

• Multi‑reference support: Automatically prioritizes GPS, IRIG‑B, 1 PPS, and 10 MHz inputs/outputs

• Triple Ethernet ports: Three independent 10/100Base-T interfaces serve large numbers of clients (up to ~5,000 NTP packets/sec 

• Flexible oscillator options: TCXO is standard; optionally upgrade to OCXO (better holdover) or Rubidium atomic oscillator (25 μs/day holdover)  

• User interface:

  • Front-panel vacuum fluorescent display + numeric keypad

  • Web interface with SSH/SSL/SNMP/Telnet/SCP/HTTPS support

  • Step-by-step wizards for setup

• IPv6 & IPv4 support

• Dual USB ports, Sysplex Timer output, email alerts for alarms/error

• Warranty: Typically 2–3 years (check with seller/refurbisher).

📈 Typical Use Cases

• Enterprise IT infrastructure: Ensures correct timestamps for logs, databases, security events, billing, etc.

• Financial or telecom networks: Precise timestamping for VoIP, transactions, and regulatory compliance.

• Laboratory/frequency applications: With OCXO/Rubidium and 1 PPS/10 MHz outputs, ideal as a GPSDO for test environments.