Overview
The BRIDZA STW-NT series network time servers provide high-performance NTP and PTP (IEEE 1588v2) synchronization for enterprise networks, data centers, and telecommunications infrastructure. With throughput exceeding 140,000 NTP responses per second and timing accuracy within 25ns to UTC, these servers are the backbone of precision timing for modern networks.
Supported Models
| Model |
NTP Response Rate |
PTP Support |
Oscillator |
| ------- |
------------------ |
------------- |
------------ |
| STW-NT100 |
100,000/s |
Yes |
OCXO |
| STW-NT200 |
140,000/s |
Yes |
Rubidium (optional) |
Front Panel Layout
┌────────────────────────────────────────────────────────────────┐
│ BRIDZA STW-NT200 NETWORK TIME SERVER │
│ │
│ ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐ │
│ │ PWR │ │ ETH1 │ │ ETH2 │ │ GNSS │ │ PTP │ │ ALM │ │
│ │ ● │ │ ● │ │ ● │ │ ● │ │ ● │ │ ○ │ │
│ └──────┘ └──────┘ └──────┘ └──────┘ └──────┘ └──────┘ │
│ │
│ NETWORK PORTS GNSS ANTENNA TIME OUTPUTS │
│ ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐ ┌────┐ │
│ │ ETH1 │ │ ETH2 │ │ ANT │ │ 1PPS │ │10M │ │
│ │RJ45 │ │RJ45 │ │ ● │ │ OUT │ │Hz │ │
│ └──────┘ └──────┘ └──○───┘ └──○───┘ └──○─┘ │
│ │
│ ┌──────────────────────────────────────────────────────────┐ │
│ │ ALARM 1PPS IN DC INPUT CONSOLE │ │
│ │ ┌────┐ ┌────┐ ┌────┐ ┌────┐ │ │
│ │ │RELAY│ │BNC │ │ ○- │ │USB │ │ │
│ │ └────┘ └────┘ └────┘ └────┘ │ │
│ └──────────────────────────────────────────────────────────┘ │
│ │
│ MODEL: STW-NT200 S/N: __________ REV: 3.0 │
└────────────────────────────────────────────────────────────────┘
Interface Definitions
1. Network Ports
| Parameter |
Specification |
| ----------- |
--------------- |
| Connectors |
2× RJ45, 10/100/1000BASE-T |
| Standards |
IEEE 802.3, 802.3u, 802.3ab |
| Auto-negotiation |
Yes |
| MAC Address |
Labeled on unit |
Pin Assignment (RJ45):
┌───────────────┐
│ 8 7 6 5 4 3 2 1 │
│ │ │ │ │ │ │ │ │ │
│ ┴─┴─┴─┴─┴─┴─┴─┴ │
│ │
Pin 1: TX+ │
Pin 2: TX- │
Pin 3: RX+ │
Pin 6: RX- │
Pins 4,5,7,8: NC │
└───────────────────┘
2. NTP Protocol
| Parameter |
Specification |
| ----------- |
--------------- |
| Version |
NTP v4 (RFC 5905) |
| Mode |
Server, Client, Symmetric Passive |
| Throughput |
>140,000 responses/sec |
| Accuracy |
≤25μs (local network) |
| Authentication |
MD5, SHA-1, AES |
| Access Control |
ACL-based |
3. PTP (IEEE 1588v2)
| Parameter |
Specification |
| ----------- |
--------------- |
| Profile |
Default (General), Power (PoweDev) |
| Domain |
0-255 (configurable) |
| Mode |
Master, Slave, Transparent Clock |
| Delay Mechanism |
P2P, E2E |
| Accuracy |
≤25ns to Grandmaster |
| VLAN |
802.1Q supported |
| Parameter |
Specification |
| ----------- |
--------------- |
| Connector |
SMA female |
| DC Power |
5V @ 100mA |
| Supported |
GPS, BeiDou, GLONASS |
| Timing Accuracy |
≤25ns RMS |
| Parameter |
Specification |
| ----------- |
--------------- |
| Connector |
BNC female |
| Level |
TTL (3.3V/5V) |
| Impedance |
50Ω |
| Pulse Width |
1μs to 10ms |
| Accuracy |
≤±100ns to UTC |
6. 1PPS/10MHz Output
| Parameter |
1PPS Output |
10MHz Output |
| ----------- |
------------- |
-------------- |
| Connector |
BNC female |
SMA female |
| Level |
TTL/LVPECL |
13dBm |
| Impedance |
50Ω |
50Ω |
| Jitter |
≤500ps |
- |
7. Alarm Output
| Parameter |
Specification |
| ----------- |
--------------- |
| Connector |
Terminal block (3-pin) |
| Type |
Form C relay |
| Rating |
0.5A @ 30VDC |
| Functions |
GNSS fault, Holdover, Power failure |
Pin Assignment:
┌─────────────────┐
│ NC COM NO │
│ │ │ │ │
│ └──┬─┘ │ │
│ │ │ │
└──────┴──────┴───┘
NC: Normally Closed
COM: Common
NO: Normally Open
Configuration Methods
Web Interface
- URL: http://
- Default: 192.168.1.100
- Username: admin
- Password: admin
CLI (Console/RS232)
| Parameter |
Specification |
| ----------- |
--------------- |
| Connector |
USB (virtual COM) or RS232 (DB9) |
| Baud Rate |
115200 |
| Data Bits |
8 |
| Parity |
None |
| Stop Bits |
1 |
CLI Commands:
# Network Configuration
network set eth0 static 192.168.1.100/24 192.168.1.1
network set dns 8.8.8.8
# NTP Configuration
ntp server add 0.pool.ntp.org
ntp server list
ntp enable
# PTP Configuration
ptp mode master
ptp domain 0
ptp enable
# GNSS Configuration
gnss mode gps+beidou
gnss ant delay 30
# Status
show status
show gnss
show ntp
show ptp
SNMP
| OID |
Description |
| ----- |
------------- |
| 1.3.6.1.4.1.x.1.1 |
System uptime |
| 1.3.6.1.4.1.x.2.1 |
NTP status |
| 1.3.6.1.4.1.x.2.2 |
GNSS status |
| 1.3.6.1.4.1.x.2.3 |
Holdover duration |
Power Supply
| Parameter |
Specification |
| ----------- |
--------------- |
| Voltage |
+12VDC or 100-240VAC (with adapter) |
| Current |
1.5A @ 12VDC |
| Power |
≤20W |
| Connector |
5.5×2.1mm DC jack |
Mechanical Dimensions
482mm (19" rack width)
┌─────────────────────────────────────┐
│ │ 44mm (1U)
│ STW-NT200 │
│ NETWORK TIME SERVER │
│ │
│ [ETH1][ETH2] [ANT] [1PPS][10M] │
│ │
└─────────────────────────────────────┘
└── 300mm ──┘
Typical Configuration
# Initial Setup
connect 192.168.1.100
login admin admin
# Configure for Primary Time Source
ntp master stratum 1
gnss enable
ntp enable
# Configure PTP Grandmaster
ptp enable
ptp mode master
ptp powerprofile disable
# Add Backup NTP Servers
ntp server add 1.pool.ntp.org
ntp server add 2.pool.ntp.org
# Save Configuration
config save
Troubleshooting
| Symptom |
Cause |
Solution |
| --------- |
------- |
---------- |
| ETH LED off |
Cable disconnected |
Check Ethernet cable |
| - |
Wrong speed/duplex |
Set auto-negotiation |
| NTP timeout |
Firewall blocking |
Open UDP 123 |
| - |
Stratum too high |
Check server configuration |
| PTP not working |
VLAN mismatch |
Verify VLAN settings |
| - |
Delay mechanism |
Verify P2P/E2E setting |
| GNSS LED off |
Antenna issue |
Check antenna and cable |
| Holdover active |
GNSS signal lost |
Check antenna position |
Download Resources
Document Version: 1.0
Last Updated: 2026-05-24
BRIDZA Technologies