SC Series NTP Servers

A range of competitively-priced, full-featured stratum 1 GPS \ LF radio NTP time servers in a compact enclosure. Available as universal mains or DC IN versions.


PLEASE NOTE: TimeTools SC Series has now been superseded by the T100 Compact GPS NTP Server.



TimeTools SC Series NTP Time Server - Font Panel


Key Features

  • Range of Competitively Priced NTP \ SNTP Network Time Servers
  • Housed in a Compact Aluminium Enclosure
  • Dual, GPS and Radio and Reference Clock Options
  • Integrated GPS Timing Receiver with Single Satellite Operation
  • High Stability TCXO Options for Extended Holdover
  • Convection Cooled with Very Low Power Consumption
  • Universal Mains or DC-IN Versions


  • Accurate Time Reference for Windows, Linux and UNIX Time Clients
  • Synchronize Network Infrastructure, Telephone Systems, CCTV Cameras, DVR’s
  • Secure, Reliable Source of Time Inside Your Firewall
  • Serves Thousands of Network Time Clients
  • Accurately Synchronise Time Critical Processes


Product Description

TimeTools SC Series provides a complete range of Linux-based, true Stratum-1, NTP Network Time Servers that represent a real breakthrough in price and performance.

Housed in a rugged, compact, aluminium enclosure, the SC series takes up minimal space.

By utilising a customized Linux kernel and an unmodified version of the latest network time protocol distribution, NTP version 4.2, the SC series offers true NTP / SNTP functionality.

GPS, Radio and Dual Reference Clock Options
Multiple external reference clock combinations can be provided with the SC series; GPS, MSF radio, DCF-77 radio and dual GPS / radio reference capabilities. The SC series provides true flexibility.

The SC series is also provided with a cutting-edge high-sensitivity GPS receiver that can often operate with an indoor located GPS antenna. Additionally, the new receivers can operate from a single satellite-in-view making operation from a window often possible. These features potentially provide a great saving on installation costs when compared to traditional roof-mounted GPS antennas. Of course, our GPS antennas are completely weatherproof and can be roof-mounted outdoors.

High Stability Extended Holdover Option
High-stability GPS/LF disciplined Temperature Controlled Crystal Oscillator (TCXO) options are available to maintain accurate time for extended periods in the event of GPS / radio reference clock signal loss.

Secure Configuration and Maintenance
A secure (HTTPS), easy to use, password-protected user interface is provided for system configuration and management. FTP/SCP can be utilised to download NTP statistics and upload firmware upgrades, available from TimeTools free of charge.

5-Year Warranty
The SC Series NTP Server is a low-power convection cooled device with no moving parts, aiding long-term reliability. Our confidence in the reliability of the device is reflected in the provision of an industry leading 5-year warranty.

SC7105 Entry Level, Competitive Price
The SC7105 is an entry-level Linux-based true NTP time-server at a highly competitive price. It can utilise GPS or LF radio time references to provide stratum-1 NTP functionality, ideal for synchronizing digital clocks, DVR’s and smaller networks.

SC9205 Feature Rich, Value
The mid-range SC9205 provides a high specification NTP network time reference. It incorporates a high-throughput Ethernet network interface, combined with the ability to accept GPS, LF radio or dual GPS / LF radio external time references. The SC9205 is an ideal time reference where a large number of network time clients are to be synchronised accurately and reliably.

SC9705 High Stability, Extended Holdover
The SC9705 provides all the features of the SC9205 with the additional benefit of a high-stability disciplined TCXO oscillator for extended holdover in the event of primary reference loss. Ideal where a highly reliable source of time is required.

[wptabs style=”wpui-light” effect=”fade” mode=”horizontal”][wptabtitle]Features[/wptabtitle] [wptabcontent]

Model Comparison Chart

   LAN 10/100 Mbit BaseT , RJ45 auto-sensing
Timing Protocols
   NTP v2, v3, v4, SNTP v3, v4
   NTP Peering
   NTP Broadcast
   NTP MD5 Authentication
   NTP Requests / Second (typical)
> 200
> 1000
> 1000
   Maximum Number of NTP Clients (typical)
> 64,000
> 64,000
   NMEA RS232 Output
Time Reference Options
   12 Channel GPS Receiver High Sensitivity Indoor,    Over-Determined Clock, Single Satellite Operation
   LF – MSF (UK) Reference Clock
   LF – DCF-77 (German) Reference Clock
Dual GPS and LF Radio Reference Clocks
Monitoring and Reporting
   SNMP v1 / v2c Trap Alarms (Can be disabled)
   System Logging (SysLog)
   Remote System Logging (Remote Syslog)
   GPS Satellites in View & Signal to Noise Ratio (SNR)
Configuration Protocols
   HTTP (Web) / HTTPS (SSL Secure Sockets Layer)
   SSH (Secure Shell), SCP (Secure Copy Protocol)
   Console (RS232)
Oscillator Options
   Standard Crystal Oscillator
   High Stability GPS\LF Disciplined TCXO Oscillator
Timing (Typical)
   GPS Accuracy
1 msec
60 nsec
60 nsec
   LF Accuracy
10-50 msec
1-20 msec
1-20 msec
   NTP Accuracy (typical, GPS Synchronised)
<10 msec
< 250 usec
< 250 usec
   24 Hour Holdover (GPS disciplined, typical @ 25C)
<±10 msec (2.3e10-7)
   Buffered 1 PPS Output on BNC


[/wptabcontent][wptabtitle]Specification[/wptabtitle] [wptabcontent]

Mechanical\Environmental Specification

Dimensions 168 x 165 x 54 mm (6.5″ x 6.5 ” x 2.2 “)
Construction 1.8mm Aluminium
Weight approx 0.8Kg (1.84lbs)
Power Supply Universal 100-250 VAC 50- Hz CE/UL/CSA Approved PSU
(Optional 9-36V DC IN and 85-250V DC IN versions available)
Power Consumption approx 5W
Operating Temperature 0C ~ +50C (Extended temperature range options available)
Storage Temperature -10C ~ +60C (Extended temperature range options available)
Relative Humidity 95% non-condensing
Approvals CE, EN61000-6-1, EN61000-6-3


Input\Output Specification

LAN 10/100 Mbit BaseT , RJ45 auto-sensing
Serial Console 9 way ‘D’ RS232, 9600, N, 8, 1
GPS Input TNC female
LF/AUX Input: 9 way ‘D’
Power Double Fused IEC Inlet
PPS (optional) Buffered pulse per second output on BNC (optional)

Integral GPS Receiver Specification

Type True GPS Timing Receiver, 12 Channel, L1 1575.42 MHz
Features High sensitivity, Over-determined clock modes, Single satellite in view
Timing GPS Time Traceable to UTC (USNO)
Accuracy +/- 60 nsec UTC (typical)
Acquisition (Cold Start) 38 sec

[/wptabcontent][wptabtitle]Product Codes[/wptabtitle] [wptabcontent]

SC Series NTP Time Servers Product Codes

SC 7105 GPS \ LF NTP Server SC7105-20P
SC 9205 GPS \ LF \ Dual Reference NTP Server SC9205-20P
SC 9705 GPS \ LF \ Dual Reference NTP Server with TCXO SC9705-20P
Scope of Supply: SC Series NTP Time Server, IEC Mains Lead,
Console Configuration Cable, Product User Guide and NTP Client CD.

(Optional 9-36VDC IN, 85-250VDC IN and extended temperature range versions available.)


Optional SC Series GPS Reference Clock Antennas and Accessories

Jam-Resistant Pole Mounting GPS Antenna and Mount T-3072
30m RG58 Cable TCX-030
50m LMR195 Cable TCX-050
100m LMR400 Cable TCX-100
Additional cable lengths available on request
GPS Surge Suppressor SPP-GPS
GPS Amplifier – 20db T-AD200-8
LF / GPS over optical fibre systems P.O.A
GPS Splitters – 2 to 32 way, compact or rack-mount P.O.A


Optional SC Series LF (Radio) Reference Clock Antennas

Ultra-High-Gain MSF (UK) Antenna SR-MXS-00
Ultra-High-Gain DCF-77 (German) Antenna SR-DXS-00
LF Radio Surge Suppressor LF-SPP




Warranty & Support

  • Industry Leading 5-Year Warranty
  • Free Unlimited Lifetime Support
  • Free Lifetime Firmware Updates

Data Sheets and User Guides

PDF Download SC Series Data Sheet and Product Comparison Chart (PDF, 404KB)
PDF Download T-3072 GPS Timing Antenna Data Sheet (PDF, 160KB)
PDF Download SR/SC Series User Guide (PDF, 1.7MB)

How To Buy Our Products

We sell directly to you!

Our products are generally available from stock and can be shipped world-wide.

Contact us for a quotation, advice or to set up an account.

We also accept credit card payments, including Visa and MasterCard.

Request a quotation

Alternatively, please feel free to contact one of our re-sellers in your region.

About TimeTools

TimeTools is a leading UK manufacturer of NTP Network Time Servers, Synchronized Time Displays and Precision Timing Equipment. Since 2002, we have been providing timing equipment to high-profile companies world-wide. Here is a selection of well-known companies who trust TimeTools for their timing requirements:

Small Selection of TimeTools Customers

See more Customer References.

See more Customer Feedback and Testimonials.

ISO9001 Accreditation

Quality and customer satisfaction  is of paramount importance to us. TimeTools is an ISO9001:2008 accredited company. ISO9001 is an internationally recognized standard for quality management.

ISO9001:2008 Registered Company

TimeTools is also a member of the CE Marking Association. An organization which facilitates us with meeting our legal obligations with regards to CE Marking and product conformity for the sale of products within the EU. It also allows us to keep up-to-date with changes in EU legislation.

TimeTools is a member of the CE Marking Association


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