Is there a way to monitor the device to make sure its still receiving signal and time updates?

The TM1000A does not have any support for SNMP or any other type of direct monitoring. A script could be setup somewhere that is periodically checking time and looking at the return value of the lookup. If the TM1000A loses its GPS signal, it will return several error flags and the Stratum level will change from 1 to 15. From that return value you could generate a notification.The unit supports configuration through a web page interface. A quick login can tell you if its running (can you log in) and the web page displays the GPS lock status and signal strengths of the top 3 sats. There is an internal HW watchdog on the unit and if the software stops servicing the watchdog, it reboots itself. As long as the GPS signal strength, based on antenna location, is good, these units are very reliable.

what is the oscillator and accuracy if the signal from GPS is interrupted?

This product doesn't serve time if GPS lock is lost. Our TM2000A product does. Specifics of its capabilities can be found on the manufacturers website.

How long is the antenna/receiver cable? What type of connector? Server is in the middle of the building, doubt GPS penetrates well enough.

Cable: RG174, 5m length, SMA male. Antenna is magnetic. Find a phone with GPS, if the GPS on the phone works there is a good chance the antenna will. It only has to be connected to the network as long as the clients can query the device it does not matter where it is located. Manual can be downloaded at http://www.css-design.com/downloads/TM1000A_Manual.pdf

Does this support ntp authentication?

Not that I am aware of... I view this unit as an 'in-house' time reference, so why would authentication be necessary when it is totally under your control? The processor is weak and is not designed to handle large (internet size) traffic.

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⏰ Time is Money – Don’t Waste Either!

COMPLETE PACKAGE - Includes GPS patch antenna and power supply for instant functionality.
PRECISION TIMING - Experience unparalleled accuracy with Stratum 1 time synchronization.
ROBUST GPS SUPPORT - Stay in sync with U.S. satellites for reliable timekeeping.
USER FRIENDLY DESIGN - Compact and sleek black design fits perfectly in any professional environment.
SEAMLESS CONNECTIVITY - Easily integrates with your existing network for hassle-free setup.

The TimeMachines TM1000A is a cutting-edge NTP Network Time Server that utilizes GPS technology to provide Stratum 1 time accuracy. It comes complete with a GPS patch antenna and power supply, ensuring you have everything you need for precise time synchronization in your professional setting.

TimeMachines, NTP Network Time Server with GPS, TM1000A, A GPS Antenna maintains current time broadcast by U.S. Satellites

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