Technical Data And Troubleshooting - Telos TWOx12 User Manual

8

Technical Data and Troubleshooting

8.1 Overview
A consequence of modern surface-mount construction is that it is frequently no longer
possible for local repairs to be made. Special and expensive equipment is required to change
parts. As well, today's equipment is very complicated and requires repair technicians to have
detailed experience and training, and have access to high-end test equipment.
At the same time, the advent of overnight delivery services means that equipment can be
returned to the factory for quick turn-around repair. Therefore, we do not expect you to fix
this unit at the component level, and we do not include schematics of the unit in the manual.
Please see page III of this manual for proper procedures on returning units for repair.
There is the possibility, however, that you could repair the unit by swapping subsystems such
as plug-in modules or power supplies. The Telos customer support crew is standing-by to
assist with this, if you need it.
8.2 System Software & Firmware
Viewing Version Information
To assist with troubleshooting, Telos customer support may ask you to provide some
software version numbers. There are two major software components to the system:
•
System software – This is the software that can be updated by downloading new
software or changing the SIMM in the socket on the motherboard.
•
Firmware – This code is analogous to a bootstrap loader and contains certain critical
information about the unit. This information can only be updated or changed at the
factory. It is stored in a partition of the non-volatile memory on the motherboard.
While there were a few changes to the firmware early on in the life of the TWOx12,
the firmware is now stable and further changes are unlikely.
The system software affects the ISDN procedures, the user interface, general operation, and
audio processing functions.
The software version, and software build date can be determined from the start-up screen.
CHAPTER 8
TELOS TWOX12 USER'S MANUAL
Twox12
VX.X.
TELOS SYSTEMS yyyy-mm-dd
TECHNICAL DATA & TROUBLESHOOTING
Software Version
Software Build Date
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