Care Alarm Sysytems
RTD has developed software for two very different Care Alarm systems.
One system focused on incoming data processing and was based on a UNIX PC containing
an AT&T DSP chip and networked to a number of Unix workstations.
The other system focused more on the operator interface and used a commercial
PC telephony card networked to Windows workstations.
RTD designed and developed the software for the central control module
of a feature telephone system that enabled secure transmission of voice and data
with full error correction. The module interfaced to a
number of synchronous and asynchronous channels and a Texas Instruments DSP
RTD developed the test vectors for implementations of the Voice Activity
Detector for the Enhanced Full Rate GSM standard. This included development of
test software with flexible reporting capability.
Telephone Billing System
RTD designed and developed a databae system for telephone billing analysis. Thanks to
RTD's real-time software expertise, the system
was an order of magnitude faster that the client's previous system running on the same hardware.
RTD developed a DSP system to increase the near-range accuracy of a
hydrographic side-scan sonar system.
A supplier of prime-rate telephony systems wished to move their interface from DOS
to UNIX. RTD designed and developed a fast and secure networked system which was
compatible with all the older systems and provided capabilities for further
Access Control System
RTD did the initial hardware design and then developed the software for a door controller module that
accepted swipe cards, contactless cards and PIN entry. The module completely eliminated the very noticeable
delay in activating the lock that was present in the system it replaced. RTD then wrote a flexible, extensible
operator and manager interface for the system.
A firm of Chartered Surveyors required a networking system which would allow
secure transfer of data within their main site and between two remote sites. RTD
specified and installed the entire network, provided some management software
and carried out staff training.