DSPGenie M-TTY
Overview
The DSPGenie Mobile TTY Transmission Tester (MTT) was developed by DSPG to support field studies of TTY transmission over digital wireless telephones.
Based on multi-DSP based testing platform it fully emulates the operation of the TextLink 9100 MT allowing automated testing and verification of TTY over wireless networks in field conditions.
The tester can launch bi-directional scripts, which will alternate sides automatically after the GA characters. The text passes via serial connection to the TTY and then via audio connection to the handset. Incoming text is captured from the TTY by the tester.
The M-TTY connects to a host PC via USB 2.0 interface. The DSPG TTY tools application software runs entirely on a host PC under a Windows 2000/XP/Vista operating system. This software fully supports the Gallaudet test data script format and original scoring algorithm.
The M-TTY Mod-3 can operate either in an interactive manual mode or in command-based automated mode, allowing integration with the user’s testing system. Automated mode allows testing over a period of many hours with large amount of data, significantly reducing time to complete set of tests.
Tester Operation
The DSPGenie M-TTY consists of two DSP modules implementing separate Baudot/CTM soft-modems A and B. Each of the modems is fully compatible with TextLink 9100 MT.
Modem A is always used as a Calling party and Modem B is used as an Answering party.
The USB interface connects the M-TTY to the user’s laptop or desktop host PC running DSPG’s TTY tools application software.
The TTY tools DLL library provides functions and commands to allow automated operation within the user’s test environment.Additionally, these commands can be executed remotely from another computer using the TCP/IP and specific client/server protocol over the LAN.
Block diagrams below show the compatibility between testing environment using TextLink 9100 MT and DSPGenie M-TTY:
Downloads
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