Since 1994 DSPG has been actively involved in all aspects of Text and Voice communication for Deaf and Hard of Hearing people. Jointly with BT Laboratories DSPG developed the first worldwide successful implementation of the ITU-T V.18 Recommendation that was implemented in a number of products starting from simple V.18 modems up to full implementation of National Relay Service deployed in countries such as Australia, New Zeland, United Kingdom, USA, New Zealand, Spain and Switzerland.

Since 2000 DSPG has provided BT with textphones branded as the “BT Textphone”. DSPG continues supply of these textphones to BT. The DSPG’s branded version TextLink 9100 and Texlink 9100 Mobile are sold worldwide including New Zealand, Australia, USA, Spain and other countries worldwide.

DSPG also introduced a edge-cutting product in 2000 branded as “TexBox ISDN” for text and voice access to both small and large organisations. The various models of TexBox have been successfully deployed in a significant numbers of local authorities, emergency services, police, national health service, utility companies and others.