TETRA Handset Production Commences

SOFTWARE RADIO TECHNOLOGY PLC                         

                  TETRA Handset Production Commences in China                  

The Directors of Software Radio Technology plc ("SRT" or the "Company") are
pleased to announce that TCB has commenced commercial production of its TETRA
handset and begun paying royalties to SRT.

TCB is the first company in China and Asia to commence production and
commercial sales of a locally designed, developed and manufactured TETRA
handset.

TCB is a large, well known company in China with nearly 70 years' experience of
supplying professional markets with a variety of communications equipment. TCB
has combined its trusted local reputation and presence with the advantage of a
locally designed, developed and manufactured product to enter the rapidly
growing China TETRA market. For the first time, Chinese buyers can purchase
handsets from a local manufacturer.

Since entering a joint TETRA technology licence and development agreement in
2004, TCB and SRT have worked closely together to develop the handset which has
undergone extensive field trials with a range of customers to ensure and prove
reliability and suitability for the specific needs of the local market.

The handset offers a complete range of advanced TETRA voice and data features
and a performance and quality standard equal to handsets manufactured in
Europe.

TETRA networks are actively being rolled out across China and will be used for
a variety of communications from police to railway workers as well as
prestigious events such as the Olympics. TCB is already working closely with
customers in many of these market segments.

Mr Ma Yan, Vice President of TCB said: "TCB has always focused on developing
and manufacturing equipment for professional markets across China. Our position
in the local market and growth of TETRA created an opportunity for us if we had
our own TETRA handset. The co-operation with SRT has enabled us to develop and
manufacture our own handset with various customised features and functions for
our target users. We have worked hard and made a considerable investment in the
development of this handset and we are proud to be the first local company to
launch its own handset. The China market is large and we are optimistic that we
will win a share of this with our own handset in the future now that production
has commenced. We look forward to continuing to work more closely with SRT in
the future."

Simon Tucker, Group Managing Director of SRT said: "TCB is a long term partner
for SRT and the commencement of local production of such a sophisticated
product is an important milestone for us and TCB: until today only EU companies
produced and sold TETRA handsets. We believe that TCB is well positioned to
take advantage of the rapidly growing China and Asian TETRA markets and
therefore look forward to a steady ramp-up in production. We look forward to
continuing to work closely with TCB on further technology and product
developments as part of our long term licence agreement.'

Enquiries:                                                                     
                                                                               
Software Radio Technology plc                                      01761 409500
Simon Tucker                                                                   
Group Managing Director                                                        
                                                                               
Hanson Westhouse Limited                                          0113 246 2610
Tim Feather                                                                    
Matthew Johnson                                                                

CityRoad Communications                                            07947 186694
Paul Quade                                                                     

About SRT:

Founded in 1987 and quoted on AIM in 2005, SRT focuses on the development of
turnkey technology product solutions for homeland security applications. SRT's
technologies are used by manufacturers to fast track and de-risk the
development of their own products. SRT operates two divisions. SRT Marine
Technology which focuses on maritime identification and tracking systems, such
as AIS. SRT PMR Technology which focuses on the areas of professional voice and
data radio communications such as TETRA. www.softwarerad.com

About TCB:

Tianjin Communication & Broadcasting Group Corporation Ltd ("TCB") is a large,
China based company which specialises in the development, production and sale
of products for professional markets within China. The company was founded in
1937 and has regularly achieved recognition for its various activities. As well
as developing and manufacturing its own products for sale locally, TCB also
undertakes contract manufacturing services for various companies around the
world. www.tcb.com.cn