TEFONIX International Co. Ltd. INTERNATIONAL Company Profile Carrie Tsung May 31, 2006

INTERNATIONAL About Us  Headquarter located in Taiwan  Dedicated in thyristors that apply in power-handling and surge protection.  SIDAC (silicon bilateral voltage triggered switch) performs better power-handling function.  SPD (Surge Protective Device), or called OVP: (OverVoltage Protector) to maintain better surge protection ability.

INTERNATIONAL Product-SIDAC Features Symmetrical characteristics Designed for direct interface with AC circuit Glass-passivated junctions insure reliable operation High pulse current capability Surface-mount or Axial lead packages Main Applications Pulse generating circuits AC switching circuits Overvoltage protection circuits --Silicon bilateral voltage triggered switch with greater power-handling capabilities--

INTERNATIONAL Product-SIDAC Reference Application --Silicon bilateral voltage triggered switch with greater power-handling capabilities-- Basic Sidac Circuit Typical High Pressure Sodium Lamp Firing Circuit

INTERNATIONAL Product-SIDAC Reference Application --Silicon bilateral voltage triggered switch with greater power-handling capabilities-- Ignitor Circuit (Low Voltage Input) Ignitor Circuit (Low Voltage Input) Xenon Lamp Flashing Circuit Xenon Lamp Flashing Circuit

INTERNATIONAL Product-SIDAC Reference Application --Silicon bilateral voltage triggered switch with greater power-handling capabilities-- Relaxation Oscillator Using a Sidac

INTERNATIONAL Product-SPD/OVP Features Bidirectional crowbar protection High repetitive surge capability Low capacitance Low leakage current Fast response time Surface-mount outline or Axial lead packages Main Applications Customer Premises Equipment (CPE) such as phone, modems and caller ID adjunct boxes T-1/E-1, ISDN, xDSL and VoIP transmission equipment Data lines and security systems Primary protection including main distribution frames, building entrance equipment and station protection modules --Surge Protective Device/ Telecommunication Overvoltage Protector--

INTERNATIONAL Product-SPD/OVP Reference Application --Surge Protective Device / Telecommunication Overvoltage Protector-- Basic CPE Protection ADSL Protection

INTERNATIONAL Product-SPD/OVP Reference Application --Surge Protective Device / Telecommunication Overvoltage Protector-- Pair Gain RT Protection

INTERNATIONAL Product Plan  Currently main focus are on SIDAC and SPD/OVP lines  Future product plan - Protection components: Gas Discharge Tube (GDT), Varistor, ESD components - Protection components: Gas Discharge Tube (GDT), Varistor, ESD components. - Thyristors: Triac, SCR.

INTERNATIONAL Market Status  TVS diodes appeared in the early 80’s as the first practical semiconductor solution to surge protection.  In late 80’s and early 90’s, the SIDAC technology of thyristor products has been identified as a candidate for the primary surge protection device that telephone industry searched for.  SIDAC thyristor has found a new market needs in mid 90’s because of fast growth in Internet, multimedia, computer, auto industry and consumer electronics with surge sensitive circuitry.  Currently there are more governing agencies of health, safety, consumer and others are mandating the requirement of surge protection on all electronic equipment under Transient Immunity Standards.

INTERNATIONAL Market Status  ST Microelectronics -Started in thyristor business by buying TAG, strong in Europe. -The thyristor business occupies small share and with weaker support.  Teccor (LittelFuse) -Wholly owned subsidiary of Company “Siebe”, specializing in thyristor products. -Has been merged by LittelFuse in  ON Semi -Divested from thyristor business in 2000, focus on power management ICs now.  Bourn, Shindengen

INTERNATIONAL Recognition from Customers  Our product SPD/OVP has been used in the United States instead of Littelfuse, Teccor.  Our product SPD/OVP has been used in the United States instead of Bourn.  Our product SPD/OVP has been used in Taiwan (modem router and power protection socket).  Our product SIDAC has been used in Japan instead of Shindengen (air cleaner).  Our product SIDAC has been used in Malaysia instead of Shindengen (lamp).  Our product SIDAC has been used in Taiwan (air cleaner and igniter).

INTERNATIONAL Benefits from Tefonix  Better price-performance than other brands in the market.  Offer Compatible Solutions as Major Brands in the market.  Experienced Team in IT Field More Than Ten Year.  Offer Flexible Production.  Provide Tailor-made Service.  Provide Prompt Response.

INTERNATIONAL Thank You! Thank You! TEFONIX International Co. Ltd.