1. Copyright, Valiant Communications Limited 2000-2005 VCL-TRLD, Thin Route DCME Voice Compression Equipment Confidential Slide 1 V aliant C ommunications L imited Telecom Transmission Solutions Updated : January, 2005 U.K. Valiant Communications (UK) Ltd 1, Acton Hill Mews, 310-328 Uxbridge Road, London W3 9QN, United Kingdom E-mail: gb@valiantcom.com Website: http://www.valiantcom.com INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi - 110015, India Phone: +91-11 4105 5601, 91-11 4105 5602 Fax: +91-11 4105 5604, 91-11 2543 4300 E-mail: getinfo@valiantcom.com Website: http://www.valiantcom.com U.S.A. Valcomm Technologies Inc. 4000 Ponce de Leon, Suite 470 Coral Gables, FL 33146 United States of America E-mail: us@valiantcom.com Website: http://www.valiantcom.com

2. Copyright, Valiant Communications Limited 2000-2005 Thin Route DCME "Thin Route" Voice Compression Equipment Provides “Toll-Quality” voice telephony channels for "thin route" (low density) applications. The VCL-TRLD is available in two versions. The first version provides a Single, Toll Quality voice channel @ 9.6Kbps for transmission over a standard RS232 (asynchronous) data interface. The second version provides Six, Toll Quality voice channels on a single, 64Kbps, synchronous channel (single time-slot). Product Overview Confidential Slide 2

3. Copyright, Valiant Communications Limited 2000-2005 Mean Opinion Score:MOS 4.0 3.5 3.0 2.5 2.0 1.5 1.0 PERFORMANCE Confidential Slide 3 Thin Route DCME GeneralBusiness Infrastructure RuralLong distance telephonyCivil Engineering Distance LearningTelcosOffshore Oil Rigs Disaster Relief Wireless NetworksProduction FarmingScalable Call Centers Pipelines TourismRetail OutletsWater Works Applications

4. Copyright, Valiant Communications Limited 2000-2005 FEATURES HIGHLIGHTS Modular Architecture Scalable - build as you grow. Transports voice over point-to-point satellite data links, dedicated limited bandwidth data channels, IP networks (optional additional hardware required). 3U high, compact construction - 12 voice compression channels per shelf. 6:1 Compression Ratio One "Toll-Quality" voice channel over RS232, 9.6Kbps (asynchronous) link. Six "Toll-Quality" voice channels over a synchronous 64Kbps (single time-slot) channel. Advanced, DSP based Vertibi Decoder for superior voice quality. Distributed (independent) power-supplies for maximum redundancy. Confidential Slide 4 Thin Route DCME

5. Copyright, Valiant Communications Limited 2000-2005 VSAT Thin Route Telephony, Remote Access - Link FXS - FXO Telco Switch PSTN PBX VCL-TRLD Satellite FXS 1 Voice Channel @ 9.6kbps (Asynchronous Rs232) or 6 Voice channels @ 64kbps (Synchronous) or 12 Voice channels @ 128kbps (Synchronous) Medium may be satellite (VSAT) or 9.6kbps (RS232) datalink Confidential Slide 5 Thin Route DCME

6. Copyright, Valiant Communications Limited 2000-2005 Thin Route Telephony, Point to Point VF Link for Hot-Line Access FXS - FXS VSAT Satellite Voice Channel @ 9.6kbps (Asynchronous Rs232) or 6 Voice channels @ 64kbps (Synchronous) Network medium can be satellite (VSAT) or 64kbps (Single Twest) datalink Confidential Slide 6 FXS VCL-TRLD Thin Route DCME

7. Copyright, Valiant Communications Limited 2000-2005 6 Compressed Voice Channels @ 64Kbps ( single time-slot ) 6 Compressed Voice Channels @ 64Kbps ( single time-slot ) BTS Telco Switch PSTN PBX BTS Telco Switch PSTN PBX Cellular, Thin Route, Prepaid Calling Card, Call Center applications E&M - E&M VCL-30 E1, CAS R2 6, VF Channels E&M Interface 6, VF Channels E&M Interface VCL-TRLD Network Medium Confidential Slide 7 Thin Route DCME

8. Copyright, Valiant Communications Limited 2000-2005 Front View of VCL-TRLD From Left to Right Confidential Slide 8 Thin Route DCME

9. Copyright, Valiant Communications Limited 2000-2005 Exchange / Switch Application for Standard POTS Service (FXO- FXS) FXO VCL-TRLD 6 VF, FXO Channels G.703 Subrate Mux 6 X 9.6Kbps Compressed VF Network Tx / Rx SITE - A 64Kbps Data Link Confidential Slide 9 Thin Route DCME

10. Copyright, Valiant Communications Limited 2000-2005 FXS VCL-TRLD G.703 Subrate Mux 6 X 9.6Kbps Compressed VF Network Tx / Rx 64Kbps Data Link SITE - B Figure # 1 Confidential Slide 10 Application for Standard POTS Service (FXO- FXS) 6, VF Channels Thin Route DCME

11. Copyright, Valiant Communications Limited 2000-2005 For Application of Hotline (Ring-Down) Service (FXS - FXS) FXS VCL-TRLD G.703 Subrate Mux 6 X 9.6Kbps Compressed VF Network Tx / Rx 64Kbps Data Link 6, VF Channel SITE - A Confidential Slide 11 Thin Route DCME

12. Copyright, Valiant Communications Limited 2000-2005 FXS VCL-TRLD G.703 Subrate Mux 6 X 9.6Kbps Compressed VF Network Tx / Rx 64Kbps Data Link Figure # 2 SITE - B Confidential Slide 12 For Application of Hotline (Ring-Down) Service (FXS - FXS) 6, VF Channels Thin Route DCME

13. Copyright, Valiant Communications Limited 2000-2005 For Application of 2 Wire / 4 Wire E&M Trunks (E&M - E&M) Exchange / Switch E&M VCL-TRLD 6, E&M Channels G.703 Subrate Mux 6 X 9.6Kbps Compressed VF Network Tx / Rx SITE - A Confidential Slide 13 64 Kbps Data Link Thin Route DCME

14. Copyright, Valiant Communications Limited 2000-2005 Exchange / Switch E&M VCL-TRLD 6, E&M Channels G.703 Subrate Mux 6 X 9.6Kbps Compressed VF Network Tx / Rx SITE - B Figure # 3 Confidential Slide 14 For Application of 2 Wire / 4 Wire E&M Trunks (E&M - E&M) 64 Kbps Data Link Thin Route DCME

15. Copyright, Valiant Communications Limited 2000-2005 Thin Route, DCME SLC / FXS Interface Module Valiant Part #VCL-TR-025 Specifications - Analog Interface (Uncompressed Input) Transmission PerformanceMOS 3.8 Exceeds G.726 @ 32Kbps, G.729 @ 8Kbps and GSM @ 13Kbps Number per card1 Maximum number of Cards / Shelf12 Insertion loss (Nominal)2dB User selectable range for insertion loss1dB to 7dB (Through Dip Switch) Input level minimum-11dB Input level maximum3.2dB Operating voltage-48V dc (Nominal) Line Impedance600ohms 900ohms (Optional on request) Idle Channel Noise  65dB Overload Level+3.14dBm  0.5dB Maximum Loop resistance1200 ohms Ring voltage75Vrms / 86Vrms Ring frequency17Hz / 20Hz / 25Hz / 50Hz Dial pulse speed10pps Confidential Slide 15 Thin Route DCME

16. Copyright, Valiant Communications Limited 2000-2005 Specifications - Digital Interface (Compressed Voice) Number per Card1 Maximum No. of Slots / Shelf12 TypeRS 232 Tx, Rx, Gnd ModeAsynchronous Baud Rate9.6 kbps - Fixed Data Size8bits ParityNone Flow Control None ( Xon / X off ) Stop Bit1 Confidential Slide 16 Thin Route DCME

17. Copyright, Valiant Communications Limited 2000-2005 Thin Route, DCME JNC / FXO Interface Module Valiant Part #VCL-TR-030 Specifications - Analog Interface (Uncompressed Input) Transmission PerformanceMOS 3.8 Exceeds G.726 @ 32Kbps, G.729 @ 8Kbps and GSM @ 13Kbps Number per card1 Maximum number of Cards / Shelf12 Insertion loss (Nominal)2dB User selectable range for insertion loss1dB to 7dB (Through Dip Switch) Input level minimum-11dB Input level maximum3.2dB Operating voltage-48V dc (Nominal) Open loop resistance>22 K ohm Closed loop resistanceConstant current sink of 23mA Line Impedance600ohms 900ohms (Optional on request) Idle Channel Noise  65dB Overload Level+3.14dBm   0.5dB Ring voltage detection (min)35Vrms Dial pulse speed10pps Confidential Slide 17 Thin Route DCME

18. Copyright, Valiant Communications Limited 2000-2005 Specifications - Digital Interface (Compressed Voice) Number per Card1 Maximum No. of Slots / Shelf12 TypeRS 232 Tx, Rx, Gnd ModeAsynchronous Baud Rate9.6 kbps - Fixed Data Size8bits ParityNone Flow Control None ( Xon / X off ) Stop Bit1 Confidential Slide 18 Thin Route DCME

19. Copyright, Valiant Communications Limited 2000-2005 Thin Route, DCME, 2 Wire / 4 Wire E&M Trunk Interface Module Valiant Part #VCL-TR-035 Specifications - Analog Interface (Uncompressed Input) Transmission PerformanceMOS 3.8 Exceeds G.726 @ 32Kbps, G.729 @ 8Kbps and GSM @ 13Kbps Number per card1 Maximum number of Cards / Shelf12 Performance Characteristics: Between voice frequency portsas per CCITT G.713 Insertion loss (Nominal)2dB Line Impedance600ohms 900ohms (Optional on request) Idle Channel Noise  65dB Overload Level+3.14dBm   0.5dB User selectable range for insertion loss1dB to 7dB (Through Dip Switch) Input level minimum-11dB Input level maximum3.2dB Confidential Slide 19 Thin Route DCME

20. Copyright, Valiant Communications Limited 2000-2005 Specifications - Digital Interface (Compressed Voice) Number per Card1 Maximum No. of Slots / Shelf12 TypeRS 232 Tx, Rx, Gnd ModeAsynchronous Baud Rate9.6 kbps - Fixed Data Size8bits ParityNone Flow Control None ( Xon / X off ) Stop Bit1 Confidential Slide 20 Thin Route DCME

21. Copyright, Valiant Communications Limited 2000-2005 Confidential Slide 21 VCL Products E1, Voice & Data Drop-Insert Multiplexer PRI ISDN (Q.931) Multiplexers E1 Intelligent Channel Banks E1 / T1 DCME (Digital Circuit Multiplication Equipment) - Voice Compression Equipment Thin Route DCME E1 / T1 Echo Cancellers E1 / T1 Digital Cross Connect T1 / E1 Converters E3, 34Mbps Multiplexer 34Mbps Optical Line Transmission Equipment (OLTE) Digital Loop Carrier Remote Asset Management Systems STM-1 / STM-4 SDH Equipment

22. Copyright, Valiant Communications Limited 2000-2005 Thank you for your attention For more details visit us at our Website at http://www.valiantcom.com U.K. Valiant Communications (UK) Ltd 1, Acton Hill Mews, 310-328 Uxbridge Road, London W3 9QN, United Kingdom E-mail: gb@valiantcom.com Website: http://www.valiantcom.com INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi - 110015, India Phone: +91-11 4105 5601, 91-11 4105 5602 Fax: +91-11 4105 5604, 91-11 2543 4300 E-mail: getinfo@valiantcom.com Website: http://www.valiantcom.com U.S.A. Valcomm Technologies Inc. 4000 Ponce de Leon, Suite 470 Coral Gables, FL 33146 United States of America E-mail: us@valiantcom.com Website: http://www.valiantcom.com