1. Copyright, Valiant Communications Limited - 2006Slide 1 Updated : January, 2006 V aliant C ommunications L imited Telecom Transmission Solutions VCL-30 TM 2 Mbps E1, Drop-Insert Voice & Data Multiplexer 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 - 2006Slide 2 Product Overview Voice Telephony (FXO, FXS, E&M). Data Communication (V.35, V.24, 64Kbps Co-directional) Wireless (Cellular, Microwave Radio) Communication. Interconnecting computer terminals. Interconnecting LAN (Local Area Networks). Providing leased data lines and real-time video links to subscribers at speeds ranging from 64Kbps up to 1.024Mbps, using the "N"x64, V.35 data interface card. G.703, Co-directional, synchronous data interface @ 64Kbps. V.35, synchronous data interface @ 64Kbps."N" x 64Kbps, V.35, user configurable, synchronous data interface. The value of "N" may by configured by the user according to bandwidth requirements. V.24 / RS232, asynchronous data interface for low-speed data applications ranging from 300Bps to 19.2Kbps. BRI ISDN “U” Interface. VCL-30, E1 Voice & Data Multiplexer

3. Copyright, Valiant Communications Limited - 2006Slide 3 Product Overview iDSL (ISDN DSL) leased line interface. 10BaseT Ethernet The VCL-30 E1 Interface operates at a primary rate of 2.048 Mbits / Sec and provides a host of features Including, channel drop and insert facility over a network of VCL-30, E1 Multiplexer, for voice and Data applications. The system supports a full range of voice interfaces with user programmable speech output levels. 2 wire analog voice interface (FXO, FXS) for subscriber dial-up applications. 2 wire and 4 wire E&M interface(s) for connecting large PABX(s), or, for inter-connecting analog telephone switches. Configuring any two voice (FXS - FXS) channels to provide Hotline facility. The VCL-30 has an effective, Windows based “Network Management System", which may be used for configuring the system, subsequent remote monitoring and management of the inter-connected systems in the network. An extensive set of alarms, for easy maintenance are provided in the system. VCL-30, E1 Voice & Data Multiplexer

4. Copyright, Valiant Communications Limited - 2006Slide 4 Features Voice and Digital Data services. Any combination ("mix-n-match") of Voice and Digital Data services deployed from a single VCL-30 "Smart Shelf". Drop and Insert applications. Digital Data option may be used for internet access or video conferencing application. Wireless applications including Cellular Networks. Digital Microwave Radio. SCADA applications. Frame Relay circuit termination. Powerful Network Management System for monitoring and network control. Compliance with all relevant ITU-T (CCITT) recommendations. 3U high, compact construction. VCL-30, E1 Voice & Data Multiplexer

5. Copyright, Valiant Communications Limited - 2006Slide 5 Highlights Field upgrade possible to provide voice, data or both services. Flexibility on use of transmission medium - copper, fiber, or wireless. Choice of Interfaces for Data Applications. RS-232, PC Interface "Network Control And Management Software". Channel assignment independent of slot position in the subrack. Extensive set of alarms. Synchronization to different user selectable clock sources (User Selectable Priority Assignment). VCL-30, E1 Voice & Data Multiplexer Transmission Mediums Ordinary copper cable pairs Optical fiber cables Wireless, for deploying voice, data or video conferencing services.

6. Copyright, Valiant Communications Limited - 2006Slide 6 Applications of VCL-30 POTS (voice), digital data, or real-time video conferencing services. Junction Mux - for digital interconnection of analog exchanges. Drop & Insert applications. Wireless network applications. High-speed data ports for digital communication links providing Leased Lines access to Internet Service Provider (ISPs) with speeds ranging from 64Kbps up to 1024Kbps. (V.35 Interface) Micro-Cellular infrastructure applications for providing cell-switch connectivity. Wide area networking. Internet Access over POTS lines - All POTS interfaces operate @ 64Kbps and support V.34 (33.6Kbps download) transmission standards for analog dial-up modems. VCL-30, E1 Voice & Data Multiplexer

7. Copyright, Valiant Communications Limited - 2006Slide 7 Application Diagrams Diagrams VCL-30, E1 Voice & Data Multiplexer VCL-30 VCL-30

8. Copyright, Valiant Communications Limited - 2006Slide 8 VCL-30 E1, 2Mbps Multiplexer Twisted Cable Pair Twisted pair cable using E1 or HDSL Transport. 30 Voice & Data Channels VCL-30 Multiplexer 30 Voice & Data Channels VCL-30, E1 Voice & Data Multiplexer

9. Copyright, Valiant Communications Limited - 2006Slide 9 VCL-30 E1, 2Mbps Multiplexer Digital Microwave Radio Link 30 Voice & Data Channels 2 Mbps Digital Radio VCL-30 Multiplexer 2 Mbps Digital Radio 30 Voice & Data Channels VCL-30, E1 Voice & Data Multiplexer

10. Copyright, Valiant Communications Limited - 2006Slide 10 VCL-30 E1, 2bps Multiplexer Fiber Optic Transmission 30 Voice / Data Channel VCL-30 Multiplexer Optical Fiber 30 Voice / Data Channel Optical Interface Optical Interface VCL-30, E1 Voice & Data Multiplexer

11. Copyright, Valiant Communications Limited - 2006Slide 11 Twisted pair cable Satellite Optical Fibre Digital Radio VCL -30 Multiplexer FAX CPU Pay Phone PC Terminal PBX or Central Office/ Exchange Video or CAD System PBX or Central Office/ Exchange TERMINAL (END TO END) MULTIPLEXER VCL-30, E1 Voice & Data Multiplexer

12. Copyright, Valiant Communications Limited - 2006Slide 12 PC Terminal PBX or Central Office/ Exchange PBX or Central Office/ Exchange CPU PC Terminal VCL -30 Multiplexer PCO Video or CAD System FAX Drop Insert Application VCL-30, E1 Voice & Data Multiplexer

13. Copyright, Valiant Communications Limited - 2006Slide 13 VCL -30 Multiplexer Central Office / Switch FXO/JNC FXS / SLC FXO/JNC 2 wire exchange loop interface card FXO/SLC 2 wire subscriber loop interface card VCL-30 E1, 2Mbps Multiplexer Subscriber Loop Point to Point or Drop / Insert Application VCL-30, E1 Voice & Data Multiplexer

14. Copyright, Valiant Communications Limited - 2006Slide 14 VCL-30, with Voice & iDSL Intranet in a Drop-Insert (Add-Drop) Application Note : Two PC’s can be linked to form an Intranet by interconnecting them through iDSL links on the VCL-30 Multiplexer(s). E1 VCL-30 Mux 1 PSTN Switch PC is Connected to CPE 10/100 Base T PC is Connected to CPE 10/100 Base T PC or LAN Analog Lines VCL-30 Mux 2 VCL-30 Mux 3 E1 CPE 10/100 Base T VCL-30, E1 Voice & Data Multiplexer

15. Copyright, Valiant Communications Limited - 2006Slide 15 ISP iDSL Application iDSL Deployment VCL-30 E1 Multiplexer for 15 Subscribers CPE 10/100Base T Application 10BaseT Interface Cisco Router with E1 Interface E1 Customer # 1 Customer # 15 Internet CPE 10/100 Base T Data @ 128 Kbps 0.5 mm Twisted pair iDSL Application with CPE 10/100Base T Data @ 128 Kbps upto 5km VCL-30 Multiplexer with iDSL Interface Cards CPE 10/100 Base T VCL-30, E1 Voice & Data Multiplexer

16. Copyright, Valiant Communications Limited - 2006Slide 16 ISP iDSL Application iDSL Deployment VCL-30 E1 Multiplexer for 15 Subscribers V.35 Application @ 128 Kbps, each V.35 Desktop Modem Cisco Router with E1 Interface E1 Customer # 1 Customer # 15 Internet SOHO PC V.35 Desktop Modem V.35 @ 128 Kbps upto 5km 0.5 mm Twisted pair iDSL Application with V.35 Modems V.35 @ 128 Kbps VCL-30 Multiplexer with iDSL Cards SOHO PC V.35 Desktop Modem Small Business LAN VCL-30, E1 Voice & Data Multiplexer

17. Copyright, Valiant Communications Limited - 2006Slide 17 Power Supply Card Ring Generator Card FXS Cards Control Card 2 Control Card 1 Slot 1Slot 2Slot 3Slot 4Slot 5Slot 6Slot 7Slot 8Slot 9 Slot 10 Slot 11 Slot 12 Slot 13 Slot 14 Slot 15 Slot 16 Slot 17Slot 18Slot 19 System Composition Core System Composition: Control Card 1 Control Card 2 Power Supply Card Backplane 19-Inch Shelf Slot 1 Power Supply Card Slot 2 Ringer Card Slot 3 to 17 Voice / Data Interface Cards Slot 18 Control Card 1 Slot 19 Control Card 2 VCL-30, E1 Voice & Data Multiplexer

18. Copyright, Valiant Communications Limited - 2006Slide 18 VCL-30, E1 Voice & Data Multiplexer User Configurable Interface Card Voice Interface: POTS service from a Central Office Switch. (FXO & FXS) Hot Line (FXS - FXS). 2 Wire and 4 Wire, E&M applications. 30W, sine-wave, 86VRMS Ringer. Data Interface: V.35 (64Kbps Synchronous Data) - 2 Interfaces (Dual Port) per card. N x 64 ("N" x 64Kbps Synchronous Data - One Interface per card). G.703 (64Kbps Synchronous Data) - 2 Interfaces (Dual Port) per card. V.24 (up to 19.2Kbps Synchronous / Asynchronous Data) 2 Interfaces (Dual Port) per card. BRI ISDN “U” Interface iDSL (ISDN DSL) leased line interface. 10BaseT Ethernet

19. Copyright, Valiant Communications Limited - 2006Slide 19 Mechanical Specifications Rack MountingStandard 19 Inch. DIN Rack Height133.33mm. Depth292mm. Width 483mm. Weight7.50 Kg. Number of Interfaces2 Conformity (Electrical)G.703 Frame StructureAs per ITU (CCITT) G.704 SignalingChannel Associated Signaling PCM Sampling Rate8000 Samples / sec. Encoding LawA Law as per ITU (CCITT) Bit Rate2048 Kbps ± 50 ppm CodeHDB3 Nominal Impedance120  balanced / 75  unbalanced Technical Specifications E1 Interface VCL-30, E1 Voice & Data Multiplexer

20. Copyright, Valiant Communications Limited - 2006Slide 20 Peak Voltage of a mark For 120  Balanced interface3.0 V ± 0.3 V 75  Unbalanced interface2.37 V ± 0.237 V Peak Voltage of a space for 120  Balanced interface0 V ± 0.3 V 75  Unbalanced interface0 V ± 0.237 V Nominal Pulse Width244 ns Pulse Maskas per ITU (CCITT) Rec. G.703 Output Jitter< 0.05 UI (in the frequency range of 20Hz to 100 Khz) Permissible Attenuation6 dB at 1 MHz Return Loss at: 51.2 Khz to 102.4 Khz> 12dB 102.4 Khz to 2048 Khz> 18dB 2048Khz to 3072 Khz> 14dB Jitter ToleranceAs per ITU (CCITT) G.823 Loss and recovery of frame As per clause 3 of ITU (CCITT) G.732 alignment Loss and recovery of multiframe As per clause 5.2 of ITU (CCITT) G.732 alignment Technical Specifications VCL-30, E1 Voice & Data Multiplexer

21. Copyright, Valiant Communications Limited - 2006Slide 21 Number of Channels per Card2 Interface TypeFXO, FXS, 2W / 4W E&M Maximum Number of Channels30 Transmission performanceFully Compliant to ITU (CCITT) G.712 specification Line Impedance600 W (900 W optional) Voice Channel Frequency300Hz-3400Hz Insertion Loss-2.0dB Nominal (User adjustable in steps of 0.5 dB through Network Management Software Idle Channel Noise  -65dB Return Loss300Hz - 600Hz - 12dB 600Hz - 3400Hz - 15dB Longitudinal Balance  46dB between 300Hz to 3400Hz Ring Frequency25 Hz (20Hz, Optional) Ring Voltage40 volts RMS into a load of 5 R.E.N. with a 0.30 Erlang traffic pattern Subscriber Loop Current23mA into a subscriber loop of 1000 ohms Overload Level+3.14dBm ± 0.5dBm Battery ReversalAll channels Periodic Metering16 Khz (Optional) Dial Pulse Speed8 -12 pps 2 Wire / 4 Wire - Voice Frequency Interface(s) VCL-30, E1 Voice & Data Multiplexer

22. Copyright, Valiant Communications Limited - 2006Slide 22 G.703 @ 64kbps, Synchronous Data Interface Number of Interfaces per Card2 Maximum Number30, V.35, 64Kbits / sec. Interface ConformityTo (CCITT) Rec. G.703 ModeSynchronous, Co-directional Bit Rate64Kbps High Speed Synchronous Data Interface V.35 Number of Interfaces per Card2 Maximum Number30, V.35, 64 Kbits / sec. Interface ConformityTo (CCITT) Rec. V.35 ModeSynchronous Bit Rate64 kbps User InterfaceDCE or DTE - User Configurable VCL-30, E1 Voice & Data Multiplexer

23. Copyright, Valiant Communications Limited - 2006Slide 23 High Speed Synchronous Data Interface “n X 64” Number of Interfaces per Card 1, (”N” x 64KBits / sec. per Card) Maximum Number(”N” x 64 Kbits / sec. Interface maximum value of “N” = 16) ConformityTo(CCITT) Rec. V.35 ModeSynchronous Bit Rate64 Kbps User InterfaceDCE or DTE - User Configurable Low Speed Data Interface V.24 Number of Interfaces per Card2 Maximum Number30 ConformityTo(CCITT) Rec. V.24 ModeSynchronous / Asynchronous Bit Rate2.4 / 4.8 / 7.2 / 9.6 / 19.2 Kbps User InterfaceDCE or DTE - User Configurable VCL-30, E1 Voice & Data Multiplexer

24. Copyright, Valiant Communications Limited - 2006Slide 24 Protection Central Office Terminal and Remote Terminal are protected against power surges and transients occurring from lightning and electric induction as per CCITT Rec. Table I/K-20 towards line side Environmental Exchange Terminal0°C to + 50°C, 90% R.H. (Non Condensing) Subscriber Terminal-10°C to +60°C, 90% R.H. (Non Condensing) VCL-30, E1 Voice & Data Multiplexer Clock Synchronization Synchronization SourcesInternal Clock, External Clock, timing derived from incoming HDB3 links (Loop Timed) External Clock InputAs per ITU (CCITT) Rec. G.703 Impedance of External Clock Input Port120  balanced Default OptionInternal Clock

25. Copyright, Valiant Communications Limited - 2006Slide 25 VCL-30, E1 Voice & Data Multiplexer Power Supply Input DC voltage-48V DC ( nominal ) Range of input-40V to -60V DC Output voltages+5V, -5V, filtered -48V ( for term. cards) Full Load Output Current4A at +5V, 0.5A at -5V Input Voltage Reversal ProtectionProvided in the Card Over Current Protection6A for +5V, 0.5A for -5V Short Circuit ProtectionCurrent limit - 6A. Recovers on removal of short Under Voltage< 4.5V Over Voltage5.4V to 5.6V Efficiency at full load>70% Ripple at full load<5mVrms Spike at full load<50mV Power Consumption21W - with all 30 Voice Circuits 42W (Worst - Case) - all data circuits.

26. Copyright, Valiant Communications Limited - 2006Slide 26 Valiant’s Products Digital Access Cross Connects - E1 / T1, E3, DS3, 10/100 BaseT Ethernet Groomers (Hi-Z Non-intrusive Hi-Impedance Monitoring) 1+1 APS (Automatic Protection Switching) Echo Canceller & Voice Quality Enhancement Solutions - E1, T1, DS3 and STM-1 E1 Drop-Insert (Add-Drop) Voice and Data Multiplexers E1, T1, E3, DS3, Ethernet Converters STM-1 Add Drop Multiplexer with Ethernet GSM Gateways - E1/T1 E1 PRI ISDN (Euro ISDN) Q.931 Multiplexers Channel Banks E2 (4 E1), 2/34 Mbps PDH Multiplexer, 34 Mbps OLTE Remote Site Monitoring Equipment VCL-30, E1 Voice & Data Multiplexer

27. Copyright, Valiant Communications Limited - 2006Slide 27 Thank you for your attention For more details visit us at our Website at http://www.valiantcom.com VCL-30, E1 Voice & Data Multiplexer 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