1. Copyright, Valiant Communications Limited - 2007Slide 1 V aliant C ommunications L imited Telecom Transmission Solutions VCL-MX TM 2Mbps E1, Drop-Insert Voice & Data Multiplexer Updated : March, 2007 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 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 INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi - 110015, India E-mail: mail@valiantcom.com Website: http://www.valiantcom.com

2. Copyright, Valiant Communications Limited - 2007Slide 2 Product Overview Provides wide range of POTS (voice) and digital data services Integrates analog communication equipment with digital E1 interface Effective CLI (text) and GUI (Graphical User Interface) based "Network Management System” Remote monitoring and management of the inter-connected systems Both Inband and Out-of-band configuration and monitoring options An extensive set of alarms, for easy maintenance are provided in the system VCL-MX, E1 Voice & Data Drop-Insert Multiplexer E1 voice and data, Drop-Insert (Add-Drop) Multiplexer

3. Copyright, Valiant Communications Limited - 2007Slide 3 The Multiplexer may be used in Terminal or Drop-Insert (Add-Drop) configuration to provide Toll Quality Voice services Interconnect LAN (Campus Network) Interconnect Computer Terminals Provide LAN-WAN Interconnectivity Provide Leased Lines on DSL for SOHO Applications VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

4. Copyright, Valiant Communications Limited - 2007Slide 4 Voice Interface Options FXO FXO - ext (gain/attenuation configurable) FXS FXS - ext (gain/attenuation configurable) E&M (2-Wire and 4-Wire) E&M - ext (gain/attenuation configurable) FXS-FXS (Hot-line) FXS-C-FXS-C (upto 15 way conference capability) VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

5. Copyright, Valiant Communications Limited - 2007Slide 5 RS232 RS485 G.703 @ 64 Kbps, co-directional IDSL @ 128 Kbps V.35, n X 64 Kbps V.36, n X 64 Kbps X.21, n X 64 Kbps RS530, n X 64 Kbps VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Data Interface Options 10BaseT-Ethernet Bridge 10BaseT-Router Analog I/O Card Digital I/O Card Universal Data Interface Card

6. Copyright, Valiant Communications Limited - 2007Slide 6 Voice and Data Drop-Insert Multiplexer without In-band Management Interface Voice Interfaces FXO FXO (ext) FXS FXS (ext) E&M E&M (ext) FXS - Hotline Data Interfaces RS232 RS485 iDSL G.703 VCL-MX (Version # 1) Available Interfaces VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

7. Copyright, Valiant Communications Limited - 2007Slide 7 VCL-MX-Version # 1 - Voice and Data Drop-Insert Multiplexer without In-band Management Interface VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

8. Copyright, Valiant Communications Limited - 2007Slide 8 Rear View 19-Inch Shelf 3U high19- Inch Shelf and Backplane VCL-MX-001 Slot 1Power Supply Card VCL-MX-010 Slot 2Ringer Card VCL-MX-040 Slot 3 to 1715 User Configurable voice & As per user requirement data interface(s) Slot 18Control Card 1 VCL-MX-015 Core System Composition Descriptions Part No. VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

9. Copyright, Valiant Communications Limited - 2007Slide 9 Voice and Data Drop-Insert Multiplexer with In-band Management Interface (75 Ohms unbalance E1 Impedance - Optional) VCL-MX (Version # 2) Available Interfaces VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Voice Interfaces FXO FXO (ext) FXS FXS (ext) E&M E&M (ext) FXS - Hotline Data Interfaces RS232 RS485 iDSL G.703

10. Copyright, Valiant Communications Limited - 2007Slide 10 VCL-MX-Version # 2 - Voice and Data Drop-Insert Multiplexer without In-band Management Interface VCL-MX, E1 Voice & Data Drop-Insert Multiplexer NMS/Telnet Management Card

11. Copyright, Valiant Communications Limited - 2007Slide 11 Rear View 19-Inch Shelf 3U high19- Inch Shelf and Backplane VCL-MX-002 Slot 1Power Supply Card VCL-MX-010 Slot 2Ringer Card VCL-MX-040 Slot 3 to 1715 User Configurable voice & As per user requirement data interface(s) Slot 18NMS/Telnet Management Card VCL-MX-NMS Slot 19Control Card 1 with In-band VCL-MX-015-2 Management Interface Core System Composition Description Part No. VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

12. Copyright, Valiant Communications Limited - 2007Slide 12 VCL-MX (Version # 3) Voice and Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options (75 Ohms unbalance E1 Impedance - Optional) Voice Interfaces FXO FXO (ext) FXS FXS (ext) E&M E&M (ext) FXS - Hotline Data Interfaces RS232 RS485 iDSL G.703 nX64 Interfaces V.35 V.36 X.21 RS530 10BaseT Fractional E1 Universal Data Interface Card Available Interfaces VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

13. Copyright, Valiant Communications Limited - 2007Slide 13 VCL-MX-Version # 3 - Voice and Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options VCL-MX, E1 Voice & Data Drop-Insert Multiplexer NMS/Telnet Management Card

14. Copyright, Valiant Communications Limited - 2007Slide 14 Rear View 19-Inch Shelf 3U high19- Inch Shelf and Backplane VCL-MX-003 Slot 1Power Supply Card VCL-MX-010 Slot 2Ringer Card VCL-MX-040 Slot 3 to 1210 User Configurable voice & As per user requirement data interface(s) Slot 13 to 164 User Configurable “n” X 64 Kbps As per user requirement interface(s) Slot 17NMS/Telnet Management Card VCL-MX-NMS Slot 18 Control Card 1 with In-band VCL-MX-015-3 Management Core System Composition Description Part No. VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

15. Copyright, Valiant Communications Limited - 2007Slide 15 VCL-MX (Version # 4) Voice and Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options (75 Ohms unbalance/120 Ohms balance E1 Impedance) Available Interfaces VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Voice Interfaces FXO FXO (ext) FXS FXS (ext) E&M E&M (ext) FXS - Hotline Data Interfaces RS232 RS485 iDSL G.703 nX64 Interfaces V.35 V.36 X.21 RS530 10BaseT Fractional E1 Analog I/O Card Universal Data Interface Card

16. Copyright, Valiant Communications Limited - 2007Slide 16 VCL-MX-Version # 4 - Voice and Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

17. Copyright, Valiant Communications Limited - 2007Slide 17 Rear View VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

18. Copyright, Valiant Communications Limited - 2007Slide 18 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer 19-Inch Shelf 3U high19- Inch Shelf and Backplane VCL-MX-004 Slot 1Power Supply Card VCL-MX-010 Slot 2Ringer Card VCL-MX-040 Slot 3 to 1715 User Configurable voice & data As per user requirement interface(s) Slot 18 Control Card 1 VCL-MX-015-4 Slot 19 Power Supply Card VCL-MX-010 Slot 20 to 22Three 64 Kbps Dual Channel CardAs per user requirement Slot 23 to 286 User Configurable “n” X 64 Kbps As per user requirement interface(s) Slot 29LAN / Telnet Management Card VCL-MX-LAN Slot 30Control Card 2 VCL-MX-020 Core System Composition Description Part No. Available Interfaces Voice and Data Interfaces from slot 3 to 17: FXO / FXS / E&M / RS232 / iDSL / G.703 Nx64 Interfaces from Slot 23 to 28: V.35 / V.36 / RS530 / X.21 / 10BaseT / Fractional E1 Framed and un-Framed / Analog I/O Card / Digital I/O Card / Universal Data Interface Card

19. Copyright, Valiant Communications Limited - 2007Slide 19 VCL-MX (Version # 5) Voice and Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options (75 Ohms unbalance/120 Ohms balance E1 Impedance) Available Interfaces VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Voice Interfaces FXO FXO (ext) FXS FXS (ext) E&M E&M (ext) FXS-Hotline FXS-C Data Interfaces RS232 RS485 iDSL G.703 nX64 Interfaces V.35 V.36 X.21 RS530 10BaseT Fractional E1 Analog I/O Card Universal Data Interface Card

20. Copyright, Valiant Communications Limited - 2007Slide 20 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer VCL-MX-Version # 5 - Voice and Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options

21. Copyright, Valiant Communications Limited - 2007Slide 21 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Rear View

22. Copyright, Valiant Communications Limited - 2007Slide 22 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer 19-Inch Shelf 3U high19- Inch Shelf and Backplane VCL-MX-004 Slot 1Power Supply Card VCL-MX-010 Slot 2Ringer Card VCL-MX-040 Slot 3 to 1715 User Configurable voice & data As per user requirement interface(s) Slot 18 Control Card (12 E1) VCL-MX-030-5 Slot 19 Power Supply Card (redundant) VCL-MX-010 Slot 20 to 22Three 64 Kbps Dual Channel CardAs per user requirement Slot 23 to 286 User Configurable “n” X 64 Kbps As per user requirement interface(s) Slot 29NMS/Telnet Management Card VCL-MX-NMS Core System Composition Description Part No. Available Interfaces Voice and Data Interfaces from slot 3 to 17: FXO / FXS / E&M / FXS-C/ RS232 / iDSL / G.703 Nx64 Interfaces from slot 20 to 25: V.35 / V.36 / RS530 / X.21 / 10BaseT / Fractional E1 Framed and un-Framed / Analog I/O Card / Digital I/O Card / Universal Data Interface Card.

23. Copyright, Valiant Communications Limited - 2007Slide 23 Features Voice and Digital Data services Any combination ("mix-n-match") of Voice and Digital Data services deployed from a single VCL-MX "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 3U (Version 1, Version 2, Version 3), 6U (Version 4 and 5) high, compact construction VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

24. Copyright, Valiant Communications Limited - 2007Slide 24 Highlights Field upgradable to provide voice, data or both services Flexibility on use of transmission medium - copper, fiber or wireless Choice of Interfaces for Data Applications RS232, PC Interface "Network Control And Management Software" In-band system configuration and management interface Out-of-band system configuration and management interface through 10BaseT Terminal (optional) Channel assignment independent of slot position in the subrack Extensive set of alarms User Selectable Internal or Loop-Timed clock options. VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

25. Copyright, Valiant Communications Limited - 2007Slide 25 Transmission Mediums Copper Optical Fiber Wireless VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

26. Copyright, Valiant Communications Limited - 2007Slide 26 Applications of VCL-MX POTS (voice), digital data or real-time video conferencing services (V.35, V.36, X.21, RS530, 10BaseT Router, 10 BaseT Ethernet Bridge) high-speed digital data interface options allows point-to-point networks solutions for providing a video conferencing channel of up to 1984 Kbps) 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 1984 Kbps digital data interface options 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) dial-up modems. VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

27. Copyright, Valiant Communications Limited - 2007Slide 27 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Applications Application # 01

28. Copyright, Valiant Communications Limited - 2007Slide 28 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Application # 02

29. Copyright, Valiant Communications Limited - 2007Slide 29 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Application # 03 Application # 04

30. Copyright, Valiant Communications Limited - 2007Slide 30 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Application # 05

31. Copyright, Valiant Communications Limited - 2007Slide 31 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Application # 06

32. Copyright, Valiant Communications Limited - 2007Slide 32 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Application # 07

33. Copyright, Valiant Communications Limited - 2007Slide 33 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Application # 08

34. Copyright, Valiant Communications Limited - 2007Slide 34 Continue... VCL-MX, E1 Voice & Data Drop-Insert Multiplexer E1 Interface (Main Link) Technical Specifications 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 Peak Voltage of a mark For 120  Balanced interface3.0 V ± 0.3 V 75  Unbalanced interface2.37 V ± 0.237 V

35. Copyright, Valiant Communications Limited - 2007Slide 35 Continued from E1 Interface (Main Link)... VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Peak Voltage of a space for 120  Balanced interface 0V ± 0.3 V 75  Unbalanced interface 0V ± 0.237 V Nominal Pulse Width 244 ns Pulse Mask As per ITU (CCITT) Rec. G.703 Output Jitter < 0.05 UI (in the frequency range of 20Hz to 100KHz) Permissible Attenuation 6 dB at 1 MHz Return Loss at 51.2 KHz to 102.4 KHz >12dB 102.4 KHz to 2048KHz >18dB 2048KHz to 3072 KHz >14dB Jitter Tolerance As per ITU (CCITT) G.823 Loss and recovery of frame alignment As per clause 3 of ITU (CCITT) G.732 Loss and recovery of multiframe alignment As per clause 5.2 of ITU (CCITT) G.732

36. Copyright, Valiant Communications Limited - 2007Slide 36 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  (900  optional) Voice Channel Frequency300Hz-3400Hz Insertion Loss-2.0dB Nominal (User adjustable) Idle Channel Noise  - 65dB Return Loss300Hz - 600Hz - 12dB, 600Hz - 3400Hz - 15dB Longitudinal Balance  46dB between 300Hz to 3400Hz Ring Frequency25Hz (20Hz, Optional) Ring Voltage  75 volts RMS into a load of 5 R.E.N. with a 0.30 Erlang traffic pattern Subscriber Loop Current  23mA into a subscriber loop of 1000 ohms Overload Level+3.14dBm ± 0.5dBm Battery ReversalAll channels Dial Pulse Speed8 -12 pps - Pulse Dialing/DTMF Dialing 2 Wire/4 Wire - Voice Frequency Interface(s) VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

37. Copyright, Valiant Communications Limited - 2007Slide 37 Low Speed Data Interface RS232 InterfaceRS232 Number of Interfaces per Card2 Maximum Number30 ConformityRS232 ModeAsynchronous Bit Rate50 Kbps to 19.2 Kbps User InterfaceDCE Character Length5 / 6 / 7 / 8 (Auto-Select) Stop Bits1 / 1.5 / 2 (Auto-Select) ParityEven / Odd / 0’s / 1’s / none (Auto-Select) VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Low Speed Data Interface RS232/485 InterfaceRS232/485 Number of Interfaces per Card2 Maximum Number30 ConformityRS232/485 Continue...

38. Copyright, Valiant Communications Limited - 2007Slide 38 G.703 @ 64kbps, Synchronous Data Interface InterfaceG.703 @ 64 Kbps Number of Interfaces per Card2 Maximum Number30, G.703, 64Kbits/sec. Interface ConformityTo (CCITT) Rec. G.703 ModeSynchronous, Co-directional Bit Rate64Kbps VCL-MX, E1 Voice & Data Drop-Insert Multiplexer ModeAsynchronous Bit Rate50 Kbps to 19.2 Kbps User InterfaceDCE Character Length5 / 6 / 7 / 8 (Auto-Select) Stop Bits1 / 1.5 / 2 (Auto-Select) ParityEven / Odd / 0’s / 1’s / none (Auto-Select) Low Speed Data Interface RS232/485

39. Copyright, Valiant Communications Limited - 2007Slide 39 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Digital I/O’s - Type I Number of Digital I/O’s per 64Kbps 8 Digital In/8 Digital Out/ time-slots/per Interface Card(Logic High/Low) Interfaces Digital Drivers (current source type) 8 Max Source current100 mA External Ref Voltage Range5 Volts to 30 Volts DC External Reference VoltageRequired Minimum Load Resistance @ 5V50R Minimum Load Resistance @ 30V300R Digital Sensor (current sink type)8 Maximum sink current30mA Voltage Range 5 Volts External Ground ReferenceRequired Description: This interface Card provides 8 digital I/O’s which may be used to either extend Digital I/O’s (logic high/low) signals between any two E1 Multiplexers, or operate switches remotely (using logic high/low) signals between any two multiplexers. Drivers / Sense Logic operates using External Voltage and Ground references). Digital I/O Interface Card (EPCB-1419)

40. Copyright, Valiant Communications Limited - 2007Slide 40 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer OR Digital I/O’s - Type Il Digital Drivers (Current sink type)8 Maximum sink current100mA Voltage Range5 Volts to 30 Volts DC External Ground Reference Required Digital Sensor (current source type)8 Maximum sink current30mA Voltage Range 5 Volts to 30 Volts DC External Ground ReferenceRequired

41. Copyright, Valiant Communications Limited - 2007Slide 41 Analog I/O Interface Card (EPCB-1420) VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Description: This interface card provides 8 Analog I/O’s which may be used to extend either Dry Relay Contacts (Relay Normally-Open or Relay Normally-Close), or operate switches remotely (using 2A Dry Relay Contacts) between any two Multiplexers using a 64 Kbps time-slot. The Dry Relay Contacts are rated at maximum 2 Amps, 30 Volts DC. Relay Specifications (Drivers) Maximum Number of Relay Ports8 Maximum Switching Power60 W Maximum Switching Voltage30V DC Maximum Switching Current2 Amps Typical Number of Operation> million Dry Contacts Sensors Maximum Number of Dry Contact Sensors8 Maximum Current30 mA Typical Current30 mA Reference Source Voltage3.3 Volts

42. Copyright, Valiant Communications Limited - 2007Slide 42 Sub-Rate Multiplexer - Optional Extra Optional: To be used with 64 Kbps G.703 co-directional data interface card. Number of Interfaces per 6 64 Kbps channel Interface TypeRS232 ModeAsynchronous Bit Rate9.6 Kbps, 8 bits 1 stop bit ParityNone BRI ISDN 2B+D "U" InterfaceMeets ANSI T1.601-1992 requirements Line Rate160 Kbits/s Frame Format2B+D as per CCITT Rec.1.430 Line Code2B1Q as per CCITT Rec.G.961 Accepted Line Attenuation42dB at 40 Khz Pulse ShapeAs per CCITT Rec.G.961 Multiplexer EmulationLT Emulation/NT Emulation (User Selectable) Impedance135 Ohms at 40KHz VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

43. Copyright, Valiant Communications Limited - 2007Slide 43 iDSL - ISDN DSL "U" InterfaceMeets ANSI T1.601-1992 requirements Line Rate160 Kbits/s Frame Format2B as per CCITT Rec.1.430 Line Code2B1Q as per CCITT Rec.G.961 Accepted Line Attenuation42dB at 40 KHz Pulse ShapeAs per CCITT Rec.G.961 Multiplexer EmulationLT Emulation Customer Premises EquipmentNT Emulation Impedance135 Ohms at 40KHz InterfaceV.35 Number of Interfaces per Card 1, (“N” x 64KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable ConformityV.35 ModeSynchronous Bit Rate64 Kbps to 1984 Kbps User InterfaceDCE High Speed Synchronous “n X 64” Data Interface Type: V.35 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

44. Copyright, Valiant Communications Limited - 2007Slide 44 InterfaceV.36 Number of Interfaces per Card 1, (“N” x 64KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable ConformityV.36 ModeSynchronous Bit Rate64 Kbps to 1984 Kbps User InterfaceDCE High Speed Synchronous “n X 64” Data Interface Type: V.36 InterfaceX.21 Number of Interfaces per Card 1, (“N” x 64KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable ConformityX.21 ModeSynchronous Bit Rate64 Kbps to 1984 Kbps User InterfaceDCE High Speed Synchronous “n X 64” Data Interface Type: X.21 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

45. Copyright, Valiant Communications Limited - 2007Slide 45 InterfaceRS530 Number of Interfaces per Card 1, (“N” x 64KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable ConformityRS530 ModeSynchronous Bit Rate64 Kbps to 1984 Kbps User InterfaceDCE High Speed Synchronous “n X 64” Data Interface Type: RS530 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer InterfaceV.35, V.36, X.21, RS422, RS530 Number of Interfaces per Card 1, (“N” x 64KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable ConformityUniversal-user Configurable as above ModeSynchronous Bit Rate64 Kbps to 1984 Kbps User InterfaceDCE/DTE Universal Data Interfaced: High Speed Synchronous “n X 64” Data Interface Type

46. Copyright, Valiant Communications Limited - 2007Slide 46 Interface10BaseT (Bridge) Number of Interfaces per Card 1, (“N” x 64KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable Conformity10BaseT Ethernet Bridge ModeSynchronous Bit Rate64 Kbps to 1984 Kbps User Interface10BaseT High Speed Synchronous “n X 64” Data Interface Type: 10BaseT Ethernet Bridge VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Timing OptionsInternal Clock, Loop-Timed Clock Synchronization SourcesInternal Clock, span clock timing derived from incoming HDB3 links (Loop Timed) Default OptionInternal Clock Clock

47. Copyright, Valiant Communications Limited - 2007Slide 47 Interface10BaseT (Router) Number of Interfaces per Card 1, (“N x 64” KBits/sec. per Card) Bandwidth(“N” x 64 Kbits/sec. Interface maximum value of “N” = 30) - User Selectable IP routingRIP-I, RIP-II, static routing, IP filters, BootP client and relay, DHCP relay IPQoSBandwidth management (CBR, VBR), Priortization (6 levels), RTP auto detection, DiffServ/TOS support Bandwidth Optimization SW Compression (optional), MLPPP and Bandwidth on Demand, Connection on Demand and IPX spoofing Interoperability PPP Supported RFCs 1058, 1213, 1315, 1332, 1334, 1389, 1471, 1472, 1473, 1474, 1490, 1493, 1519, 1542,1573, 1604, 1631, 1638, 1661, 1662, 1722, 1723, 1724, 1812, 1850, 1962, 1974, 1990 High Speed Synchronous “n X 64” Data Interface Type: 10BaseT Ethernet Router VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

48. Copyright, Valiant Communications Limited - 2007Slide 48 Management Interface Local Management Interface RS232, operating @ 9.6 Kbps CLI (text) based Interface, Hyper Terminal (VT-100 Emulation) In-band Management Interface for Remote Terminals RS232, operating @ 9.6 Kbps CLI (text) based Interface, Hyper Terminal (VT-100 Emulation) Out-of-band Management Interface - Optional 10/100 BaseT - User Assigned IP Address VCL-MX, E1 Voice & Data Drop-Insert Multiplexer Temperature and Humidity0°C to + 50°C, 90% R.H. (Non Condensing) Altitudeupto 9,000 feet Environmental Slide 44

49. Copyright, Valiant Communications Limited - 2007Slide 49 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 Current8A at +5V, 0.5A at -5V Input Voltage Reversal ProtectionProvided in the Card Over Current Protection10A for +5V, 1.0A for -5V Short Circuit ProtectionCurrent limit - 6A. Recovers on removal of short Efficiency at full load>86% Ripple at full load<5mVrms Spike at full load<50mV Power Consumption VCL-MX (Version # 1)24 watt (with all 30 Voice Circuits) VCL-MX (Version # 2)25 watt (with all 30 Voice Circuits) VCL-MX (Version # 3)25 watt (with all Voice & Data Circuits) VCL-MX (Version # 4)35 watt (with all Voice & Data Circuits) VCL-MX (Version # 5)35 watt (with all Voice & Data Circuits) VCL-MX, E1 Voice & Data Drop-Insert Multiplexer

50. Copyright, Valiant Communications Limited - 2007Slide 50 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer 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

51. Copyright, Valiant Communications Limited - 2007Slide 51 VCL-MX, E1 Voice & Data Drop-Insert Multiplexer 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 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 INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi - 110015, India E-mail: mail@valiantcom.com Website: http://www.valiantcom.com