1. Slide 1Copyright : Valiant Communications Limited - 2007 V aliant C ommunications L imited Telecom Transmission Solutions Updated : March, 2007 16 Port E1 VCL-MegaConnect-Jr. Digital Access Cross Connect Switch (DACS) 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. Slide 2Copyright : Valiant Communications Limited - 2007 Product Overview The 16 Ports E1 Digital Access Cross Connect Switch, which presents its user an easy to use, yet a sophisticated platform to cross connect up to 16 E1 Ports Offers full cross-connect functionality to cross connect, and/or aggregate DS-0s, "n"x64Kbps consecutive data channels and, fractional E1 channels to full E1 channels Unidirectional and Bidirectional Monitoring Non-Intrusive Monitoring Application/Combine traffic from partially-utilized facilities into a single fully-utilized E1 Occupies only a 2U high rack-space 19-inch stand-alone unit provides connectivity of up to 16 E1 ports Units operates on a -48V DC input power-supply (AC input adapter is optional). E1 Digital Access Cross Connect Switch VCL- VCL-MegaConnect-Jr. E1 DACS

3. Slide 3Copyright : Valiant Communications Limited - 2007 ISP providing fractional E1s to subscribers Data aggregating fractional E1 data circuits Monitoring and Billing-Non-Intrusive Line Traffic Monitoring for “Listen-Only” and billing applications Cellular extending fractional E1 ports from MTSO to cell-sites. Application Highlights Remote TCP/IP access for configuration and monitoring Text based user friendly CLI for easy configuration Telnet option Available in 16 E1 ports configuration VCL- VCL-MegaConnect-Jr. E1 DACS

4. Slide 4Copyright : Valiant Communications Limited - 2007 Provides DS0, "n"x64Kbps and fractional E1 grooming for up to 16 E1 ports Rear access User friendly CLI (text based) commands Telnet (10/100 BaseT) option Easy to install Configurable from 2, E1 ports to 16, E1 ports depending on user requirements LED Indications on the front panel for alarms and status. Features Benefits Reduce access costs by combining partially loaded E1s to a single E1 Rear access wiring. Improves wiring and cable management Support Nx64kbps fractional E1 operation and grooming Can be ordered for (non-Intrusive) connecting to monitoring/billing equipment for Live-Traffic monitoring and cross connect functions Easy to install and simple to use. VCL- VCL-MegaConnect-Jr. E1 DACS

5. Slide 5Copyright : Valiant Communications Limited - 2007 Applications VCL- VCL-MegaConnect-Jr. E1 DACS

6. Slide 6Copyright : Valiant Communications Limited - 2007 VCL- VCL-MegaConnect-Jr. E1 DACS

7. Slide 7Copyright : Valiant Communications Limited - 2007 To monitor an E1 link in a single direction, you will need to connect ONE high impedence E1, RX pair of the DACS, as it is only the Rx (Receive) pair that is capable of listening. Please leave the Tx (TRANSMIT) pair un-connected. VCL- VCL-MegaConnect-Jr. E1 DACS

8. Slide 8Copyright : Valiant Communications Limited - 2007 To monitor an E1 link in both directions, you will need to connect TWO high impedence E1, RX pairs of the DACS, i.e. use 1, Hi-Z E1 ports. VCL- VCL-MegaConnect-Jr. E1 DACS

9. Slide 9Copyright : Valiant Communications Limited - 2007 DACS - VCL-MegaConnect Jr. - Shelf Description 16 Port E1 DACS - VCL-MegaConnect Jr. - Shelf Description The 16 Port E1 DACS - VCL-MegaConnect Jr. unit is a 2U, 19 Inch Shelf, fitted with a backplane that provides rear access of all external interfaces. The 2Mbps electrical I/O, power input, alarm extension and the NMS port are all accessed from the backplane. The 2Mbps, E1 Interfaces are 120 Ohms twisted pair RJ-45 connectors. 75 Ohms E1 Option available. VCL- VCL-MegaConnect-Jr. E1 DACS

10. Slide 10Copyright : Valiant Communications Limited - 2007 Technical Specifications E1 Interface Line RateE1 (2.048 Mbps) Available Time-Slots1-31 Conformity G. 703 PCM sampling rate 8000 samples/sec Encoding law A law as per CCITT G.711 Bit rate 2048kbps ± 50ppm Code HDB3 Nominal Impedance 120  balanced/75  unbalanced Framing G.704 Electrical G.703 Jitter G.823 Peak Voltage of a mark For 120  balanced Interface 3.0 V + 0.3 V For 75  unbalanced Interface 2.37 V + 0.237 V VCL- VCL-MegaConnect-Jr. E1 DACS

11. Slide 11Copyright : Valiant Communications Limited - 2007 Time - slot selection ANY-TO-ANY through an internal, best byte, non-blocking TSI Switch Clock Internal(Stratum3 level) Loop-Timed External75 Ohms - 2.048MHz - 1.544MHz Technical Specifications E1 Interface Connector RJ-45 (F) for 120  Impedance and BNC for 75  Impedance Peak Voltage of a space For 120  balanced Interface 0 V + 0.3 V For 75  unbalanced Interface 0 V + 0.237 V Nominal Pulse Width 244ns Pulse Mask As per CCITT rec. G.703 VCL- VCL-MegaConnect-Jr. E1 DACS

12. Slide 12Copyright : Valiant Communications Limited - 2007 Management and Control Serial Management Port (RS232)-COM Port 10/100 BaseT for Remote Management over a LAN 10/100 BaseT Telnet over a TCP-IP Network. Command Language Command Line Interface (English text commands) Windows based GUI (optional). Telnet Specification and Regulation Compliance Meets CE requirements Complies with FCC, Part 68 and Part 15 subpart A specifications Safety - UL 1459 Issue 2. VCL- VCL-MegaConnect-Jr. E1 DACS

13. Slide 13Copyright : Valiant Communications Limited - 2007 Alarm Contact Closures 1 Alarm Relay Type - Form "C" relay Temperature Operating0 0 C to 50 0 C Humidity 5% to 95% Non-condensing Power Consumption Power Consumption18 Watt Mechanical Specification Width:480mm Height:90mm Depth:280mm Weight:4.20Kg. VCL- VCL-MegaConnect-Jr. E1 DACS

14. Slide 14Copyright : Valiant Communications Limited - 2007 Alarm Status Monitoring Loss of incoming Signal at all 2Mbps ports Configuration Error Alarm In addition to the above monitoring facilities, VCL-DACS is provided with LED's, which indicate various fault conditions Monitoring 16 Port E1 DACS - VCL-MegaConnect-Jr. via LED indications 1 to 16 E1 Ports LED indicators +3V DC present -48V DC present Configuration Error VCL- VCL-MegaConnect-Jr. E1 DACS

15. Slide 15Copyright : Valiant Communications Limited - 2007 Valiant’s Products VCL- VCL-MegaConnect-Jr. E1 DACS Digital Access Cross Connects - E1/T1, E3, DS3,10/100BaseT Ethernet Groomers for Hi-Z Non-Intrusive Hi-Impedance Monitoring - E1, T1, STM-1 Echo Cancellers & Voice Quality Enhancement Solutions - E1, T1, DS3 and STM-1 STM-1, STM-4 and STM-16 ADM SDH Multiplexers E1 Drop-Insert (Add-Drop) Voice and Data Multiplexers Ethernet Converters: E1, T1, E3, DS3, STM-1 (Ethernet over STM-1) E1 / T1 TDM over IP E1 PRI ISDN (Euro ISDN) Q.931 Multiplexers E1 Channel Banks E2 (4E1), 2/34 Mbps PDH Multiplexer, 34Mbps OLTE 1+1 APS (Automatic Protection Switching) Remote Site Monitoring Equipment

16. Slide 16Copyright : Valiant Communications Limited - 2007 Thank you for your attention For more details visit us at our Website at http://www.valiantcom.com VCL- VCL-MegaConnect-Jr. E1 DACS 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