1. Slide 1 Orion Telecom Networks Inc. - 2010Slide 1 Ethernet over E3 Switch xcvcxv Updated: April, 2010Orion Telecom Networks Inc. - 2010 Ethernet over E3 Switch Product Presentation

2. Slide 2 Orion Telecom Networks Inc. - 2010Slide 2 Ethernet over E3 Switch  Ethernet over E3 Switch (Ethernet to E3 Switch) packaged in a 19-inch rack-mountable chassis  Provides a 100BaseT Ethernet and 100Base-FX optical ethernet interfaces on the user side which may be used to transport Ethernet traffic over a E3 link.  Provides a simple and cost effective method to convert and transport ethernet data over an E3 link  Both Ethernet (Electrical and Optical) interfaces may be used simultaneously. Product Overview

3. Slide 3 Orion Telecom Networks Inc. - 2010Slide 3 Ethernet over E3 Switch Application Diagram Ethernet over E3 Switch

4. Slide 4 Orion Telecom Networks Inc. - 2010Slide 4 Ethernet over E3 Switch Ethernet over E3 Switch - Front View:

5. Slide 5 Orion Telecom Networks Inc. - 2010Slide 5 Ethernet over E3 Switch  Ethernet interface to G.703 E3 34 Mbps converter  4x100BaseT full duplex fast ethernet interface in accordance with IEEE802.3  3x100BaseT full duplex fast ethernet interface + 1x100Base-FX full duplex optical ethernet interface accordance with IEEE802.3  Framed and un-framed E3 options available  Local and Remote access and monitoring with either RS232 or 10/100BaseT for remote management over TCP/IP network Features and Highlights:

6. Slide 6 Orion Telecom Networks Inc. - 2010Slide 6 Ethernet over E3 Switch  Power Supply: -48V DC, Dual (1+1) protected Inputs or AC 100V to 240V AC, 50Hz / 60Hz power supply options available  Ethernet frame size 2016 bytes (max)  Supports Jumbo Frames  Accommodates up to 8192 frames with a maximum frame size of 2016 bytes  Prevents any data overflows, or loss of packets in the event of a data burst. Features and Highlights:

7. Slide 7 Orion Telecom Networks Inc. - 2010Slide 7 Ethernet over E3 Switch  Interface Types100BaseT and 100Base-FX optical  Standards ComplianceIEEE 802.3-2002 RFC1662 RFC2615 X.86 RMII  Interface Rate100BaseT limited to E3 transmission rate  ProtocolHDLC/X.86 (LAPS) Encapsulation Ethernet Interface:

8. Slide 8 Orion Telecom Networks Inc. - 2010Slide 8 Ethernet over E3 Switch  Bit Rate34.368 Mbps  Bit Rate Tolerance+20ppm  Line Code HDB3  Frame StructureAs per G.751  InterfacesAs per G.703  ConnectorsBNC, Co-axial Un-balanced  Impedance75 Ohms E3 Interface:

9. Slide 9 Orion Telecom Networks Inc. - 2010Slide 9 Ethernet over E3 Switch  100BaseT Ethernet and 100Base-FX optical to E3 conversion (Ethernet over E3). Applications:  Telnet interface for remote programming and monitoring by using CLI text commands  Easy to use programming using Windows based GUI. Programmable Features:  Status of alarms on E3 interface  Status of alarms on 100BaseT interface. Status Monitoring:

10. Slide 10 Orion Telecom Networks Inc. - 2010Slide 10 Ethernet over E3 Switch  E3 Loss of Signal  Loss of E3 frame (in framed E3 mode)  Loss of incoming signal at 100 BaseT ethernet  Loss of ethernet packets, errored ethernet packets, over-sized ethernet packets and under-sized ethernet packets log.  Configuration Error Alarm  Clock Status  3 Volts Power Supply  -48V DC present  Configuration Error Indications and Alarm Monitoring:

11. Slide 11 Orion Telecom Networks Inc. - 2010Slide 11 Ethernet over E3 Switch Thank you for your attention For more details visit us at our Website at http://www.oriontelecom.com Regional Office: Miami, Florida Orion Telecom Networks Inc. 4000 Ponce de Leon Blvd. Suite 470, Coral Gables, FL 33146 U.S.A. Phone: 1-305-777-0419, Fax: 1-305-777-0201 E-mail: sales@oriontelecom.com Website: http://www.oriontelecom.com Headquarters: Phoenix, Arizona Orion Telecom Networks Inc. 16810, Avenue of the Fountains, Suite # 108, Fountain Hills, AZ 85268 U.S.A. Phone: +1 480-816-8672, Fax: +1 480-816-0115 E-mail: sales@oriontelecom.com Website: http://www.oriontelecom.com