1. Orion Telecom Networks Inc. - 2007Slide 1 VCL100MC-16 Updated : January, 2007 VCL100MC-16 Next Generation STM-1/4/16 Platform 16810, Avenue of 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 Web Site: http://www.oriontelecom.com

2. Orion Telecom Networks Inc. - 2007Slide 2 VCL100MC-16 VCL100MC-16  Next generation STM-1/4/16 Platform  Extensive Support for Data traffic FE & GigE transport over VC12s/VC3s/VC4s Ethernet Switching/VLAN switching  High Density Platform 567xE1 from a single chassis 8 STM-1 rings subtended from 1 STM-16 ADM 2 STM-4 rings subtended from 1 STM-16 ADM  High capacity 7.5Gig fully non blocking XC at VC12 granularity  Managed by the same NMS as other VCL100 platforms (VCL-NMS)

3. Orion Telecom Networks Inc. - 2007Slide 3 VCL100MC-16 VCL100MC-16: Line Diagram 1PSM1PSM 4TRIB4TRIB 5TRIB5TRIB 6TRIB6TRIB 7AGG7AGG 8XCC8XCC 9XCC9XCC 10 A G 11 T R I B 12 T R I B 13 T R I B 14 T R I B 15 P S M 2TRIB2TRIB 3TRIB3TRIB 17 FAN 16 MFC

4. Orion Telecom Networks Inc. - 2007Slide 4 VCL100MC-16  XCC provides following functionalities Cross Connect matrix  Fully non-blocking VC-12/VC-3/VC-4  7.5Gig (48x48 STM-1/OC-3 equivalent)  12.5Gig (80x80 STM-1/OC-3 equivalent) will be available in future  Unidirectional, Bidirectional, Multicast and Broadcast Control Sub-system  Architected to support dense cross connect configurations  High processing capability to handle control plane loads in large DXC locations Can handle multiple subtended rings Timing Sub-system  Timing can be derived from External inputs – 2MHz or 2Mbps STM-1/4/16 or OC-3/12/48 and E1 Interfaces Internal Stratum-3 clock  SSM support on S1 byte Common Modules: Cross Connect and Controller Card (XCC)

5. Orion Telecom Networks Inc. - 2007Slide 5 VCL100MC-16  PSM: takes - 48 V DC as input and provides - 5 V & - 12 V DC to other subsystems. It has the following features: - 36 V DC to - 60 V DC operation Reverse Polarity protection Automatic shutdown when power exceeds - 60 V or falls below -36 V No impact on operation for power interruption < 4ms Inrush limiting as per ETSI EN 300 132-2 Redundancy of Power Supply Fuse protection in case of overloads/failures. Power Supply Module

6. Orion Telecom Networks Inc. - 2007Slide 6 VCL100MC-16  MFC – provides the following: NMS (10/100Base-Tx) Craft (RS-232) F1 user channel and Modem interface (RS232) Engineering OrderWire Audio-visual indication of alarms through Hooter and LEDs Seven External Alarm inputs and four Potential free contacts for alarm outputs Multi-function Card (MFC)

7. Orion Telecom Networks Inc. - 2007Slide 7 VCL100MC-16 Traffic Modules  Optical Cards: 1xSTM-16 SFP Based 2xSTM-4 / 8xSTM-1 card  SFP Based. Individual STM-1/4 ports can use different SFPs  A contiguous block of four STM-1s can be upgraded to a single STM-4  Mix and match STM-1 o/e up to one STM-16  Data Cards: 8x10/100BaseT Ethernet Transport Card ( STM-1 backhaul) 4x10/100BaseT and 4 x 100BaseFX Ethernet Transport Card ( STM-1 backhaul) 2xGigabit Ethernet Transport Card (STM8 backhaul) 8xFE + 2xGigE Ethernet Switching Card (STM4 backhaul) 8xFE + 2xGigE Ethernet Switching Card (STM8 backhaul) *  PDH Cards: 63xE1 3xE3/DS3

8. Orion Telecom Networks Inc. - 2007Slide 8 VCL100MC-16  Higher Tributary Density: VCL100MC-16 can drop up to 567xE1s from the chassis using 63xE1s tributary cards  Subtended Rings: VCL100MC-16 can function as a stand-alone  cross connect subtending  8xSTM-1/OC-3 rings OR  2xSTM-4/OC-12 rings OR  And  1xSTM-16/OC-48 rings  All configurations with full VC-12/VT1.5  cross connects possible between the rings Hardware Features 2xSTM-4/OC-12 rings STM-1/OC- 3 Ring

9. Orion Telecom Networks Inc. - 2007Slide 9 VCL100MC-16 VCL100MC-16 Bandwidth Distribution  7.5G XC Slot 6 and 11 are serial slots with maximum uplink of STM-8 each Slots 2-5 and 12-14 are parallel slots with maximum uplink of STM-1 each Total uplink from all tributary slots (slots 2-6 and slots 11-14) can be STM-16  12.5G XC (in future) Slots 2-5 and 13-14 can be serial slots with maximum uplink of STM-4 each and slots 6,11,12 can be serial slots with maximum uplink of STM-8 each All trib slots can be parallel slots with maximum uplink of STM-1 each Total uplink from all tributary (slots 2-6 and slots 11-14) can be 3 x STM-16

10. Orion Telecom Networks Inc. - 2007Slide 10 VCL100MC-16 VCL100MC-16: Application Diagram STM-16 STM-1 Ring STM-1 Ring STM-4 Ring Ethernet Services for Corporate Customers Ethernet Private Line Ethernet Virtual Private Line Ethernet LAN VCL100MC-16 10/100 Base-T FE, GE VCL100MC-16 Drop up to 567 E1/DS1 for Wireline and Wireless Backhaul VCL100MC-16 FE, GE DSLAM Aggregation 10/100 Mbps Ethernet

11. Orion Telecom Networks Inc. - 2007Slide 11 VCL100MC-16 Network Protection  Support for all standard and emerging network protection features such as 1+1 MSP SNCP 2F MS-SPRing LCAS Protection for Ethernet RSTP Protection with Ethernet switching.

12. Orion Telecom Networks Inc. - 2007Slide 12 VCL100MC-16 Equipment Protection  VCL100MC-16 can offer redundancy to: Power Supply Module (PSM) 1+1 hot standby and load-sharing modes Cross Connect (XCC) Control Sub-system Integrated within the Cross Connect (XCC)  Optical Cards (Using MSP or SNCP)  Timing sub-system & Interfaces

13. Orion Telecom Networks Inc. - 2007Slide 13 VCL100MC-16 Multi-service Support  Supports FE & GigE Interfaces and Layer 2 switching  Complies to the latest ITU-T Recommendations on transport of EoS G.7041 (GFP) G.7042 (LCAS) G.707 (Virtual Concatenation)  10/100BaseT interfaces can be mapped to both LO (VC-12/VT1.5) and HO (VC-3/STS-1 and  VC-4/STS-3) virtual containers  Gigabit Ethernet traffic is mapped to HO virtual containers  Layer 2 Switching complies to IEEE 802 standards IEEE 802.1D (Bridging) IEEE 802.1Q (VLAN)  Also IEEE 802.1p (priority) IEEE 802.3x (Flow Control) IEEE 802.1w (Rapid STP), 802.1s (Multiple STP) IEEE 802.3ad (link aggregation) IEEE 802.1ag (Connectivity fault management) MEF 9 & MEF 14

14. Orion Telecom Networks Inc. - 2007Slide 14 VCL100MC-16 Software Features  Software intelligence is a key differentiator of VCL100MC-16 as also of all other VCL100 platforms  Some advanced features which are typically associated with high-end DWDM platforms are provided on VCL100MC-16 Auto topology discovery  G.7714 Customer Network Management  Provision for the customer to self-provision circuits over his part of the VCL100 network using standard web browser interfaces Northbound SNMP ensures seamless integration with third party EMS

15. Orion Telecom Networks Inc. - 2007Slide 15 VCL100MC-16 Management Connectivity  VCL100MC-16 has a wide range of management options to effectively inter-operate with other vendor equipments in mixed deployment scenarios. DCC-R DCC-M F2/F3 bytes E1/VC12 management channel Dial-in using modem port Ethernet Management.  DCC transparency DCC-R, DCC-M, F1, F2/F3 can be passed through, permitting third party nodes to co-exist in the same ring.

16. Orion Telecom Networks Inc. - 2007Slide 16 VCL100MC-16 Sweet-Spots for VCL100MC-16  Optimized for a variety of stand-alone ring Point-of-Interconnect (PoI) applications Consolidation of the PoI infrastructure by integrating  Multi-rate Optical Interfaces (STM-1/4/16)  Can be positioned as a versatile gateway element Support for SDH interfaces Support for both AU3 and AU4 mapping modes  ADM applications with subtending rings Each ring can be protected using a different protection scheme  Say, SNCP on one ring, MS-SPRing on another Support for large E1,E3/DS3 traffic add-drops  Wave feeder for DWDM networks due to support for 15xx nm interfaces

17. Orion Telecom Networks Inc. - 2007Slide 17 VCL100MC-16 Thank you for your attention For more details visit us at our Website at http://www.oriontelecom.com 16810, Avenue of 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 Web Site: http://www.oriontelecom.com