ORION TELECOM NETWORKS INC Telecom Transmission Solutions VCLDX

ORION TELECOM NETWORKS INC. Telecom Transmission Solutions VCL-DX™ 2 Mbps E 1, Drop-Insert Pure Data Multiplexer 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 Updated : 20 th January, 2004 Orion Telecom Networks Inc. , 2003 -2004 Confidential Slide 1

VCL-DX, Pure Data Multiplexer Product Overview • E 1 Data, Drop-Insert (Add-Drop) Multiplexer • Provides wide range of digital data services • Integrates analog communication equipment with digital E 1 interface. • Effective CLI (text) based "Network Management System", • Remote monitoring and management of the inter-connected systems. • Both Inband Out-Of-Band configuration and monitoring options • An extensive set of alarms, for easy maintenance are provided in the system. Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 2

VCL-DX, Pure Data Multiplexer The Multiplexer may be used in Terminal or Drop-Insert (Add-Drop) configuration to provide: • Interconnect LAN (Campus Network) • Interconnect Computer Terminals • Provide LAN-WAN Interconnectivity • Provide Leased Lines on DSL for SOHO Applications Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 3

VCL-DX, Pure Data Multiplexer Data Interface Options • V. 35, n X 64 Kbps • V. 36, n X 64 Kbps • X. 21, n X 64 Kbps • RS 530, n X 64 Kbps • G. SHDSL, n X 64 Kbps • 10 Base. T - Router • Fractional E 1 Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 4

VCL-DX, Pure Data Multiplexer Features • Digital Data services. • Any combination ("mix-n-match") of Digital Data services deployed from a single VCL-DX "Smart Shelf". • Drop and Insert applications. • Digital Data option may be used for internet access or video conferencing application. • Wireless applications including interconnecting of Cellular Networks. • Interconnecting Vo. IP networks. • SCADA applications. • Frame Relay circuit termination. • Powerful Network Management System for monitoring and network control. • Compliance with all relevant ITU-T (CCITT) recommendations. • 3 U high, compact construction. Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 5

VCL-DX, Pure Data Multiplexer Highlights • Field upgradable to provide 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". • In-band system configuration and management interface. • Out-of-band system configuration and management interface through 10 Base. T Terminal (Optional) • Channel assignment independent of slot position in the subrack. • Extensive set of alarms. • User Selectable Internal or Loop-Timed clock options Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 6

VCL-DX, Pure Data Multiplexer Transmission Mediums • Copper • Optical Fiber • Wireless Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 7

VCL-DX, Pure Data Multiplexer Applications of VCL-DX • Digital data, or real-time video conferencing services (V. 35, V. 36, X. 21, Rs 530, 10 Base. T Router ) high-speed digital data interface options allows video conferencing channel of up to 1984 Kbps). • 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 64 Kbps up to 1984 Kbps digital data interface options. • Micro-Cellular infrastructure applications for providing cell-switch connectivity. • Wide area networking. Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 8

VCL-DX, Pure Data Multiplexer Technical Specifications E 1 Interface (Main Link) Number of Interfaces Conformity (Electrical) 2 G. 703 Frame Structure As per ITU (CCITT) G. 704 Signaling Channel Associated Signaling PCM Sampling Rate 8000 Samples / sec Encoding Law A Law as per ITU (CCITT) Bit Rate 2048 Kbps ± 50 ppm Code HDB 3 Nominal Impedance 120 W balanced / 75 W unbalanced (75 W option) Peak Voltage of a mark For 120 W Balanced interface 75 W Unbalanced interface 3. 0 V ± 0. 3 V 2. 37 V ± 0. 237 V Continue. . . Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 9

VCL-DX, Pure Data Multiplexer Continued from E 1 Interface (Main Link). . . Peak Voltage of a space for 120 W Balanced interface 0 V ± 0. 3 V 75 W Unbalanced interface 0 V ± 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 20 Hz to 100 KHz) Permissible Attenuation 6 d. B at 1 MHz Return Loss at: 51. 2 KHz to 102. 4 Khz > 12 d. B 102. 4 KHz to 2048 KHz > 18 d. B 2048 KHz to 3072 Khz > 14 d. B 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 Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 10

VCL-DX, Pure Data Multiplexer High Speed Synchronous “n X 64” Data Interface Type: V. 35 Interface Number of Interfaces per Card Bandwidth Conformity Mode V. 35 1, (”N” x 64 KBits/sec. per Card) (”N” x 64 Kbits / sec. Interface maximum value of “N” =3 1) - User Selectable V. 35 Synchronous Bit Rate 64 Kbps to 1984 Kbps User Interface DCE High Speed Synchronous “n X 64” Data Interface Type: V. 36 Interface Number of Interfaces per Card Bandwidth Conformity Mode V. 36 1, (”N” x 64 KBits/sec. per Card) (”N” x 64 Kbits / sec. Interface maximum value of “N” =31) - User Selectable V. 36 Synchronous Bit Rate 64 Kbps to 1984 Kbps User Interface DCE Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 11

VCL-DX, Pure Data Multiplexer High Speed Synchronous “n X 64” Data Interface Type: X. 21 Interface Number of Interfaces per Card Bandwidth Conformity Mode X. 21 1, (”N” x 64 KBits/sec. per Card) (”N” x 64 Kbits / sec. Interface maximum value of “N” =3 1) - User Selectable X. 21 Synchronous Bit Rate 64 Kbps to 1984 Kbps User Interface DCE High Speed Synchronous “n X 64” Data Interface Type: RS 530 Interface Number of Interfaces per Card Bandwidth Conformity Mode RS 530 1, (”N” x 64 KBits/sec. per Card) (”N” x 64 Kbits / sec. Interface maximum value of “N” =3 1) - User Selectable RS 530 Synchronous Bit Rate 64 Kbps to 1984 Kbps User Interface DCE Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 12

VCL-DX, Pure Data Multiplexer High Speed Synchronous “n X 64” Data Interface Type: 10 Base. T Ethernet Router Interface Number of Interfaces per Card Bandwidth IP routing IPQo. S Bandwidth Optimization Interoperability Supported RFCs Clock Timing Options Synchronization Sources Default Option 10 Base. T (Router) 1, (”N x 64” KBits/sec. per Card) (”N” x 64 Kbits / sec. Interface maximum value of “N” =3 1) - User Selectable RIP-I, RIP-II, static routing, IP filters, Boot. P client and relay, DHCP relay Bandwidth management (CBR, VBR), Priortization (6 levels), RTP auto detection, Diff. Serv/TOS support SW Compression (optional), MLPPP and Bandwidth on Demand, Connection on Demand IPX spoofing PPP 1058, 1213, 1315, 1332, 1334, 1389, 1471, 1472, 1473, 1474, 1490, 1493, 1519, 1542, 1573, 1604, 1631, 1638, 1661, 1662, 1723, 1724, 1812, 1850, 1962, 1974, 1990 Internal Clock, Loop-Timed Clock Internal Clock, span clock timing derived from incoming HDB 3 links (Loop Timed) Internal Clock Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 13

VCL-DX, Pure Data Multiplexer High Speed Synchronous “n X 64” Data Interface Type: G. SHDSL Interface Number of Interfaces per Card Bandwidth Compliance Handshake Support Mode Bit Rate User Interface G. SHDSL 1, (”N” x 64 KBits/sec. per Card) (”N” x 64 Kbits / sec. Interface maximum value of “N” = 31) - User Selectable ITU G. SHDSL (ITU-T / G. 991. 2) ETSI SDSL (ETSI TS 101 524) ITU G. hs (ITU-T G. 994. 1) Synchronous 128 Kbps to 1984 Kbps (User Selectable) LTU Management Interface Local Management Interface RS 232, operating @ 9. 6 Kbps CLI (text) based Interface, Hyper Terminal (VT-100 Emulation). In-band Management Interface for Remote Terminals RS 232, operating @ 9. 6 Kbps CLI (text) based Interface, Hyper Terminal (VT-100 Emulation). Out-of-Band Management Interface - Optional 10 / 100 Base. T - User Assigned IP Address Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 14

VCL-DX, Pure Data Multiplexer Environmental Temperature and Humidity 0°C to + 50°C, 90% R. H. (Non Condensing) Altitude upto 9, 000 feet Power Supply Input DC voltage Range of input Output voltages Full Load Output Current Input Voltage Reversal Protection Over Current Protection -48 V DC ( nominal ) -40 V to -60 V DC +5 V, -5 V, filtered -48 V ( for term. cards) 8 A at +5 V, 0. 5 A at -5 V Provided in the Card 10 A for +5 V, 1. 0 A for -5 V Short Circuit Protection Current limit - 6 A. Recovers on removal of short Efficiency at full load >86% Ripple at full load <5 m. Vrms Spike at full load <50 m. V Power Consumption 20 W (Worst - Case) - all data circuits active. Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 15

VCL-DX, Pure Data Multiplexer VCL-DX Digital Data Drop-Insert Multiplexer with In-band Management Interface and “n” X 64 Kbps data options Control Card 2 Power Supply Card User Configurable interface slots nx 64 Interfaces: V. 35 / V. 36 / X. 21 / RS 530 / G. SHDSL / 10 Base. T Control Card 1 Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 16

VCL-DX, Pure Data Multiplexer Rear View Core System Composition 19 -Inch Shelf 3 U high Slot 1 Slot 2 to 7 Slot 8 Slot 9 Descriptions 19 - Inch Shelf and Backplane Power Supply Card 6 User Configurable “n” X 64 Kbps data interface(s Control Card 1 Control Card 2 Part No. VCL-DX-001 VCL-DX-010 As per user requirement VCL-DX-020 VCL-DX-021 Confidential Orion Telecom Networks Inc. , 2003 -2004 Slide 17

VCL Products ü E 1, Voice & Data Drop-Insert Multiplexer ü PRI ISDN (Q. 931) Multiplexers ü E 1 Intelligent Channel Banks ü E 1 / T 1 DCME (Digital Circuit Multiplication Equipment) - Voice Compression Equipment ü Thin Route DCME ü E 1 / T 1 Echo Cancellers ü E 1 / T 1 Digital Cross Connect ü T 1 / E 1 Converters ü E 3, 34 Mbps Multiplexer ü 34 Mbps Optical Line Transmission Equipment (OLTE) ü Remote Asset Management Systems ü STM 1 / STM 4 - SDH Equipment Thank you for your attention For more details visit us at our Web Site 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 Orion Telecom Networks Inc. , 2003 -2004 Confidential Slide 18