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Valiant Communications Limited Telecom Transmission Solutions E 1 Automatic Protection Switching Solution (1+1 E Valiant Communications Limited Telecom Transmission Solutions E 1 Automatic Protection Switching Solution (1+1 E 1 Redundancy Switch) U. K. U. S. A. INDIA Valiant Communications (UK) Ltd 1, Acton Hill Mews, 310 -328 Uxbridge Road, London W 3 9 QN, United Kingdom E-mail: [email protected] com Website: http: //www. valiantcom. com Valcomm Technologies Inc. 4000 Ponce de Leon, Suite 470 Coral Gables, FL 33146 United States of America E-mail: [email protected] com Website: http: //www. valiantcom. com Valiant Communications Limited 71/1, Shivaji Marg, New Delhi - 110015, India E-mail: [email protected] com Website: http: //www. valiantcom. com Updated : January, 2006 Valiant Communications Limited - 2006 Slide 1

E 1 Automatic Protection Switching Solution Basic Theory of Operation E 1 Redundancy Switch E 1 Automatic Protection Switching Solution Basic Theory of Operation E 1 Redundancy Switch is designed to provide 1+1 redundancy support for two typical E 1 links case scenarios: • An independent point-to-point E 1 link between two "E 1 USER PORTS" • TWO groups of E 1 links connected via a higher order multiplexer link. Since each SWITCH Card supports one E 1 link, up to 16 E 1 links, can be supported by an E 1 Redundancy Switch Shelf. Two Systems are required for implementation of the 1+1 redundancy switch solution. One system must house Switch Cards configured as "MASTER" for connection at one end of the E 1 links (say the near end). The other system must house Switch Cards configured as "SLAVE" for connection at the other end of the E 1 links (say the far end). Valiant Communications Limited - 2006 Slide 2

E 1 Automatic Protection Switching Solution Features & Highlights • Provides 1+1 E 1 E 1 Automatic Protection Switching Solution Features & Highlights • Provides 1+1 E 1 redundancy link (active+standby) between any two complementing transmission mediums. • Provides 1+1 E 1 redundancy support to higher order multiplexers eg. E 2, E 3. System configuration & management interface through "CLI" text based commands. • Transport A-bis Interface or E 1’s. • Provide 1 + 1 Protection Routing / Path between BSC and BTS. Provide following interfaces at BSC / BTS Over E 1 links: • E 1 / A-bis Interface. • 10 Base. T Ethernet Bridge. • RS 232 Async Serial (for site monitoring). • NO / NC Relay / Alarm Extensions (Extend alarms Originating on dry relay contacts). • Optional - 128 ms Echo - Cancellation and VQE features at BSC. • Maximize mobile operator service availability and network resiliency through VCL-Mega. Connect-Jr. Path - Protection enabled facility. Valiant Communications Limited - 2006 Slide 3

E 1 Automatic Protection Switching Solution Features & Highlights • These ensure that mission E 1 Automatic Protection Switching Solution Features & Highlights • These ensure that mission critical voice, data, control and management traffic are properly supported and maintained even during T 1 / E 1 backhaul facility outages. When the working link fails, the protection link becomes active. • During normal Operation, VCL-Mega. Connect-Jr sends duplicate traffic across both the working and dedicated protection E 1 / T 1 facilities while continuously maintaining the performance of both links to determine which link shall be utilized. • Through the comprehensive digital access cross-connect and remote management capabilities integrated within VCL-Mega. Connect-Jr, backhaul T 1 / E 1 facilities can be optimally groomed to reduce both Capital Expenditure and improve Network reliability. • In the event of a failed or degraded T 1 / E 1 link, the traffic is automatically transferred from the previously working link to the duplicate protection link in accordance with the pre determined operating parameter programmed by the network operator. Valiant Communications Limited - 2006 Slide 4

E 1 Automatic Protection Switching Solution Features & Highlights • During normal Operation, VCL-Mega. E 1 Automatic Protection Switching Solution Features & Highlights • During normal Operation, VCL-Mega. Connect-Jr APS passes independently traffic across both the working and protection E 1 / T 1 facilities while continuously maintaining the performance of both links to determine which to utilize for critical traffic. • Traffic Protection. • Alternate Facility Advantages. • Service Differentiation Agreements. • Increased Network Reliability Resilience. • Media and Path Diversity. • Remote Management. Valiant Communications Limited - 2006 Slide 5

E 1 Automatic Protection Switching Solution Benefits Applications • • • Providing 1+1 alternate E 1 Automatic Protection Switching Solution Benefits Applications • • • Providing 1+1 alternate paths between any two Transmission medium (active+standby). e. g: - Customer Relation Competitive Service Level Back-haul Network Technology Migration 1) User Programmable 1+1 Protection Parameters: • • • Fiber / Fiber. Radio / HDSL Fiber / HDSL etc. Loss of Signal Loss of Frame Loss of Multi-Frame AIS Excessive CRC 4 Violation 2) Critical Links / Critical Time-Slots Valiant Communications Limited - 2006 Slide 6

E 1 Automatic Protection Switching Solution Applications Diagram 1+1 REDUNDANT RING CONFIGURATION APPLICATIONS # E 1 Automatic Protection Switching Solution Applications Diagram 1+1 REDUNDANT RING CONFIGURATION APPLICATIONS # 1 Valiant Communications Limited - 2006 Slide 7

E 1 Automatic Protection Switching Solution Applications Diagram TYPICAL STAR CONFIGURATION APPLICATIONS # 2 E 1 Automatic Protection Switching Solution Applications Diagram TYPICAL STAR CONFIGURATION APPLICATIONS # 2 Valiant Communications Limited - 2006 Slide 8

E 1 Automatic Protection Switching Solution Applications Diagram Two User selectable Mega. Connect options E 1 Automatic Protection Switching Solution Applications Diagram Two User selectable Mega. Connect options are available for reliable networks operation APPLICATIONS # 3 Valiant Communications Limited - 2006 Slide 9

E 1 Automatic Protection Switching Solution Applications Diagram Mega. Connect (With Path Protection Switching) E 1 Automatic Protection Switching Solution Applications Diagram Mega. Connect (With Path Protection Switching) Normal Operation APPLICATIONS # 4 Valiant Communications Limited - 2006 Slide 10

E 1 Automatic Protection Switching Solution Applications Diagram Mega. Connect (With Path Protection Switching) E 1 Automatic Protection Switching Solution Applications Diagram Mega. Connect (With Path Protection Switching) Normal Operation APPLICATIONS # 5 Valiant Communications Limited - 2006 Slide 11

E 1 Automatic Protection Switching Solution Applications Diagram Mega. Connect (With Path Protection Switching) E 1 Automatic Protection Switching Solution Applications Diagram Mega. Connect (With Path Protection Switching) Working Link Fault APPLICATIONS # 6 Valiant Communications Limited - 2006 Slide 12

E 1 Automatic Protection Switching Solution Technical Specifications E 1 Interface Number of Interfaces E 1 Automatic Protection Switching Solution Technical Specifications E 1 Interface Number of Interfaces Conformity (Electrical) Frame Structure Bit Rate Code Nominal Impedance Peak Voltage of a mark For 120 W Balanced interface Peak Voltage of a space for 120 W Balanced interface Nominal Pulse Width Pulse Mask Output Jitter Permissible Attenuation Return Loss at: 51. 2 KHz to 102. 4 KHz to 2048 KHz to 3072 KHz Jitter Tolerance Loss and recovery of frame alignment Valiant Communications Limited - 2006 16 G. 703 As per ITU (CCITT) G. 704 2048 Kbps ± 50 ppm HDB 3 120 W balanced 3. 0 V ± 0. 3 V 244 ns as per ITU (CCITT) Rec. G. 703 < 0. 05 UI (in the frequency range of 20 Hz to 100 KHz) 6 d. B at 1 MHz > 12 d. B > 18 d. B > 14 d. B As per ITU (CCITT) G. 823 As per clause 3 of ITU (CCITT) G. 732 Slide 13

E 1 Automatic Protection Switching Solution Technical Specifications Time-slot selection: ANY-TO-ANY through an internal, E 1 Automatic Protection Switching Solution Technical Specifications Time-slot selection: ANY-TO-ANY through an internal, best byte, non-blocking TSI Switch. Clock: Internal Loop-Timed External (Stratum 3 level) 75 Ohms - 2. 048 Mhz - 1. 544 Mhz Management and Control: Serial Management Port (RS 232) - COM Port 10/100 Base. T for Remote Management over a LAN. 10/100 Base. T Telnet over a TCP-IP Network. Command Language: Command Line Interface (english text commands) Valiant Communications Limited - 2006 Slide 14

E 1 Automatic Protection Switching Solution Technical Specifications Specification and Regulation Compliance Meets CE E 1 Automatic Protection Switching Solution Technical Specifications Specification and Regulation Compliance Meets CE requirements Complies with FCC, Part 68 and Part 15 subpart A specifications Safety - UL 1459 Issue 2 Alarm Contact Closures 1 Alarm Relay, Type - Form "C" relay, Temperature Operating Humidity 00 C to 500 C 5% to 95% Non-Condensing Input Voltage Current Valiant Communications Limited - 2006 -48 VDC (Range from -40 VDC to -60 VDC) 0. 104 Amp at -48 VDC Slide 15

E 1 Automatic Protection Switching Solution Valiant’s Products ü Digital Access Cross Connects - E 1 Automatic Protection Switching Solution Valiant’s Products ü Digital Access Cross Connects - E 1 / T 1 , E 3, DS 3, 10/100 Base. T Ethernet ü Groomers (Hi-Z Non-intrusive Hi-Impedance Monitoring) ü 1+1 APS (Automatic Protection Switching) ü Echo Canceller & Voice Quality Enhancement Solutions - E 1, T 1, DS 3 and STM-1 ü E 1 Drop-Insert (Add-Drop) Voice and Data Multiplexers ü E 1, T 1, E 3, DS 3, Ethernet Converters ü STM-1 Add Drop Multiplexer with Ethernet ü GSM Gateways - E 1/T 1 ü E 1 PRI ISDN (Euro ISDN) Q. 931 Multiplexers ü Channel Banks ü E 2 (4 E 1), 2/34 Mbps PDH Multiplexer, 34 Mbps OLTE ü Remote Site Monitoring Equipment Valiant Communications Limited - 2006 Slide 16

E 1 Automatic Protection Switching Solution Thank you for your attention For more details E 1 Automatic Protection Switching Solution Thank you for your attention For more details visit us at our Website at http: //www. valiantcom. com U. K. U. S. A. INDIA Valiant Communications (UK) Ltd 1, Acton Hill Mews, 310 -328 Uxbridge Road, London W 3 9 QN, United Kingdom E-mail: [email protected] com Website: http: //www. valiantcom. com Valcomm Technologies Inc. 4000 Ponce de Leon, Suite 470 Coral Gables, FL 33146 United States of America E-mail: [email protected] com Website: http: //www. valiantcom. com Valiant Communications Limited 71/1, Shivaji Marg, New Delhi - 110015, India E-mail: [email protected] com Website: http: //www. valiantcom. com Valiant Communications Limited - 2006 Slide 17