Copyright, Valiant Communications Limited VCL-SR-MUX V aliant C ommunications L imited Telecom Transmission Solutions Confidential Slide 1 G.703, 64Kbps Sub-Rate Multiplexer Updated : January, 2005 U.K. Valiant Communications (UK) Ltd 1, Acton Hill Mews, Uxbridge Road, London W3 9QN, United Kingdom Website: INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi , India Phone: , Fax: , Website: U.S.A. Valcomm Technologies Inc Ponce de Leon, Suite 470 Coral Gables, FL United States of America Website:

Copyright, Valiant Communications Limited Product Overview VCL-SR-MUX Confidential Slide 2 Valiant G.703, Sub-Rate Multiplexer multiplexes Six 9.6Kbps RS232 asynchronous data channels to a 64Kbps, G.703 co-directional, 4 wire synchronous data channel. The front panel has six, RS232 data ports into which upto six, RS232 asynchronous data 9.6Kbps each may be connected. The six RS232 asynchronous data 9.6Kbps are multiplexed into a 64Kbps, G.703 co-directional, 4 wire synchronous data channel, which is accessed from the system backpanel (rear). The equipment uses data buffering and phase-lock-loop techniques to ensure error free multiplexing and demultiplexing between the synchronous and asynchronous data ports. Front panel LED indicators indicate presence of Transmit and Receive data signal on each of the data ports. The equipment operates on a nominal -48VDC Input (-40VDC to 60VDC Input). The system also provides two dry-contact relay alarm outputs (normally open) on the backpanel (rear) which close to indicate the presence of a system alarm.

Copyright, Valiant Communications Limited APPLICATIONS: Confidential Slide 4 Thin-Route Telephony satellite, radio and data networks Establishing Multiple Telemetry Links SCADA Networks To transport multiple compressed voice channels interface with VCL-TRLD to provide upto six voice channels on 64Kbps links. Interface to 64Kbps radios VCL-SR-MUX

Copyright, Valiant Communications Limited Confidential Slide 5 Specifications of 64kbps, Synchronous Data Interface Port Number of Interfaces per System1 ConformityTo (CCITT) Rec. G.703 Type4 Wire, co-directional ModeSynchronous Bit Rate64Kbps Specifications of RS 9.6Kbps, Asynchronous Data Interface Port Number of Interfaces per System6 TypeRS 232 Tx, Rx, Gnd ModeAsynchronous Baud Rate9.6 kbps - Fixed Data Size8bits ParityNone Flow Control None ( Xon / X off ) Stop Bit1 VCL-SR-MUX

Copyright, Valiant Communications Limited VCL-SR-MUX

Confidential Slide 28 VCL Products E1, Voice & Data Drop-Insert Multiplexer PRI ISDN (Q.931) Multiplexers E1 Intelligent Channel Banks E1 / T1 DCME (Digital Circuit Multiplication Equipment) - Voice Compression Equipment Thin Route DCME E1 / T1 Echo Cancellers E1 / T1 Digital Cross Connect T1 / E1 Converters E3, 34Mbps Multiplexer 34Mbps Optical Line Transmission Equipment (OLTE) Digital Loop Carrier Remote Asset Management Systems

Copyright, Valiant Communications Limited Thank you for your attention For more details visit us at our Website at U.K. Valiant Communications (UK) Ltd 1, Acton Hill Mews, Uxbridge Road, London W3 9QN, United Kingdom Website: INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi , India Phone: , Fax: , Website: U.S.A. Valcomm Technologies Inc Ponce de Leon, Suite 470 Coral Gables, FL United States of America Website: