Opto Telelinks mainly focused on the wholesale carrier technologies and services. Opto Telelinks has vast size of network spanning India and rest of the World. Opto can provide voice services to any of these countries in these continents. Opto also has network for African Countries and Australia. Opto can on the fly add any new carrier using its least cost routing technologies. Opto Telelinks infrastructure is inter-operable with any standard H323 complaint VOIP systems of any vendor. Opto provides most competitive rates for any of the countries mentioned above.

Call anywhere in the world using Opto Telelinks Calling Cards. The Centralized Calling Card concept is a new concept for the service providers from Opto Telelinks Limited.

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Opto Telelinks designed and developed the most advanced H.323 based soft-switch to cater the requirements for the Voice Exchange Carriers, Corporate, Calling Card service Providers and BPO units.

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Call Shop enables users to make IP based long distance communications based on the least cost routing technology.

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The Enterprise Voice Communication package of Opto Telelinks Limited consists of pure Soft-Switch and VoIP Technologies to cater for the inter-office Voice communications using the existing VPN Network without spending any money on inter-office communications.

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