We are working on VoIP and Vicidial / Asterisk based solution since last 8 years.
We have done similar projects as per the requirement mention in Job Description.
We need to discuss your requirement in detail to provide you better solution.
For any further information on our work & company you can visit our website [login to view URL]
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Add me over a skype: [login to view URL] & also share your skype id to discuss further in detail.