Callingcard.com United States

Callingcard.com is an online retailer of virtual prepaid phone cards.

Callingcard.com is an online retailer of virtual prepaid phone cards. A virtual phone card is much like a traditional phone card, except that they are delivered in the form of a 14 digit PIN # via email. We do not print physical cards. This fact gives our customers two main advantages: Phone Cards can be used only minutes after purchasing them, as well as allowing us to give you the absolute lowest long distance rates.We may do business online, but unlike most online retailers we offer live customer support. Real people, waiting to assist you with any questions you may have. Customer satisfaction is our highest priority, so don`t hesitate to contact us. We value your business and want you to be completely happy with our product.Best part of all, since your phone card is prepaid you will never receive a bill from us. Just pay as you go.

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General office

Callingcard.com
1412 av M #2354
Brooklyn
NY ,11230
United States

Phone: +1 718-724-2700 ext
Site: http://www.callingcard.com

Contact Person

Mike Perkel / manager
Phone: +1 718-724-2700 ext

International VoIP Wholesale Provider
Internet Telephony Service Provider
Voip Termination ISP

Phone To Phone
IP devices
Termination
Partnering for Origination and Termination

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Billing system of own development

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In 1998, the Internet Engineering Task Force (IETF) published the specification for a Session Description Protocol or SDP as a format that describes parameters for streaming media. The original IETF Proposed Standard was updated in 2006 as RFC 4566. Although the SDP was created as a feature of Session Announcement Protocol (SAP), it can be used with Real-time Transport Protocol, Real-time Streaming Protocol (RTSP), and Session Initiation Protocol, as well as a standalone protocol. Parameter negotiation, session announcement and session invitation are included in the descriptive sessions from the SDP protocol. Rather than transmit data like other types of protocols, an SDP negotiates between media type endpoints, format and properties involved. A session begins when a connection is established, and the session is terminated only after every endpoint is no longer participating.

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