Computer to Computer

• Peer-to-peer;
• Uses free services such as Skype, MSN Messenger, Yahoo Messenger, among others;
• The computers are responsible for call signaling and control.

Computer to telephone

• PSTN Gateway needed;
• Peer-to-peer up to the gateway;
• uses pre or post paid services such as the SkypeOut, Net2Phone, V59, among others;
• The gateway is responsible for call signaling and control.

Rgulation section:

www.teleco.com.br/tutorias.asp

FAQ - Regulations Aspects for IP Telephony

Service

Characteristics

Consumer

• Provided by Operators with IP Telephony Networks that are interconnected to the conventional telephony networks (public and cellular services) ;
• The Operator provides the IP telephone or IP adapter and the broad band connection;
• The subscriber receives a phone number from the operators assigned numbering range;
• Originates and receives calls either for/from IP telephones and conventional telephones (public and cellular services);
• In addition, the subscriber can be connected to the Operator network through any IP broad band connection, either in the subscriber address or any other addresses, using the same phone number and even keeping the contracted service rates;
• Call control and signaling (as well as the aditional services and gateways) are managed by equipments especially designed for this purpose(Soft-switches);
• Examples of IP Telephony Operators: Vonage, AT&T - CallVantage e GVT.

Enterprise

• Uses IP PBX's and corporative data networks;
• The user uses a computer or an IP telephone or an IP adapter and a data connection from the corporative network;
• The user receives a number from the corporative extensions numbering range;
• Originates and receives calls either for/from IP telephones, computers and conventional telephones (public and cellular services);
• The user can be connected to the corporative network eihter in the regular office or any another address of the company keeping the assigned extension number and configured services;
• Call control and signaling (as well as the aditional services and gateways) are managed by equipments especially designed for this purpose (Call Manager).