Abstract: A telephony device is assigned two telephone numbers, a first telephone number from a first country and a second telephone number from a second country. When a user places an outgoing call to a telephone number in the first country, the caller ID information indicates that the call is originating from the first telephone number associated with the first country. Also, the user is charged only the local termination rates for calls in the first country, regardless of where the telephony device is located when the call is placed. When the user places an outgoing call to a telephone number in the second country, the caller ID information indicates that the call originated from the second telephone number, associated with the second country. Also, the user is charged only the standard local termination rates for calls in the second country, regardless of where the telephony device is located when the call is placed.

Abstract: A telephony device is assigned two telephone numbers, a first telephone number from a first country and a second telephone number from a second country. When a user places an outgoing call to a telephone number in the first country, the caller ID information indicates that the call is originating from the first telephone number associated with the first country. Also, the user is charged only the local termination rates for calls in the first country, regardless of where the telephony device is located when the call is placed. When the user places an outgoing call to a telephone number in the second country, the caller ID information indicates that the call originated from the second telephone number, associated with the second country. Also, the user is charged only the standard local termination rates for calls in the second country, regardless of where the telephony device is located when the call is placed.

Abstract: An IP telephony system allows users of the IP telephony system to register extension telephony devices with the IP telephony system. An extension telephony device is one that is provided with service by a separate telephony service provider. Once an extension telephony device is registered, a user can obtain communications services from the IP telephony system using the extension telephony device. An extension telephony device may be tied to a user's main telephony services account with the IP telephony system such that when the user obtains communications services from the IP telephony system using an extension telephony device, the user will be billed for those communications services through the user's main account.