Systems and methods for location management and emergency support for a voice over internet protocol device

A tangible machine readable storage device comprising instructions which, when executed, cause a processor to at least:

• after receiving a first call initiated by a device using a first public user identifier, determine whether the first call is eligible to be established using a nomadic service based on whether the first public user identifier is stored in association with a first nomadic service designator indicating that the device is eligible to use the nomadic service to access a voice over internet protocol service from different network locations, and based on whether the first public user identifier is stored in association with a first operating mode designator indicating that the device is eligible for voice over internet protocol calls to or from telephone numbers not selected by a voice over internet protocol service provider;
• and
• after receiving a second call initiated by the device using a second public user identifier, determine whether the second call is eligible to be established using the nomadic service based on whether the second public user identifier is stored in association with a second nomadic service designator indicating whether the device is eligible to use the nomadic service to access the voice over internet protocol service from the different network locations, and based on whether the second public user identifier is stored in association with a second operating mode designator indicating that the device is eligible for the voice over internet protocol calls to or from the telephone numbers not selected by the voice over internet protocol service provider,
• the first and second nomadic service designators configurable to respectively different nomadic permissions for the first and second public user identifiers, and the first and second operating mode designators configurable to respectively different operating modes for the first and second public user identifiers.

A method comprising:

• after receiving a first call initiated by a device using a first public user identifier, operating a call session controller to determine whether the first call is eligible to be established using a nomadic service based on whether the first public user identifier is stored in association with a first nomadic service designator indicating that the device is eligible to use the nomadic service to access a voice over internet protocol service from different network locations, and based on whether the first public user identifier is stored in association with a first operating mode designator indicating that the device is eligible for voice over internet protocol calls to or from telephone numbers not selected by a voice over internet protocol service provider;
• and
• after receiving a second call initiated by the device using a second public user identifier, operating the call session controller to determine whether the second call is eligible to be established using the nomadic service based on whether the second public user identifier is stored in association with a second nomadic service designator indicating whether the device is eligible to use the nomadic service to access the voice over internet protocol service from the different network locations, and based on whether the second public user identifier is stored in association with a second operating mode designator indicating that the device is eligible for the voice over internet protocol calls to or from the telephone numbers not selected by the voice over internet protocol service provider,
• the first and second nomadic service designators configurable to respectively different nomadic permissions for the first and second public user identifiers, and the first and second operating mode designators configurable to respectively different operating modes for the first and second public user identifiers.