Configuring guest users for a VoIP device of a primary user

A method for providing VoIP telephony to a plurality of users of a VoIP network, comprising:

• authenticating a VoIP device to the VoIP network in response to the VoIP device providing a unique hardware identifier and a digital certificate to the VoIP network for identification;
• registering a primary user to the authenticated VoIP device wherein a directory number of the primary user is mapped to the unique hardware identifier and wherein a first set of VoIP parameters are downloaded from the VoIP network to the VoIP device in order to support call signaling associated with the primary user;
• sending a request to the VoIP network to provision a guest user for the VoIP device;
• authenticating the guest user as a subscriber of the VoIP network having a guest user directory number in response to sending a password of the guest user to the VoIP network;
• registering the guest user to the authenticated VoIP device wherein the guest user directory number is mapped to the unique hardware identifier and wherein a second set of VoIP parameters are downloaded from the VoIP network to the VoIP device in order to support call signaling associated with the guest user;
• and
• directing VoIP calls within the VoIP network in response to the mappings of the primary user directory number and the guest user directory number to the same unique hardware identifier.