Method and system for over-the-top voice for internet of things devices

A network device comprising:

• a communication interface;
• a memory, wherein the memory stores instructions;
• and
• a processor, wherein the processor executes the instructions to:
• receive, via the communication interface and from an end device, a first session establishment message pertaining to a voice service that restricts the end device to place a voice call to and receive a voice call from a designated call center;
• replace a uniform resource identifier of the designated call center included in the first session establishment message, with an enterprise identifier included in subscription data pertaining to the end device;
• select, based on the enterprise identifier, another network device to transmit the first session establishment message;
• and
• transmit, via the communication interface and to the other network device, the first session establishment message based on the selection.

A non-transitory, computer-readable storage medium storing instructions executable by a processor of a network device, which when executed cause the network device to:

• receive from the end device, a first session establishment message pertaining to a voice service that restricts the end device to place a voice call to and receive a voice call from a designated call center;
• replace a uniform resource identifier of the designated call center included in the first session establishment message, with an enterprise identifier included in subscription data pertaining to the end device;
• select, based on the enterprise identifier, another network device to transmit the first session establishment message;
• and
• transmit to the other network device, the first session establishment message based on the selection.