Patent ID: 8477776

Claim:
A modem to communicate with a session initiation protocol (SIP) server, a media gateway control protocol (MGCP) server and a trivial file transfer protocol (TFTP) server, the modem comprising a processor, a storage system, and one or more programs, wherein the one or more programs are stored in the storage system and operable to be executed by the processor, and the SIP server and the MGCP server respectively have a service identification (ID), the modem further comprising: a multimedia terminal adapter (MTA) module comprising a packet cable 1.X (PC1.X) module and a packet cable 2.0 (PC2.0) module, wherein the packet cable 1.X (PC1.X) module is operable to establish a connection between the modem and the MGCP server with PC1.X, the PC1.X is a communication standard that uses MGCP as VoIP signaling protocol; a communication module operable to send a configuration file requesting packet to the TFTP server and receive configuration files fed back by the TFTP server, wherein the configuration files comprise a file identification (ID); a parsing module operable to parse the configuration files to obtain the file ID; and a selecting module operable to configure the MTA module according to the file ID, wherein the selecting module configures the PC2.0 module upon the condition that the file ID is the service ID of the SIP server, and configures the PC1.X module when the file ID is the service ID of the MGCP server.