JEM-413A switches a bearer for AMR, packet, or multi-call by conducting simple operations from the terminal without changing the scenario so that terminal application software developers can perform tests under conditions similar to an actual base station. (1) PPP supported: (2) DNS capability supported (1) U-Plane(User Data)logging and saving and recalling into a file (2) Log display at TCP/IP level (1) ATTACH/DETACH (Location Update) (2) AMR 12,2k Speech (3) PS Packet(UL;64/DL;384kbps) JEM-413 HW status display TCP/IP Setting FW update (1) CS packet (UDI 64bps) (2) Multi call (3) Audio codec (AV 64K)