DIGITAL COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To directly download the software corresponding to changes of various services or a new service for version-up. SOLUTION: This digital communication device 1 provided between a digital network DN and communication terminals T is provided with a memory 102 having a storage region (software storage section) and an execution region (software execution section) of a control software for conducting the communication control corresponding to the digital network DN and a CPU 101 for conducting the communication control corresponding to the digital network DN by using the memory control software. When the control software is to be updated with the version-up software obtained by downloading, the control software is kept on part of the software storage section, the version-up software is temporarily stored on the remainder of the software storage section, and the control software is updated with the stored version-up software.