System for rewriting information in rewritable memory provided in portable remote terminal and portable remote terminal applicable to the system

A system comprising:

• a portable remote terminal for communicating with other terminal devices;
• and
• an external unit for supplying data to said portable remote terminal, said portable remote terminal including:
• a connector for connecting said portable remote terminal to said external unit;
• rewritable memory means for storing first information used in said portable remote terminal;
• debugging tool memory means for storing a first program for rewriting said first information stored in said rewritable memory means;
• and
• rewriting means, coupled to said rewritable memory means and to said debugging tool memory means, for rewriting the first information stored in said rewritable memory means in correspondence with information supplied from said external unit via said connector, said rewriting being effected in accordance with said first program stored in said debugging tool memory means.