registering the secret code, note it down somewhere. Repetitive attempts using
a wrong code may permanently jam the STD/ISD and disable the dynamic control
facility. In such a case re-setting is done by an application at the Customer
Centre. After initialization, re-register your secret code afresh as per the
procedure for initial registration. Normally keep your STD\ISD barred. Open it
when you need it. Again bar it after use.
provided free of charge.
To avail the
facility please apply to Divisional Customer Service Center of your Area.
In case of
difficulty, Please contact DE(I/D) in charge of the exchange.
and their Codes
Electronic Exchanges (5ESS) :
325, 431, 432, 581, 612, 613, 614, 615, 616, 617, 618, 619, 625, 628, 629,
641, 649, 689, 701, 702, 704, 705, 726, 745, 746, 786, 787