Locking/Unlocking B.S.N.L Phones This is only for Landline Phones.

Register Secret CodeSuppose you want to make 5555 your secret code. Follow this procedure to register this:

Dial 123 5555 5555 then wait for the acceptance tone then disconnect. Your code is registered.

Change secret codeSuppose you want to change current code 5555 to 4444 then Dial 123 5555 4444 then wait for the acceptance tone then disconnect. Your new code(4444) is registered.

Bar/Open Facilities using Secret Code(example 5555)

Bar STD/ISD calls locked

Dial 124 5555 1 then wait for the acceptance tone then disconnect. Now STD/ISD calls will be barred .

Open STD/ISD calls unlocked

Dial 124 5555 0 then wait for the acceptance tone then disconnect. Now STD/ISD calls can be made.

Open STD calls only unlockedDial 124 5555 3 then wait for the acceptance tone then disconnect. Now STD calls can be made.

Bar STD/ISD/manual trunck calls lockedDial 124 5555 2 then wait for the acceptance tone then disconnect. Now STD/ISD/manual trunck calls will be barred . (It will also bar calls to 95 level).

Bar local calls lockedDial 124 5555 4 then wait for the acceptance tone then disconnect. Now localcalls will be barred .(applicable only if STD Facility is available).

Open local calls only unlockedDial 124 5555 1 or 2 then wait for the acceptance tone then disconnect. Now Local calls can be made.