Wanna block all the STD ansd ISD calls from your BSNL telephone? For 100% protection against improper use, you can lock your BSNL telephone electronically. Here, you only know the secret code. You can lock/allow Local, STD or ISD calls in many way viz. all calls allowed, only local calls allowed, only STD & Local calls allowed, all outgoing calls barred etc.
| Register Secret Code | Suppose 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 code | Suppose 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 | Dial 124 5555 1 then wait for the acceptance tone then disconnect. Now STD/ISD calls will be barred . |
| Open STD/ISD calls | Dial 124 5555 0 then wait for the acceptance tone then disconnect. Now STD/ISD calls can be made. |
| Open STD calls only | Dial 124 5555 3 then wait for the acceptance tone then disconnect. Now STD calls can be made. |
| Bar STD/ISD/manual trunck calls | Dial 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 | Dial 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 | Dial 124 5555 1 or 2 then wait for the acceptance tone then disconnect. Now Local calls can be made. |
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