Technical Standards in Hong Kong - Telephone Sockets

Telephone Sockets

Before the handover of Hong Kong, all the domestic telephone sockets installed were BS 6312 British telephone sockets but there was no stipulation on commercial telephone sockets. Both Registered Jack (RJ) and BS 6312 systems were (and are) found in commercial telephone installations.

After the handover, the Hong Kong Government started gradually replacing the BS 6312 sockets with American RJ ones. Service providers install RJ sockets, instead of BS 6312 ones, for clients in new installation, relocation or maintenance projects. Existing BS 6312 sockets before the handover are still in use and there is no compulsory replacement programme.

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