locate master phone socket

[JOHNROLLO]

I live in modern bungalow. telephone feed is under ground, going in to main bedroom. There are phone sockets in all of the rooms,& 2 IN the study. None have any indication as to main socket any ideas how to locate the master socket PLEASE.

[nextzmobile]

How To Connect RS232 Data Cable In Satellite Receiver All Brand

[DOUGALMCD]

UK Telephone Wiring (http://www.wppltd.demon.co.uk/WPP/Wiring/UK_telephone/uk_telephone.html)

There should be a difference in the socket type ie master will be different from slave.