TIPTEL Ergophone 307 Operating Instructions Manual page 7

In Austria, slot F corresponds to this symbol:

corresponds to this symbol
place of the TAE adaptor.
In Switzerland, a T+T83 A12 socket should be used, into which

you should insert the enclosed T+T connection cable. If re-
quired, use an A6 adaptor in place of an A12 adaptor.
Service
. Use the enclosed TST adaptor in
and slot N