Wireless butt set

A wireless butt set for testing a telephone line includes a base station that is connectable to tip and ring leads of a line under test. A handset is detachably nestable with the base station to form a hand-held integrated butt set assembly. This allows a craftperson to directly or remotely control the test set using controls of the wireless telephone handset. The internal circuitry of the base station is placed in a high impedance line-monitoring mode without going off-hook, in response to one 'click' of a talk switch of the handset, and goes off-hook in response to a 'double-click' of talk switch handset.