Arrangements for calling a number of substations in a predetermined sequence until an answer is obtained

Introduced: September 1968

Last revised: January 2006

Full Title

Automatic or semi-automatic exchanges > Systems providing special services or facilities to subscribers > Arrangements for calling a number of substations in a predetermined sequence until an answer is obtained

Classification Context

Section:: ELECTRICITY
Class:: ELECTRIC COMMUNICATION TECHNIQUE
Subclass:: TELEPHONIC COMMUNICATION