| 摘要 |
PURPOSE:To enable to use trunks uniformly, by providing a memory relay for selective connection of the talkie supply device side in the talkie trunk and by operating this relay to select the talkie tone which the calling extension requests. CONSTITUTION:After dial tone connection, the calling extension dials a number corresponding to the purpose of the talkie service. MKR discriminates number information calculated in the originating register and operates route relay R for talkie trunk connection by C code expansion. After an idle talkie trunk and a link are selected on a basis of route determination, the trunk connector is closed to operate the F relay of the talkie trunk. A TK relay corresponding to the purpose of the talkie service is operated on a basis of C code expansion by the operation of the F relay. After the calling extension and the talkie trunk are connected, the TK relay is self-held by the earth of the b<2> contact of the B position relay of the talkie trunk. As a result, the calling extension listens to the objective talkie tone. |
