SYSTEM FOR COLLATING EXTERNAL LINE AND SYSTEM OF EXTERNAL LINE TRANSFER

摘要

PURPOSE:To confirm a number of a trunk line during talking from an extension by using a specific number dial of an extension subscriber to inform an identification number of the trunk line to the extension subscriber from a voice generator. CONSTITUTION:When the extension subscriber A, for example, is talking with a trunk line C/O1 and the subscriber A hooks off, then the trunk line trunk COT1 and a holding tone device HLD, and the subscriber A and an outgoing register OR are connected respectively. When the subscriber A dials a special number for the collation of the number of the trunk line in this state, a central controller CC connects the subscriber A and a voice synthesizer VGU, identifies the trunk line C/O1 to be held from the trunk line trunk COT and transmits the identification number to the VGU. Thus, the VGU synthesizes the identification number of the C/O1 and transmits the said identification number to the subscriber A in voice.