Patent ID: 7065099
Filing Date: 2006-06-20
Classification: H04J

Abstract:
1. In a digital circuit multiplication equipment equipped with a tandem pass-through function capable of pass-through transmitting a signal, using a trunk channel, connected via an exchange to another digital circuit multiplication equipment, the digital circuit multiplication equipment comprising: means for transmitting number of a trunk channel operated under pass-through operation to the another digital circuit multiplication equipment connected via a bearer circuit; means for continuously assigning the bearer circuit with respect to the trunk channel operated under pass-through operation; means for embedding information indicative of a encoding rate of a encoded speech signal from the bearer circuit into the signal which is outputted with respect to the trunk channel operated under pass-through operation; means for detecting the information indicative of said encoding rate from an input signal of the trunk channel operated under pass-through operation; means for determining an assignment of said trunk channel to the bearer circuit by using said encoding rate detected from the input signal of the trunk channel operated under pass-through operation; and means for delaying the encoded speech signal contained in the input signal of the trunk channel in such a case that when the encoding rate of the encoded speech signal contained in the input signal of the trunk channel operated under pass-through operation is transmitted, the assignment rate change of said trunk channel to the bearer circuit is delayed, and for starting to output the delayed encoded speech signal after the bearer circuit has been assigned.