Title :
Switching systems and switching software development in China
Author :
Chen, Jiann-Jong ; Yan, Lijun ; Li, Yuhua
Author_Institution :
Beijing Univ. of Posts & Telecommun., China
fDate :
7/1/1993 12:00:00 AM
Abstract :
The architectures of two medium-sized digital telephone switching systems that were developed in China, the DS-30 and HJD-04 systems, are discussed. The DS-30 is a 30000 line digital telephone switching system, with a total capacity of 300000 busy hour call attempts (BHCA) using digital line concentration and a time-space-time switch fabric. Its architecture is a distributed control, multistage, multiprocessor system with load and function sharing. The HJD-04 is a 30000 line digital telephone switching system, with a total capacity of 2 million BHCA. The significant feature of the HJD-04 system is its switching network, which consists of a single time switch. The structure of the switching software support environment used in China is discussed.<>
Keywords :
automatic telephone systems; electronic switching systems; line concentrators; telecommunications computer control; China; DS-30; HJD-04; busy hour call attempts; digital line concentration; digital telephone switching systems; distributed control; function sharing; load sharing; multistage multiprocessor system; switching software development; time-space-time switch fabric; Communication switching; Communication system control; Computer architecture; Control systems; Linear predictive coding; Process control; Programming; Switches; Switching systems; Telephony;
Journal_Title :
Communications Magazine, IEEE
