AXE telephone exchange
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The AXE is a product line of telephone exchanges (such as the AXE 810) manufactured by Ericsson, a Swedish telecom company.
The AXE is the digital successor to the AKE analogue telephone exchange. The design is modular with an APZ dual processor running in sync mode, an APT switching part and an APG I/O part. It is used to connect local land lines, operate mobile networks (TDMA, GSM, CDMA, WCDMA, PDC), international telephony traffic and signalling.
The brain of the AXE system is a dual processor called APZ. It runs in parallel sync mode making it fault redundant. The family of APZs started with APZ 210 04 back in 1976 and the latest one is APZ 212 50 released in early 2006.
The core of the switching part was the Group Switch, initially a time-space-time multiplexer capable of switching up to 128K positions or connections. This Group Switch later evolved to a standard switch reaching a maximum capacity of 512K.
