8/3/2019 AXE Telephone Exchange - Wikipedia, The Free Encyclopedia

1/2

AXE telephone exchangeFrom Wikipedia, the free encyclopedia

The AXE telephone exchange is a product line of circuit switched digital telephone exchanges manufactured

by Ericsson, a Swedish telecom company. It was developed in 1974 by Ellemtel, a research and development

subsidiary of Ericsson and Televerket.[1]. The first system was deployed in 1976. AXE is an acronym for

Automatic Cross-Connection Equipment.

The AXE is the digital successor to the AKE analogue telephone exchange and ARF/ARM family of crossbar

switches. 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 for connecting local landlines, operate mobile networks (TDMA, GSM, CDMA,

W-CDMA, PDC), international telephony traffic and signalling.

AXE based equipment are being used as MSC, HLR, SCP, FNR, TSC and wireline nodes.

The brain of the AXE system is a dual processor system called APZ. It runs in parallel sync mode making it fault

redundant. The family of APZs started with APZ 210 03 in 1976; the latest one is APZ 212 60. The parallel sync

mode was partly abandoned in the APZ 212 40 and subsequent models and has been replaced with a warm

standby scheme.

The latest implementation of AXE is on a blade cluster system capable of handling up to 8 million subscribers.

The core of the switching part was the Group Switch, initially a time-space-time multiplexer capable of

switching up to 64K positions or connections. This Group Switch later evolved to a Distributed Group Switch

using Time-Space switching technique with a maximum capacity of 512K.

AXE nodes have evolved as a traffic controller, having the new Media Gateway node running on CPP platform

handle the payload traffic.

Ericsson AXE telephone exchanges support lawful intercepts via the remote-control equipment subsystem(RES), which carries out the tap, and the interception management system (IMS), software used for initiating the

tap, which adds the tap to the RES database. In a fully operating lawful interception system the RES and IMS

both create logs of all numbers being tapped so that system administrators can perform audits to find

unauthorized taps.

Code is written in PLEX (a proprietary language tied to the AXE hardware, designed by Gran Hemdahl [2]),

SDL and ASA210C programming languages. Code for Regional Processors (controlling hardware Extension

Modules) is written in ASA210R.

See alsoSystem Y UK term for the AXE10

Greek telephone tapping case 2004-2005

The latest APZ type is 214 01 which is use as MSC and TSC Blade in AXE.

Notes

^ http://www.ericssonhistory.com/templates/Ericsson/Article.aspx?id=2057&ArticleID=1858&CatID=354&1.

telephone exchange - Wikipedia, the free encyclopedia file:///F:/e products/ercsn trng/AXE_telephone_exc

1/4/2011 1

or Evaluation Only.opyright (c) by VeryPDF.com Incdited by VeryPDF PDF Editor Version 2.6

8/3/2019 AXE Telephone Exchange - Wikipedia, The Free Encyclopedia

2/2

epslanguage=EN

^ http://www.cs.chalmers.se/Cs/Grundutb/Kurser/ppxt/HT2007/general/languages/armstrong-erlang_history.pdf2.

External links

Ericsson AXE web page (http://www.ericsson.com/solutions/page.asp?ArticleId=53744359-1E2D-

4CAF-9782-1F545C2D2F8F&category=Operators)

Retrieved from "http://en.wikipedia.org/wiki/AXE_telephone_exchange"

Categories: Telephone exchange equipment | Ericsson | Telecommunications stubs

This page was last modified on 15 December 2010 at 18:36.

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may

apply. See Terms of Use for details.

Wikipedia is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization.

telephone exchange - Wikipedia, the free encyclopedia file:///F:/e products/ercsn trng/AXE_telephone_exc

1/4/2011 1