System Y
System Y is the terminology used by BT, the main operator of the telephone network in the United Kingdom, to refer to the Ericsson AXE digital switching system.
In the mid-1980s, British Telecom chose the well established
Initially, the AXE systems installed in the UK were partially locally manufacturered in partnership with Thorn EMI and later directly by Ericsson. While System X exchanges were more widespread in BT's network, AXE10 (and subsequent versions) remain common in the classic BT PSTN until their eventual replacement when the network is closed, which at the time of the writing is expected to be in 2025 [1]
AXE10 covers two main types of
BT's AXE10 network, which has been in service since 1986,[2] is maintained in house by its own engineers although Ericsson still provide high-level support, software upgrades and repairs at component level.
AXE/System Y, System X and other TDM technologies are already being be phased out as BT, in common with many networks around the world, implements its next generation access network, which will ultimately be based predominantly on fibre to premises (FTTP), with voice services provided using VoIP technology. [3]
References
- ^ "The UK's PSTN network will switch off in 2025".
- ^ "Digital Switching" Archived 2008-07-25 at the Wayback Machine, Connected Earth, accessed 2009-05-17
- ^ "Openreach Aim for 15 Million UK FTTP Broadband Premises by 2025". 9 May 2019.