What is 21CN network?

The 21st Century Network (21CN) programme is the data and voice network transformation project, under way since 2004, of the UK telecommunications company BT Group plc. It was intended to move BT’s telephone network from the AXE/System X Public Switched Telephone Network (PSTN) to an Internet Protocol (IP) system.

What happened to 21CN?

BT Wholesale’s long running upgrade to the 21st Century Network (21CN) powered Wholesale Broadband Connect (WBC) platform, which began in 2004 and is the foundation for many of the modern digital IP and broadband ISP technologies on their UK network, still has 98 exchanges left to upgrade and some won’t be done until …

What is a MetroNODE?

MetroNODE 10GE™ high performance service assurance nodes provide the most accurate, lowest delay, highest capacity service assurance capabilities. MetroNODE 10GE NE�Node is a high capacity, low delay OAM aggregation node designed for core network applications, including both core to core and core to edge.

How many BT exchanges are there?

High level 21CN network structure We’ll start from the bottom level (the 5600 exchanges) and work our way up to the core of the new BT network.

What is the purpose of the 21CN network?

What is “21CN”? 21CN (21 st Century Network) is a Next Generation Network (NGN) being deployed by British Telecom over the next 5 years. The core aim of the project is to bring the UK’s telecoms network in to the digital age, whilst at the same time allowing BT to save up to £1billion per year in costs [0].

When did Wick exchange move to 21CN network?

Wick was the first exchange to be migrated to the 21CN network. It appears that the Wick migration was staggered in to two stages – a first round o f 275 customers were changed over in April, followed by the remaining ones in May (our estimates have Wick at circa 500 phone lines).

What was the purpose of the BT 21CN project?

BT 21CN. The 21st Century Network (21CN) programme is the data and voice network transformation project, under way since 2004, of the UK telecommunications company BT Group plc. It was intended to move BT’s telephone network from the AXE / System X Public Switched Telephone Network (PSTN) to an Internet Protocol (IP) system.

What’s the difference between 20CN and 21CN?

The most significant differences between the legacy 20th century network (20CN) and 21CN are: The use of VoIP landline telephone services served digitally, rather than the previous analogue PSTN system. This does not mean telephone services are provided over the Internet with 21CN.