| 000 | 00539cam a2200133 4500 | ||
|---|---|---|---|
| 100 | 1 | _aCOLLINS Barry | |
| 245 |
_aThe Great British switch-off/ _cBarry Collins |
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| 260 | _c2021 | ||
| 520 | _aAbout the UK telephone network that will come to an end in 2025. But the migration to modern digital technology will affect many things. | ||
| 650 |
_aPUBLIC SWITCHED TELEPHONE NETWORK _xPSTN _xMODERN DIGITAL TECHNOLOGY |
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| 773 | _aPC Pro - London Issue 322 August 2021, pp.36 (84) | ||
| 598 | _aIT, UK, TECHNOLOGY | ||
| 945 |
_i66813.1001 _rY _sY |
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| 999 |
_c40935 _d40935 |
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