A BT spokeswoman told us: "We have less than 200 broadband customers still without service and are working to fix that. There was also a large concrete block that could be used to seal the ventilation shaft. All ordinary engineers were replaced with chosen managers and no women were allowed. There are several surface structures connected to the exchange still in existence, there is a goods lift in Lional street; this is similar in construction to the one at Guardian (George Street) and is probably the exhaust for the complex being the tallest of the vents. There is rumour of a similar centre in Glasgow although there is no hard evidence to confirm this exists. Our client had a tight programme with the refurbishments taking place over an eighteen month period by our team of thirty Operatives and Supervisors. The BT Deep Level Tunnels are a series of tunnels that contain communications services (cables, fibre optics etc) underneath major cities. [2][3], Kingsway Telephone Exchange has two entrances. Initially built as a deep-level air-raid shelter in the early 1940s, it was instead used as a government communications centre. We understand that the transfer of work of the BTFS DLT team to Openreach will be 01 July 2018. This will be subject to consultation with the CWU and further updates will be provided. The BT Deep Level Tunnels are a series of tunnels that contain communications services (cables, fibre optics etc) underneath major cities. This former entrance no longer exists following the re-development in Digbeth. This repeater was also part of the “ring main” and had special quality cables to Anchor, Lyndon Green and Gloucester, the cable pairs were used to carry radio quality broadcasts. Music quality broadcast CCTS (50hz - 20,000hz) were installed all over the Midlands mostly terminating at Anchor. There was strict no smoking rules with staff only being allowed to smoke in the mess room. BT is still working to fix problems created by a tunnelling machine which crashed through one of its deep level tunnels cutting fibre optic and copper lines early on Saturday afternoon. We will provide further updates as soon as we have more information. Material from the Public Records Office was stored there from 1945 to 1949.[1]. There are various other vents that can be seen including St Chads where a small building is more than likely taking the mains electricity supply into the complex. All personel were required to utilise Drager gas warning monitors and oxygen re-breathers at all times on site. In the opposite direction the same tunnel reaches Essex Street making it around 4000ft in length. Our Operatives and Supervisors who worked on this project had to undergo specific three day training on the specific Health and Safety issues associated with these works. Anchor would have had a positive pressure ventilation system to prevent outside contamination. These tunnels stretch for some twenty-five miles and criss-cross the capital at an average of 30 to 40 metres below the surface with many access and egress points. Its bar claimed to be the deepest in the United Kingdom, located at approximately 200 feet below street level. They only had a speech band of 300hz - 3400hz but the signal to noise ratio was better. These tunnels stretch for some twenty-five miles and criss-cross the capital at an average of 30 to 40 metres below the surface with many access and egress points. the … Also located on site was the Radio Interference Investigation Group, whose function was to prevent television viewers and radio listeners in north and central London from suffering interference to their service from external sources such as thermostats, fluorescent tubes and injection moulding equipment. At the time a student working part time on the construction site told his story to a student union magazine but to this day the author of the article has protected his source. An uncompleted tunnel heads off towards Hockley and from Hockley back towards Anchor but they don’t join and there is a large gap where this tunnel wasn’t finished. Copyright © The Communications Workers Union 1995-2020. There are three known exchanges, London (Kingsway), Manchester (Guardian) and Birmingham (Anchor). The tunnels run on a decline away from the exchange in line with the surface contour of the land but at Essex Street the depth of the tunnel is only 60ft so even though the tunnels are on the decline the land drops away at a faster rate making the tunnel quite shallow by the time it reaches Essex Street. Although Anchor was officially opened at this time engineers had been busy preparing for this moment for over a year installing £2m worth of equipment. Anchor takes its name from the Birmingham assay office which is above the exchange, the mark for Birmingham being an anchor. The Post Office (now BT) network of deep level cable tunnels under central London. Once the enclosures were live we undertook bolt replacement and leak sealing of the tunnel liner rings. The repeater Bm/C Selly Oak is not hardened and is more like a satellite repeater attached to the side of the exchange. Due to advances in weapons they were obsolete by the time they were complete, however they still played an important part in national communications.

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