Home

Results 1 - 10 of 14,694 for dirty duct. Search took 0.58 seconds.  
Sort by date/Sort by relevance
Since access points mostly obviate new roadway intrusions, traffic delays from duct‐related road works are greatly reduced and avoid the high cost of surface reinstatement [b‐3]  Sharing the higher initial installation cost of ducts across all services could make rural service, and SSC suburbs, more economically feasible. Where ducts are used, all networks are typically underground in multi‐purpose ducts. (...) To make local infrastructure more resistant to disasters, such as earthquake, a 220‐kilometer common utility duct is being planned for the Yokohama‐Kawasaki area in Kanagawa Prefecture.
Language:English
Score: 1453134.4 - https://www.itu.int/en/publica.../files/basic-html/page417.html
Data Source: un
L.73: Methods for inspecting and repairing underground plastic ducts This Recommendation describes some inspection methods to check buried duct quality, and also describes various methods that are utilized to repair underground conduits. (...) Floating techniques for installation of fibre-optic cables L.57: Air-assisted installation of fibre-optic cables This Recommendation describes air-assisted methods for installing fibre-optic cables in ducts. L.61: Optical fibre cable installation by floating technique This Recommendation describes the floating technique for installing fibre-optic cables in ducts. (...) L.77: Installation of fibre-optic cables in sewer ducts This Recommendation describes methods to install ducts/fibre-optic cables inside sewer ducts.
Language:English
Score: 1431035.3 - https://www.itu.int/dms_pub/it.../0B/04/T0B0400003B2C01PDFE.pdf
Data Source: un
Unless otherwise specified, the thicknesses of the duct sheet metal must be as follows: Rectangular ducts: Up to 700 mm: From 700 to 1300 mm: Over 1301 mm: 0.70 mm 0.90 mm 1.10 mm Circular or Spiro ducts: Up to Ø 200 mm: From 225 mm to 500 mm: From 500 mm to 1000 mm: From 1000 mm to 1600 mm: 0.45 mm 0.62 mm 0.80 mm 1.00 mm 2.2 Supply ducts Supply ducts may be cylindrical (Spiro), square or rectangular. (...) Sound absorbers must be installed to minimise noise pollution in the ventilated rooms. 2.3 Return and extraction ducts Return or extraction ducts may be cylindrical (Spiro), square or rectangular. (...) Structured-type ducts with reinforcing strips must be used for high-pressure systems (air speed greater than 10 m/s) and unstructured ducts for low-pressure systems (air speed less than 10 m/s).
Language:English
Score: 1428689.2 - https://www.ungeneva.org/sites...n_Version-du-29-06-2016_EN.pdf
Data Source: un
L.10 : Optical fibre cables for duct and tunnel application   Français   Español     Home : ITU-T : Publications : Recommendations : L Series : L.10 Recently posted  -  Search Recommendations     L.10 : Optical fibre cables for duct and tunnel application Recommendation L.10 In force components Number Title Status L.100/L.10 (05/21)   Optical fibre cables for duct and tunnel application   To be published In force     Superseded and Withdrawn components Number Title Status L.10 (11/88)   Optical fibre cables for duct, tunnel, aerial and buried application   Superseded L.10 (12/02)   Optical fibre cables for duct and tunnel application   Superseded L.10 (08/15)   Optical fibre cables for duct and tunnel application   Former ITU-T L.10 renumbered as ITU-T L.100 on 2016-02-15 without further modification and without being republished.
Language:English
Score: 1423849.9 - https://www.itu.int/rec/T-REC-L.10
Data Source: un
In this context, access by operators to existing civil infrastructure has a growing importance, considering that the costs for building ducts and associated infrastructure are a considerable part of investment on NGA. In Portugal, the historical operator (PT Comunicações – PTC), as the concessionary of the telecommunications public service and dominant operator in the wholesale (physical) network infrastructure access at a fixed location, is subject to the rules established in the Electronic Communications Law (Law 5/20041 The reference offer specifies the key operational aspects and processes for enabling duct sharing, namely, request for information on ducts, feasibility analysis on duct occupation, accreditation, physical access, co-ordination procedures, pricing, service level agreements and penalties and is important in fostering the use of the incumbent’s duct by other operators. (...) As a result, PTC after ICP-ANACOM decision of 17.07.2004 was obliged to publish a reference offer for access to ducts, which entered in force in July 2006. Another key issue associated with duct access was the imposition made by ICP-ANACOM establishing that PTC should make available in a database accessible through an Extranet page, information regarding ducts (paths and space available), with the respective price oriented to costs.
Language:English
Score: 1414396.3 - https://www.itu.int/ITU-D/treg...ion/contributions/Portugal.pdf
Data Source: un
In this context, access by operators to existing civil infrastructure has a growing importance, considering that the costs for building ducts and associated infrastructure are a considerable part of investment on NGA. In Portugal, the historical operator (PT Comunicações – PTC), as the concessionary of the telecommunications public service and dominant operator in the wholesale (physical) network infrastructure access at a fixed location, is subject to the rules established in the Electronic Communications Law (Law 5/20041 The reference offer specifies the key operational aspects and processes for enabling duct sharing, namely, request for information on ducts, feasibility analysis on duct occupation, accreditation, physical access, co-ordination procedures, pricing, service level agreements and penalties and is important in fostering the use of the incumbent’s duct by other operators. (...) As a result, PTC after ICP-ANACOM decision of 17.07.2004 was obliged to publish a reference offer for access to ducts, which entered in force in July 2006. Another key issue associated with duct access was the imposition made by ICP-ANACOM establishing that PTC should make available in a database accessible through an Extranet page, information regarding ducts (paths and space available), with the respective price oriented to costs.
Language:English
Score: 1414396.3 - https://www.itu.int/ITU-D/treg...ion/contributions/Portugal.pdf
Data Source: un
L.100 : Optical fibre cables for duct and tunnel application   Français   Español     Home : ITU-T : Publications : Recommendations : L Series : L.100 Recently posted  -  Search Recommendations     L.100 : Optical fibre cables for duct and tunnel application Recommendation L.100 In force components Number Title Status L.100 (08/15)   Optical fibre cables for duct and tunnel application   In force L.100/L.10 (05/21)   Optical fibre cables for duct and tunnel application   In force     Superseded and Withdrawn components Number Title Status L.10 (08/15)   Optical fibre cables for duct and tunnel application   Former ITU-T L.10 renumbered as ITU-T L.100 on 2016-02-15 without further modification and without being republished.
Language:English
Score: 1409403.2 - https://www.itu.int/rec/T-REC-L.100/_page.print
Data Source: un
QUESTIONNAIRE ON OPTICAL FIBRE CABLE INSTALLATION ALONG RAILWAYS 1) Type of physical carriers included in the cable (%) a) Optical fibre b) Optical fibre and metallic conductors c) Others 2) Type of protection used in the optical fibre (%) a) Tight-tube configuration b) Loose- fibres in the tube configuration c) Loose- fibres in the groove configuration d) Fibre ribbon configuration e) Others 3) Type of infrastructures used in the urban zone (%) a) Ducts b) Aerial c) Directly buried d) Dielectric protective tube e) Others 4) Type of infrastructures used in the unurban area (%) a) Ducts b) Aerial c) Directly buried d) Dielectric protective tube e) Others 5) Type of ducts used in the urban area (%) a) Local telecommunication provider’s ducts b) Railway company’s ducts c) Others 6) Type of ducts used in the unurban area (%) a) Local telecommunication provider’s ducts b) Railway company’s ducts c) Others 7) Type of cable core for cables used in ducts (%) a) Loose tube b) Central loose tube c) Slotted core d) Ribbon core e) Ribbon in the slot f) Loose tube in the slot g) Others 8) Type of sheath used in cables to be used in duct system (%) a) Non-armoured b) Armoured c) Non-armoured in dielectric subduct d) Others 9) Type of armour used in armoured duct cables (%) a) Dielectric (please indicate the type) b) Metallic (please indicate the type) c) Others 10) Type of cable core for direct buried cables (%) a) Loose tube b) Monotube (unitube, lightpack) c) Slotted core d) Ribbon core e) Ribbon in the slot f) Loose tube in the slot g) Others 11) Type of sheath used in the direct buried cables (%) a) Non-armoured b) Armoured c) Non-armoured in dielectric protective tube d) Others 12) Type of armour used in armoured direct buried cables (%) a) Dielectric (please indicate the type) b) Metallic (please indicate the type) c) Others 13) Type of cable core for aerial cables (%) a) Loose tube b) Central loose tube c) Slotted core d) Ribbon core e) Ribbon in the slot f) Loose tube in the slot g) Others 14) Type of sheath used in the aerial cables in the urban area (%) a) Non-armoured (dielectric) b) Armoured (against hunters, squirrels, birds etc) c) Others 15) Precautions taken when the railway company’s power supply is used a) Ground feed-through b) Mechanical strength in the cable (quantify) c) Others 16) Type of sheath used in the aerial cables in the unurban area (%) a) Non-armoured (dielectric) b) Armoured (against hunters, squirrels, birds etc) c) Others 17) Type of armour used in armoured aerial cables (%) a) Dielectric (please indicate the type) b) Metallic (please indicate the type) c) Others 18) Types of poles used in aerial applications (%) a) Railway’s power supply line b) Telecommunication provider’s line poles c) Line poles parallel to the railway’s line d) Others 19) Material of poles used for telecommunication aerial cables (%) a) Wooden b) Concrete c) Iron d) Other 20) Material of poles used for railways power supply (%) a) Wooden b) Concrete c) Iron d) Other 21) If you suspend cables on the telecommunication pole, what is the minimum distance from ground level to aerial cable? (...) a) With rollers (slider fixing) b) With clamp (tight fixing) c) Others 30) Precautions taken when the sheath is metallic a) Ground feed-through b) Bond wires c) Others 31) Type of binding used in the cable installed in tunnels (%) a) In ducts b) Fixed on the wall with staples c) Fixed on the support d) Others 32) Type of installation used for cables on bridges (%) a) In ducts b) On staples c) Others 33) In cables installed in manholes, where is the splice made? (...) (%) a) In the infrastructure of the bridge b) The splice is avoided c) Others 42) What properties must the splice closures in ducts have? (%) a) Water blocking b) Pressurised c) Others 43) What properties must the splice closures in aerial application have?
Language:English
Score: 1398254 - https://www.itu.int/itudoc/itu-t/com6/circ/01-04/039_ww9.doc
Data Source: un
QUESTIONNAIRE ON OPTICAL FIBRE CABLE INSTALLATION ALONG RAILWAYS 1) Type of physical carriers included in the cable (%) a) Optical fibre b) Optical fibre and metallic conductors c) Others 2) Type of protection used in the optical fibre (%) a) Tight-tube configuration b) Loose- fibres in the tube configuration c) Loose- fibres in the groove configuration d) Fibre ribbon configuration e) Others 3) Type of infrastructures used in the urban zone (%) a) Ducts b) Aerial c) Directly buried d) Dielectric protective tube e) Others 4) Type of infrastructures used in the unurban area (%) a) Ducts b) Aerial c) Directly buried d) Dielectric protective tube e) Others 5) Type of ducts used in the urban area (%) a) Local telecommunication provider’s ducts b) Railway company’s ducts c) Others 6) Type of ducts used in the unurban area (%) a) Local telecommunication provider’s ducts b) Railway company’s ducts c) Others 7) Type of cable core for cables used in ducts (%) a) Loose tube b) Central loose tube c) Slotted core d) Ribbon core e) Ribbon in the slot f) Loose tube in the slot g) Others 8) Type of sheath used in cables to be used in duct system (%) a) Non-armoured b) Armoured c) Non-armoured in dielectric subduct d) Others 9) Type of armour used in armoured duct cables (%) a) Dielectric (please indicate the type) b) Metallic (please indicate the type) c) Others 10) Type of cable core for direct buried cables (%) a) Loose tube b) Monotube (unitube, lightpack) c) Slotted core d) Ribbon core e) Ribbon in the slot f) Loose tube in the slot g) Others 11) Type of sheath used in the direct buried cables (%) a) Non-armoured b) Armoured c) Non-armoured in dielectric protective tube d) Others 12) Type of armour used in armoured direct buried cables (%) a) Dielectric (please indicate the type) b) Metallic (please indicate the type) c) Others 13) Type of cable core for aerial cables (%) a) Loose tube b) Central loose tube c) Slotted core d) Ribbon core e) Ribbon in the slot f) Loose tube in the slot g) Others 14) Type of sheath used in the aerial cables in the urban area (%) a) Non-armoured (dielectric) b) Armoured (against hunters, squirrels, birds etc) c) Others 15) Precautions taken when the railway company’s power supply is used a) Ground feed-through b) Mechanical strength in the cable (quantify) c) Others 16) Type of sheath used in the aerial cables in the unurban area (%) a) Non-armoured (dielectric) b) Armoured (against hunters, squirrels, birds etc) c) Others 17) Type of armour used in armoured aerial cables (%) a) Dielectric (please indicate the type) b) Metallic (please indicate the type) c) Others 18) Types of poles used in aerial applications (%) a) Railway’s power supply line b) Telecommunication provider’s line poles c) Line poles parallel to the railway’s line d) Others 19) Material of poles used for telecommunication aerial cables (%) a) Wooden b) Concrete c) Iron d) Other 20) Material of poles used for railways power supply (%) a) Wooden b) Concrete c) Iron d) Other 21) If you suspend cables on the telecommunication pole, what is the minimum distance from ground level to aerial cable? (...) a) With rollers (slider fixing) b) With clamp (tight fixing) c) Others 30) Precautions taken when the sheath is metallic a) Ground feed-through b) Bond wires c) Others 31) Type of binding used in the cable installed in tunnels (%) a) In ducts b) Fixed on the wall with staples c) Fixed on the support d) Others 32) Type of installation used for cables on bridges (%) a) In ducts b) On staples c) Others 33) In cables installed in manholes, where is the splice made? (...) (%) a) In the infrastructure of the bridge b) The splice is avoided c) Others 42) What properties must the splice closures in ducts have? (%) a) Water blocking b) Pressurised c) Others 43) What properties must the splice closures in aerial application have?
Language:English
Score: 1398254 - https://www.itu.int/itudoc/itu-t/circ/01-04_1/039_ww9.doc
Data Source: un
L.78 : Optical fibre cable construction for sewer duct applications   Français   Español     Home : ITU-T : Publications : Recommendations : L Series : L.78 Recently posted  -  Search Recommendations     L.78 : Optical fibre cable construction for sewer duct applications Recommendation L.78 In force components Number Title Status L.78 (05/08)   Optical fibre cable construction for sewer duct applications   Former ITU-T L.78 renumbered as ITU-T L.107 on 2016-02-15 without further modification and without being republished. In force L.78 (2008) Amendment 1 (06/10)   New Appendix III - Italian experience: Construction of special optical fibre cables for extreme applications in sewer ducts   Former ITU-T L.78 renumbered as ITU-T L.107 on 2016-02-15 without further modification and without being republished.
Language:English
Score: 1379224 - https://www.itu.int/rec/T-REC-L.78
Data Source: un