All material used at the project site shall be approved prior to the start of IP Telephony system installation works. Materials and documentation relevant to a particular section of works will be checked by the site/project engineer prior to the commencement of work ensuring that these are of the correct type as reviewed by the client.
Before commencement of any construction works, pre-inspections will be carried out on all materials prior to them leaving the storage area i.e. quantity, physical damage and brand/make.
Works shall not proceed until an approved shop drawing or detail is issued.
Safe access to work areas shall be provided and shall be approved by the competent safety person prior to commencement of works if applicable.
Co-ordination with Other Trades
MEP engineers shall coordinate works as per coordinated drawings developed to ensure locations for electrical services are in accordance with approved shop drawing and or on site requirements.
Future disconnection and relocation shall be done as per the shop drawings which are to be coordinated and approved by the civil project manager & MEP manager and civil construction manager if applicable.
Material Delivery, Storage and Handling
a) Verify the cable length and locate any defects in cable, splices, and connector.
b) Store the materials properly and prevent the damage to material while loading & unloading.
c) Furnish extra materials that match products installed and that are packaged with protective covering for storage and identified with labels describing contents, as below:
- Patch-Panel Units: One of each type.
- Connecting Blocks: One of each type.
- Device Plates: One of each type.
- Multiuser Telecommunications Outlet Assemblies: One of each type.
General Work Sequence
Ensure that civil department have completed ply/post tension works on the slab.
Ensure that the Co-Ordination drawing is ready as per site requirement for MEP Services and site clearance is available.
Identify location of Telephone devices based on coordinated & approved shop drawings.
Ensure correct type & size of cables / wires related to different Telephone systems are pulled till the installation points.
Double check dimension of Telephone devices to be fixed to make sure that these are as per approved shop drawings & suitable as per site condition.
Ensure power points related to Telephone field devices / main system racks as applicable are available based on approved shop drawings.
Check the installation procedures mentioned in installation guide and accordingly take up installation of low current devices.
Before taking up termination ensure wires / cables being fed from source are completely isolated / disconnected.
Take up termination of cables related to Telephone devices accordingly.
Ensure proper tools are used to carry out terminations like: cutter, small hand crimping tool, punching tool, solder gun etc.
Ensure terminations of cables being carried out are all well identified to match the system requirement.
Activate the system after complete termination & installation works by providing temporary power supply to main system racks / related field devices.
Ensure functionality test, visual test & other related tests are carried out and commission the system.
Ensure permanent labelling is done for all Telephone cables including system racks & related field devices.
After completion of the installation and testing, prepare the as built drawing for authorities’ approval.
Telephony System Installation
The specialist contractor is solely responsible for the complete turn-key engineering of the new IP-based Telephony Communications System and all inter-connecting facilities.
Acceptance of works will be restricted to the equipment and installations complying with the approved submittals, approved shop drawings, and the consultant representative’s agreement.
Contractor shall perform station reviews, data base preparation, and original program initializations, and shall install, configure and test the components of the IP-based Telephony Communications System including the gateway System.
The Contractor has to carry out any site works under direct supervision of qualified technicians who are to be well trained with qualified Manufacturer experience.
Contractor shall complete the required data circuits from the system to the end user station.
The Contractor shall coordinate the ordering of all long-distance and local communications facilities and services as per contract and approved drawing.
Ensure that WAN circuits are in place as required.
After services have been provided, the contractor shall test the services to ensure functionality.
Cabling made by the contractor shall account for redundancy, disaster recovery, and protection against single points of failure.
The telephony system shall comply as a minimum with standard Ethernet distance limitations.
Site workmanship of any network component has to be limited to the layout and fixation, and inter-wiring of various items of the readymade equipment.
Installation of Pathways
Cable Trays: Comply with NEMA VE 2 and TIA/EIA-569-B-7.
Comply with requirements for demarcation point, pathways, cabinets, and racks specified as per the specifications.
In compliance with TIA/EIA-569-B for pull-box sizing and length of conduit and number of bends between pull points.
Comply with requirements for installation of conduits and wire ways as per the specifications.
Install manufactured conduit sweeps and long-radius elbows whenever possible.
Pathway Installation in Communications Equipment Rooms: Position conduit ends adjacent to a corner on backboard where a single piece of plywood is installed, or in the corner of room where multiple sheets of plywood are installed around perimeter walls of room.
Install cable trays to route cables if conduits cannot be located in these positions.
Secure conduits to backboard when entering room from overhead.
Extend conduits (76 mm) above finished floor.
Install metal conduits with grounding bushings and connect with grounding conductor to grounding system.
Backboards: Install backboards with (2440-mm) dimension vertical. Butt adjacent sheets tightly, and form smooth gap-free corners and joints.
Installation of cables for Telephony System
a) Comply with NECA 1.
b) General Requirements for Cabling:
c) Comply with TIA/EIA-568-B.1.
d) Comply with BICSI ITSIM, Ch. 6, “Cable Termination Practices.”
e) Install 110-style IDC termination hardware unless otherwise indicated.
f) MUTOA shall not be used as a cross-connect point.
g) Consolidation points may be used only for making a direct connection to telecommunications outlet/connectors.
h) Do not use consolidation point as a cross-connect point, as a patch connection, or for direct connection to workstation equipment.
i) Locate consolidation points for UTP at least (15 m) from communications equipment room.
j) Terminate conductors; no cable shall contain un-terminated elements. Make terminations only at indicated outlets, terminals, cross-connects, and patch panels.
k) Cables may not be spliced. Secure and support cables at intervals not exceeding (760 mm) and not more than (150 mm) from cabinets, boxes, fittings, outlets, racks, frames, and terminals.
l) Install lacing bars to restrain cables, to prevent straining connections, and to prevent bending cables to smaller radii than minimums recommended by manufacturer.
m) Bundle, lace, and train conductors to terminal points without exceeding manufacturer’s limitations on bending radii, but not less than radii specified in BICSI ITSIM, “Cabling Termination Practices” Chapter. Install lacing bars and distribution spools.
n) Do not install bruised, kinked, scored, deformed, or abraded cable. Do not splice cable between termination, tap, or junction points. Remove and discard telephone cable if damaged during installation and replace it with new cable.
o) Cold-Weather Installation: Bring cable to room temperature before de-reeling. Heat lamps shall not be used for heating. In the communications equipment room, install a (3-m-) long service loop on each end of cable.
Pulling Cable: Comply with BICSI ITSIM, Ch. 4, “Pulling Cable.” Monitor cable pull tensions.
UTP Cable Installation:
Comply with TIA/EIA-568-B.2.
Do not untwist UTP cables more than (12 mm) from the point of termination to maintain cable geometry.
Optical Fiber Cable Installation:
Comply with TIA/EIA-568-B.3.
Optical Fiber Cable may be terminated on connecting hardware that is rack or cabinet mounted.
Install cabling with horizontal and vertical cable guides in Telecommunications spaces with terminating hardware and interconnection equipment.
Suspend UTP cable not in a wire way or pathway a minimum of (200 mm) above ceilings by cable supports not more than (1524 mm) apart.
Cable shall not be run through structural members or in contact with pipes, ducts, or other potentially damaging items.
Installation of Cable Routed Exposed under Raised Floors:
Install cabling after the flooring system has been installed in raised floor areas.
Coil cable (1800 mm) long not less than (300 mm) in diameter below each feed point.
Group connecting hardware for cables into separate logical fields.
Separation from EMI Sources:
Comply with BICSI TDMM and TIA/EIA-569-B for separating unshielded copper voice and data communication cable from potential EMI sources, including electrical power lines and equipment.
Separation between open communications cables or cables in non-metallic raceways and unshielded power conductors and electrical equipment shall be as follows:
- Electrical Equipment Rating Less Than 2 kVA: A minimum of (127 mm).
- Electrical Equipment Rating between 2 and 5 kVA: A minimum of (300 mm).
- Electrical Equipment Rating More Than 5 kVA: A minimum of (610 mm).
Separation between communications cables in grounded metallic raceways and unshielded power lines or electrical equipment shall be as follows:
- Electrical Equipment Rating Less Than 2 kVA: A minimum of (64 mm).
- Electrical Equipment Rating between 2 and 5 kVA: A minimum of (150 mm).
- Electrical Equipment Rating More Than 5 kVA: A minimum of (300 mm).
Separation between communications cables in grounded metallic raceways and power lines and electrical equipment located in grounded metallic conduits or enclosures shall be as follows:
- Electrical Equipment Rating Less Than 2 kVA: No requirement.
- Electrical Equipment Rating between 2 and 5 kVA: A minimum of (76 mm).
- Electrical Equipment Rating More Than 5 kVA: A minimum of (150 mm).
Separation between Communications Cables and Electrical Motors and Transformers, 5kVA or HP and Larger: A minimum of (1200 mm).
Separation between Communications Cables and Fluorescent Fixtures: A minimum of (127 mm).
a) Install grounding according to BICSI TDMM and as per specifications.
b) Comply with ANSI-TIA-EIA-607.
c) Locate grounding bus bar to minimize the length of bonding conductors.
d) Fasten to wall allowing at least (50-mm) clearance behind the grounding bus bar. Connect grounding bus bar with a minimum 21 mm2 grounding electrode conductor from grounding bus bar to suitable electrical building ground.
e) Bond metallic equipment to the grounding bus bar, using not smaller than 13mm2 equipment grounding conductor.
Telephone Cabling Identification
Identify system components, wiring, and cabling complying with TIA/EIA-606-A and as per the specifications.
Colour-code cross-connect fields.
Apply colors to voice and data service backboards connections, covers, and labels.
Using cable management system software specified in Part 2, develop Cabling Administration Drawings for system identification, testing and management.
Use unique, alphanumeric designation for each cable and label cable, jacks, connectors, and terminals to which it connects with same designation. At completion, cable and asset management software shall reflect as built conditions.
Paint and label colors for equipment identification shall comply with TIA/EIA-606-A for Class 2 level of administration, including optional identification requirements of this standard.
Cable Schedule: Post in prominent location in each equipment room and wiring closet.
List incoming and outgoing cables and their designations, origins, and destinations.
Protect with rigid frame and clear plastic cover. Furnish an electronic copy of final comprehensive schedules for Project.
Cabling Administration Drawings: Show building floor plans with cabling administration-point labelling.
Identify labelling convention and show labels for telecommunications closets, backbone pathways and cables, entrance pathways and cables, terminal hardware and positions, horizontal cables, work areas and workstation terminal positions, grounding buses and pathways, and equipment grounding conductors.
Follow convention of TIA/EIA-606-A.
Furnish electronic record of all drawings, in software and format selected by Owner.
Cable and Wire Identification:
Label each cable within (100 mm) of each termination and tap, where it is accessible in a cabinet or junction or outlet box, and elsewhere as indicated. Each wire connected to building-mounted devices is not required to be numbered at device if color of wire is consistent with associated wire connected and numbered within panel or cabinet.
Exposed Cables and Cables in Cable Trays and Wire Troughs: Label each cable at intervals not exceeding (4.5 m).
Label each terminal strip and screw terminal in each cabinet, rack, or panel.
Individually number wiring conductors connected to terminal strips, and identify each cable or wiring group being extended from a panel or cabinet to a building mounted device shall be identified with name and number of particular device as shown.
Label each unit and field within distribution racks and frames.
Identification within Connector Fields in Equipment Rooms and Wiring Closets:
Label each connector and each discrete unit of cable-terminating and connecting hardware.
Where similar jacks and plugs are used for both voice and data communication cabling, use a different color for jacks and plugs of each service.
Uniquely identify and label work area cables extending from the MUTOA to the work area. These cables may not exceed the length stated on the MUTOA label.
Labels shall be pre-printed or computer-printed type with printing area and font color that contrasts with cable jacket color but still complies with requirements in TIA/EIA-606-A.
Cables use flexible vinyl or polyester that flex as cables are bent.
Field Quality Control
The contractor shall submit to the consultant the manufacturing and shipment schedules for all equipment and/or materials at least one month prior to the time of packing for shipment as long as the lead time available is sufficient or such shorter period as may fit the actual circumstances.
Should the consultant representatives fail to attend on the specified date for inspection; the Contractor shall proceed with shipment and carry out the relevant tests itself.
Contractor shall provide the consultant a copy of the recorded factory results made under its cognizance before shipment.
If the test results show that the equipment and/or materials do not comply with the Specifications, such non-complying equipment and/or materials shall be rejected and shall not be shipped until repaired or replaced and tested again. In such case, the contractor shall be held liable for any resulting delay.
In all cases, the contractor shall be responsible for the compliance of his equipment and materials with the contract’s specifications.
Testing: On installation of system components, demonstrate product capability and compliance with requirements.
Test each signal path for end-to-end performance from each end of all pairs installed.
Remove temporary connections when tests have been satisfactorily completed.
Correct malfunctioning units at project site, where possible, and retest to demonstrate compliance; otherwise, remove and replace with new units and retest.
Preparation for acceptance (prior to final inspection):
Temporary and old systems, facilities and utilities shall be properly disconnected, removed and disposed of off-site.
All systems, equipment and devices shall be in full and proper adjustment and operation, and properly labelled and identified.
All materials shall be neat, clean and unmarred and parts securely attached.
Test reports of each system component shall be complete and available for inspection.
Testing shall be carried out by a certified testing supervision as stated under the contract. Engage qualified testing agency to evaluate cables
Factory Acceptance Tests
Factory Acceptance Tests shall be carried out in a hardware and software environment, which simulates the final configuration of the system.
The contractor shall carry out any Factory Acceptances Tests, in Manufacturer’s factory itself, before any site delivery, in order to show to the consultant that the system of both hardware and software and the system after integration of various sub-systems is able to satisfy site technical requirements of the equipment specifications.
Some of the functional or performance tests, which cannot be conducted in a simulated environment, due to their nature and complications, may subject to the consultant approval be combined with the On Site Tests.
Following the methodology presented in the Test Plan, all tests are to be carried on according to Test Specifications, which are submitted by the Contractor and approved by the consultant.
The tests are to cover every aspect related to the specification of the system and its operation; including, but not limited to, visual inspections, measurements, and operation.
All Factory Acceptance Tests need to be carried out in the presence of the consultant unless otherwise agreed by the consultant. The Consultant will sign off the testing document on satisfactory completion of the tests.
Factory Acceptance Test Specifications, at every level, shall be subject to configuration management and change control by the Contractor.
The results of the Factory Acceptance Tests, together with any re-testing as a result of failure, shall be recorded and signed by the authorized personnel of the Contractor and the consultant.
Equipment is to be tested for quality and operation at the factory, and test certificates and reports, certified by an official testing authority, are to be submitted to the consultant before dispatch of equipment to site.