supply of twisted 20 pair pvc switch & other items. , supply of twisted 20 pair pvc switch board cable, conductor of size 0.6mm. dia annealed cop per conforming to irs-tc- 24/91 or itd 1138 or latest-20 pair. [ warranty period: 30 months after the dat e of delivery ] ] , supply of polythene insulated polythene sheathed jelly filled, armored, telephone cable with poly-a1 moisture barrier size: 10 pair,0.5mm conductor diameter as per rdso specn. no.irs tc 41/97 amn d. no.2or latest. [ warranty period: 30 months after the date of delivery ] ] , supply of 50 pair pijf cable 0.63mm copper conductor armored cable make: usha martin or s uperior. [ warranty period: 30 months after the date of delivery ] ] , supply of twisted 10 pair pvc switch board cable, conductor of size 0.6 mm dia annealed co pper conforming to irs/tc 24/91 or itd 1138 or latest-10 pair. [ warranty period: 30 months after the dat e of delivery ] ] , supply of 20 pair pijf cable 0.63mm armored cable make: usha martin or superior. [ warrant y period: 30 months after the date of delivery ] ]