supply of supply of under ground pijf 20 pair , 0.5mm dia , 20 pair pijf cable: - solid polythene insulated fully filled, polythene sheathed 20 pairs pijf u nderground telecom cable with armored having 0.63mm dia. of each conductor as per tec gr no. gr/cu g-01/03 aug 2003 (tec standard: tec 68090: 2003) [ warranty period: 30 months after the date of de livery ] ] , supply of under ground pijf 20 pair , 0.5mm dia as per rdso spec no- irs tc-41/97 amndmt no 2 or latest. [ warranty period: 30 months after the date of delivery ] ] , supply of under ground pijf 20 pair , 0.5mm dia as per rdso spec no- irs tc-41/97 amndmt no 2 or latest. [ warranty period: 30 months after the date of delivery ] ] , supply of 20 pair cable 0.5mm conductor dia armoured pijf underground telephone cable as per rdso spec: irs/tc-41-97 amndt. no 1 to 3 or latest [ warranty period: 30 months after the date of d elivery ] ]