supply of supply of ssbpac (digital) for single line , supply of ssbpac(digital) for single line as per rdso specification no.rdso/spn/175/2 005 ver.-1, along with station master block panel along with dtmf based electronic block bell & block telephone equipment as per specification no rdso/spn/191/2005(ver. 0), microprocessor lighting & s urge protection devices for power line 24 dc class-c, lighting & surge protection devices for data lin e class-d,ekt for shunt key as per drg. no. sa-22601/alt.4 & irs: s-21/2001 and associated data cabl e including wired relay rack without relays. (required relays for this item will be supplied by railways) [ warranty period: 30 months after the date of delivery ] ] , supply of ssbpac(digital) for single line as per rdso specification no. rdso/spn/175/2 005 ver.-1, along with station master block panel along with dtmf based electronic block bell & block telephone equipment as per specification no rdso/spn/191/2005(ver. 0) , microprocessor lighting & surge protection devices for power line 24 dc class-c, lighting & surge protection devices for data li ne class-d,ekt for shunt key as per drg. no. sa-22601/alt.4 & irs: s-21/2001 and associated data cab le including wired relay rack without relays. (required relays for this item will be supplied by railways) [ warranty period: 30 months after the date of delivery ] ] , supply of ssbpac(digital) for single line as per rdso specification no. rdso/spn/175/2 005 ver.-1, along with station master block panel along with dtmf based electronic block bell & block telephone equipment as per specification no rdso/spn/191/2005(ver. 0) , microprocessor lighting & surge protection devices for power line 24 dc class-c, lighting & surge protection devices for data li ne class-d,ekt for shunt key as per drg. no. sa-22601/alt.4 & irs: s-21/2001 and associated data cab le including wired relay rack without relays. (required relays for this item will be supplied by railways) [ warranty period: 30 months after the date of delivery ] ] , supply of ssbpac(digital) for single line as per rdso specification no. rdso/spn/175/2 005 ver. 1,along with station master block panel along with dtmf based electronic block bell & block telephone equipment as per specification no rdso/spn/191/2005(ver. 0), microprocessor lighting & s urge protection devices for power line 24 dc class-c, lighting & surge protection devices for data lin e class-d,ekt for shunt key as per drg. no. sa-22601/alt.4 & irs: s-21/2001 and associated data cabl e including wired relay rack without relays. (required relays for this item will be supplied by railways) [ warranty period: 30 months after the date of delivery ] ] , supply of ssbpac(digital) for single line as per rdso specification no. rdso/spn/175/2 005 ver.-1, along with station master block panel along with dtmf based electronic block bell & block telephone equipment as per specification no rdso/spn/191/2005(ver. 0), microprocessor lighting & s urge protection devices for power line 24 dc class-c, lighting & surge protection devices for data lin e class-d,ekt for shunt key as per drg. no. sa-22601/alt.4 & irs: s-21/2001 and associated data cabl e including wired relay rack without relays. (required relays for this item will be supplied by railways). [ warranty period: 30 months after the date of delivery ] ]