supply of modemmodem,supply of modem (e1-rs232 modem/voice modem) of deltron make universal fail safe block interface (ufsbi) equipment as per irs:s-104/2012, ver 0 or rdso spec. no. irs:s-105/2012, ver. 0 with la test amendments, suitable with existing installations of ranchi division. make-m/s deltron equipment an d systems pvt. ltd.-kolkata. note #1) quantity distribution of modem out of total requirement: e1-rs2 32 modem-20 nos. and voice modem-10 nos. note# 2) item must be compatible with existing deltron mak e ufsbi system to work on backup media ofc (via unframed e1-2 mbps from stm interface) working volta ge 24 vdc (+/- 20%), & operating temperature:- 10 deg. c to +70 deg. c. [ warranty period: 30 months after the date of delivery ] ]