supply of slave telephone lc gate telephone system and supply of master telephone unit with voice logging facilityslave telephone lc gate telephone system and supply of master telephone unit with voice logging facility,slave telephone lc gate telephone system asper rdso spec. no - rdso/spn/tc-51/2011 (r ev.3.0 or latest)with amendment - 1. make brand - bentron power systems or similar. [ warranty period: 30 months after the date of delivery ] ] , supply of set of items: (a) master telephone unit with voicelogging facility for electronic lc gate telephone system as per specification no. rdso /spn/tc/51/2011 rev 3.0 or latest. (b) power supply system with mf battery of 12v/24v dc(12v dc supply shall be connected to the station telephone unit &2 4v shall be fed to line circuit) with maintenance free battery. make brand- bentron power system or simila r. [ warranty period: 30 months after the date of delivery ] ] => limited