Supply of annuniciator multiway telephone exchange 5 lines with wooden box specification (a) general (i)no of extension 5/10 (ii) minimum no of extension in conference- 3 (iii) power supply requirement 12v dc, 1a(b) speech - send output @ 5mv more than 774 mv, side tone suppression @5mv less than 100mv, receiveoutput @ 193 mv more than 100 mv (c) calling system - output voltage in open condition more than 80v ac,frequency @ 25 hz. or with better specification, suitable for hand generator type magneto telephone as perrdso specification no irstc-36/97.
Supply of annuniciator multiway telephone exchange 5 lines with wooden box specification (a) general (i)no of extension 5/10 (ii) minimum no of extension in conference- 3 (iii) power supply requirement 12v dc, 1a(b) speech - send output @ 5mv more than 774 mv, side tone suppression @5mv less than
Telecommunication Stores Tenders