... the functions of automatic telephone, commanding attemper, PA, G/A and talk-back, etc. The terminal equipments have more ... backup configuration for main FEATURESEmergency paging with alarm interruptG/A, F/A alarmLoud-hailing SSB, VHF monitor speaker follow meAutomatic answer ... ) VHF wireless remote paging (optional)TECHNICAL DATADigital coding: A rule 2.048Mb/S PCM systemRing voltage: 75±10V 25 ...