... 30mA output current for payphone connection 2 SIM cards (SIM 1 + SIM 2), 3 standby channels (GSM A + GSM B + PSTN) 5 ... B auto switch, PSTN only, GSM/PSTN auto switch, GSM A only, GSM B only) White backlight LCD for parameters and information display Least ... directional) with 3 M (11.8US in.) wire 5dBi whip antenna is optional 7dBi Yagi antenna is optional quadband GSM Fixed wireless terminal with 3 ...