- Supply TypeManufacturer, Exporter, Supplier, Retailer
- Preferred Buyer Location All over the world
Ring signal/polarity reversal Working status indicator/signal strength indicator Caller-ID Display/DTMF dialing RJ-11 socket to connect with the billing system for metering 4 channel /8 channel/GSM gateway SIM card supported(1.8V, 3V) Antenna socket(SMA) Easy connection with an ordinary telephone set, call back system.