01) GSM 850MHz 900MHz 1800MHz 1900MHz / CDMA 450MHz 800MHz 1900MHz( Optional)
02) Standard PSTN FXS with RJ-11 to telephone or voip gateway & PABX
03) 400-500Hz Dial-tone and Busy-tone , Disconnect Tone
04) 50V in idle and 75V in ringing and 9-12V in talking
05) DTMF detector in RJ-11
06) Provide reverse polarity
07) Caller ID ( DTMF, after ONE Ring) to telephone or voip gateway or PABX
Caller ID ( FSK) to telephone or voip gateway & PABX( Optional)
08) One Number Unified( Optional)
09) CLIR( Calling Line Identification Restriction)
10) Separate Power On/ Off controller
11) LED indicating Hook On/ Off, Talking, Signal Intensity, Power On/ Off
12) Setable dialing delay time
13) Setable automatic dialing( Opertional)
14) Support to dial all number including of * # ( Opertional)
15) DTMF Automaticly dialing to GSM , to voip gateway , PABX( Optional)
16) SPK & MIC volume regulate( Optional)
17) Provide accumulator charger interface ( Optional)

18) Multiparty Calling teleconference ( Optional)
19) Setable Maxim talking time to warn of exchanger card ( Optional)
20) 4SIM Rotator Automaticly( Optional)
21) IMEI changing ( Optional)
22) Rasio Bases Changing Automaticly to simulate movement( Optional)

23) Simple to install and easy to maintain
24) Steady module & reliable design ensures good performance
25) Strong signals with high gain antenna
26) No noise & Clear voice
27) Suitable for wide voltage range & Low power consumption
28) Suitable for all kinds of weather & environment
29) Offer keypad command sets to define functions
30) Offer web sets to define functions remotely( Optional)