1.supports Call ID, Call Restriction, Call Forward, Call Waiting 
2.widely used in payphone 
3.a computer by a RS232 cable

 Specifications:
1. Air interface:  CDMA 800Mhz frequencies

2. External in interface:
   The power supply interface: POWER / DC12V 
   Outside phone interface: RJ-11(PHONE) 
   Outside fax interface: RJ-11 (FAX) 
   The antenna interface: SMA (Male) 
   The data Service interface: SERIAL PORT

3. Power adaptor:
    Input voltage: AC90-260V / 50Hz 
    Output voltage: DC12V 
    Output current: 1.2 A
4. Backup battery:
    Ni-MH battery
    7.2V / 1.2A

5. Antenna:
   Frequency Band:
   890-960 MHz / 1710-1880 MHz 
   Gain: 2.5dBi 
   Wave ratio: ≤1.5 
   Input resistance: 50ohm. 
   Polarize method: perpendicularity polarizes

6. Dimensions(L*W*H) Average 226mmX226mmX551mm(not include the antenna)

7. Weight: 1200g (include the antenna, battery, power adaptor.)