2. Making & answering calls after connecting to telephone set 3. With 2 RJ-11 phone ports / 1 RJ-11 phone port & 1 PSTN port (optional) 4. Available to connect with telephone set, PBX, billing machine, etc 5. Available to connect with backup battery (optional) 6. Built-in PIN code protection featured with locking device/card/network 7. Optional to match with various high-gain antennas, featured with signal intensity indicator, Working status indicator, breakdown indicator, etc 8. Supports the functions of redialing and hands-free 9. Can proceed with setting up and modification of parameters through the phone set.
Technique Parameters: Working Frequency: GSM 850/900/1800MHz/1900MHz Working Voltage: DC5V/DC12V User Access Port: Dialing tone frequency: 450Hz continued Busy tone frequency: 450Hz 0.35s/0.35s