Product IDSC-300 Features1. Based on GSM900MHz/1800MHz 2. Siemens TC35i GSM module 3. Support reverse polarity 4. Can connect to PBX 5. Support Fax Main Functions1. Making & answering calls after
connecting to telephone set 2. Send/receive faxes through connecting to fax machine 3. Available to connect with telephone set, PBX, billing machine, etc 4. Available to connect with backup
battery, and the stand-by time can reach 24 hours in case when the power is cut off. 5. Built-in PIN code protection featured with locking device/card/network 6. Caller ID 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.