GSM PSTN terminal

GSM PSTN terminal 1.GSM 900/1800MHz, 850/1900MHz 2. Support PSTN connection. 3. Making & answering calls after connecting to telephone set 4. Can make phone calls via GSM or PSTN network by choice or according to the routing parameters pre-defined on the route 5. Available to connect with telephone set, PBX, Billing machine, etc 6. Caller ID 7. Supports the functions of redialing and hands-free 8. Voice adjustment of calling in and out, multi-lever volume to be chosen 9. Featured with indicators of signal intensity, working status, breakdown, etc 10. Can proceed with setting up and modification of parameters through the phone set 11. Built-in PIN code protection featured with locking device/card/network