Features:
1.Based on GSM 900/1800MHz or 850/1900MHz
2.Support reverse polarity
3.Can connect to PBX.
4.With PSTN port
5.Support GPRS (optional)
6.Support Call-transfer PSTNGSM

Main Functions:
1. Using SIM card
2. Making & answering calls after connecting to telephone set
3. Available to connect with telephone set, Billing machine, etc
4. Supports the functions of redialing and hands-free
5. Voice adjustment of calling in and out, multi-lever volume to be chosen
6. Caller ID
7. Featured with signal intensity indicator, working status indicator, breakdown indicator, etc
8. Built-in PIN code protection featured with locking device/card/network
9. Able to select calling out by GSM or PSTN.
10. Support call-transfer PSTN to GSM or GSM to PSTN: auto-transfer or by hand
11. Support connect Internet by GPRS. (optional)

Technique Parameters:
Working Frequency
Rx (EGSM 900): 925~960MHz
Tx (EGSM 900): 880~915MHz
Rx (DCS 1800): 1805~1880MH
Tx (DCS 1800): 1710~1785MHz
Power Consumption: