Main Functions:
1) Suitable for GSM 900/1800MHz, using SIM card, Support 8 SIM cards
2) Make and answer calls after connecting to telephone set
3) Available to connect with telephone set, PBX, Billing machine, etc
4) Caller ID
5) Built-in PIN code protection for locking device/card/network
6) Support redialing and hands-free
7) Support voice adjustment and multi-lever volume to be chosen
8) Optional to match with various high-gain antennas
9) The indicators for signal intensity, working status, breakdown and so on
10) Setting up and modification of parameters through the phone set

Features:
based on GSM900MHz/1800MHz
Siemens TC35I GSM module
Support 8 SIM cards
Support reverse polarity
Connect to PBX

Technique Parameters:
Working Frequency
Rx(EGSM 900): 925~960MHz
Tx(EGSM 900): 800~915MHz
Rx(DCS 1800): 1805~1880MHz
Tx(DCS 1800): 1710~1785MHz
Antenna Plus: >3dB