It has below functions for model 323-2SD

1.       Work with GSM SIM card.

2.       Easy to be installed.

3.       Could store 4 access numbers.  ---new function!

4.       Could reroute use’s call after programming the specified access number and PIN codes. ---new function!

5.       Could set prefix go though or by pass the dialer. ---new function!

6.       support prefix removing function---new function!

7.       Intelligent auto pickup least cost route (LCR) function ---new function!

8.       Support four working mode:
a. carrier select mode
b. force carrier select mode
c. call through wait for connection establish
d. call back

9.       No need to change user’s conventional dialing habit:
a. Support dial from the Contacts and phone book, no need to memorize and input the numbers.
b. Support dial directly from mobile phone's missed calls/ call record/ call history/ recent calls.

10.   Compatible with many mobile phones, Nokia, Motorola, Sony Ericsson, Samsung, LG, and so on. 

We could do OEM