CAPACITY:
Fixed 4x16 or expand from 4x16 to 4x24,4x32,6x16,6x24,6x32,8x16,8x24,8x32

MAIN FEATURES:

-Built-in PC Program & Billing System;

-Caller ID;

- Built-in external Music;

- 3level DISA record total 20s or 1-level at 20s;

- Auto LCR to VOIP,GSM ,CDMA

-Class of Service;

- Optional switch Power or Backup Card;

- Conference Call

- Call Foward on Busy /No-answer

- Power failure Transfer.

- High reliability for thundering protection;

- High reliability for CO Line/Extension protection;