The QB2 Server supports up to 50 IP Phones & 25 VoIP Lines with out the addition of hardware or software. With additional hardware modules, the QB2 may be equipped with Analog Telephone Line and Extension Ports. Available modules include:
- 2-Port Analog Telephone Line Module (FXO) – item # QBO2
- 2- Port Analog Extension Module (FXS), item # QBS2
- Combo Module with (1) FXO Port & (1) FXS Port, item # QBSO
Up to 4 modules maybe added to the QB2 Server.