IP Phone Expansion - 4 Extensions

This phone expansion key enables 4 additional local IP phone extensions on all QX systems The QX20 can go up to a maximum of 32 total IP extensions The QX50 can go up to a maximum of 48total IP extensions The QX200 can go up to a maximum of 200 total IP extensions The QX500 can go up to a maximum of 500 total IP extensions The QX2000 can go up to a maximum of 2,000 total IP extensions