BP250 used Rasc now BMS MD110 Uses Fiol and Win Fiol Unfortunately having worked in the field for 21 years . I must ay that the BP250 if installed properly with card of the right revisions for compatibility issues is propably the best equiped small / Med PABX in the market having evolved
from the BP150 only little probs doesnt . Only if the card rvisions are wrongly matched it can cause problems. MD110 propably the most reliable PABX on the market its only down fall is ericsson waits to long before introducing new products(eg compare Call Centre Solidus Nortel Simposium) much to late. These 2 PABX will propably remain upgradeable
for a long time.
