It is relatively easy to get no busy signal even if all your modem lines
are tied up, using a PABX with dozens of hunt lines all you do is just let
it keep ringing and eventually the MSDUN dialer will time out, the
customers ought to be asked whether they get connects every time not
whether they get busy signals. Secondly, I understood the ratio to be 10
users per modem. Not 8. The 8 is a digiboard or logical hardware facet not
the modem to user ratio is it ?