The number of failed connections a modem can have in
a sampling period (specified elsewhere) before it will
be taken out of service. For example, if this number
is set to 8, and the sample count is set to 16, then a
modem that fai ls more than 8 out of its last 16
connection attempts will be taken out of service. 0
indicates that the modem will never be taken out of
service for this reason.