Black Box Series 5000 Reference Manual page 23

ISDN Connection Management
Auto-Call (Time-of-Day Connections)
An Auto-Call connection is an ISDN connection that is established each time the router attempts to start the
link. This starting of the links occurs each time an router powers up or when the link goes through a restart or
at the times specified by the Time-of-Day Activation Schedule. An Auto-Call connection would be used for a
static WAN configuration that needs to be maintained at all specified times between sites.
Network B
This ISDN connection is made
Network A
upon initial power-up and
is maintained during the
times defined in the
time-of-day schedule.
Figure 2 - 1 Auto-Call WAN Topology
The semi-permanent connection that results from an Auto-Call configuration means that the router will attempt
to maintain a connection to the partner router during the times specified in the Time-of-Day Schedule. When
Connection Management is enabled, the ISDN call to the Auto-Call number may be suspended during periods
of inactivity.
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