Configure ISDN interfaces
Digi TransPort User Guide 231
Advanced ISDN parameters
These are the advanced settings for the ISDN interface.
Metric:
The connected metric of the mobile interface. The default metric of a connected interface is 1.
By allowing the interface to have a higher value (lower priority), static routes can take
preference to interfaces. For normal operation, leave this value unchanged.
Enable "Always On" mode of this interface
On
Configures the PPP instance so that if the router is disconnected, it tries to reconnect again
after approximately 10 seconds or dictated by the Configuration > Network > IP Routing/
Forwarding > IP Routing > When an "Always On" route becomes "In Service", wait n
seconds before using it parameter.
On and return to service immediately
This is similar to the above parameter. If you enable this parameter, the router will try and
connect immediately and without delay.
Put this interface "Out of Service" when an always-on connection attempt fails
Usually, the always-on interfaces do not go out of service unless they have connected at least
once. When this option is turned On, the interface goes out of service even if the first
connection attempt fails.
Attempt to re-connect after n seconds
The length of time, in seconds, the router will wait after an always-on ISDN connection has
been terminated before trying to re-establish the link.
If an inhibited PPP interface is connected, attempt to re-connect after n seconds
The value of this parameter takes precedence over Configuration > Network > Interfaces >
ISDN > ISDN Answering > Advanced > Wait n seconds after power-up before activating
this interface when some other PPP that is usually inhibited by this one is connected. This
parameter typically reduces the connection retry rate when a lower priority PPP is connected.
Wait n seconds after power-up before activating this interface
If this parameter is not set to 0, this is the initial delay after power up before the PPP is
activated. After that, the usual always-on activation timers apply.
Control when this interface can connect using Time band n
The Time Band number to use for this ISDN instance (see Configure time bands on page 488).
Keep this interface up for at least n seconds
If you set this parameter to a non-zero value, ISDN will not close the connection for the
specified period, even if the link is inactive.
Close this interface
After n seconds
The maximum time that this ISDN Interface may remain connected during any one session.
After this time, the ISDN link is deactivated.
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