User`s guide

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Configuration - Network > Interfaces > ISDN > ISDN
Answering > Advanced
These are the advanced settings for the ISDN interface.
Metric:
This parameter specifies 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
This parameter is used to configure the PPP instance so that in the event that it is
disconnected the unit will try 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
As above “On” but the unit will try and connect immediately and without delay.
Put this interface "Out of Service" when an always-on connection attempt fails
Usually, always-on interfaces will not go out of service unless they have connected at least
once. When this option is turned “On”, the interface will go out of service even if the first
connection attempt fails.
Attempt to re-connect after n seconds
This parameter specifies the length of time in seconds that the unit 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 would typically be used to reduce 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 will
activate. After that, the usual always-on activation timers apply.
Control when this interface can connect using Time band n
This parameter specifies the Time Band number to use for this ISDN instance (see
Configuration - Network > Timebands).
Keep this interface up for at least n seconds
If this parameter is set to a non-zero value, then ISDN will not close the connection for the
specified period, even if the link is inactive.
Close this interface
After n seconds
This parameter specifies the maximum time that this ISDN Interface may remain
connected during any one session. After this time, the ISDN link is deactivated.