Cabletron Systems Cabletron CyberSWITCH CSX400 - Manual (Page 29)

About the CSX400
CSX400 and CSX400-DC User’s Guide 15
ISDN Back-up
The ISDN back-up feature provides a back-up link for a remote site or branch office when one or
more primary WAN interfaces for a frame relay circuit or a nailed-up PPP connection fails. The
WPIM-S/T serves as the backup medium for this primary connection. The WPIM-S/T uses the
ISDN interfaces to back-up any primary interfaces which have been configured for ISDN back-up.
Time to Connect, Time to Disconnect, Connect Retries, Back-up Override, Input Idle Time-out
and Output Idle Time-out, are the six back-up parameters used to manage the ISDN Back-up
feature on the CSX400, and are described as follows:
Time to Connect — Time to Connect allows you to configure the amount of seconds the primary
interface can be in a failed state, before attempting to switch over to the back-up interface.
Time to Disconnect — Time to Disconnect allows you to configure the amount of seconds the
restored primary interface must remain connected, before attempting to switch over from the
back-up interface.
Connect Retries — Connect Retries allows you to configure the number of tries to restore the
back-up interface, before giving up.
Backup Override — Backup Override forces the back-up interface to remain connected, and
does not allow the back-up interface to switch back to the primary interface, even if the primary
interface is restored.
Input Idle Time-out — Input Idle Time-out allows you to determine the amount of time necessary
for data packets to be received, before the interface is automatically disconnected.
Output Idle Time-out — Output Idle Time-out allows you to determine the amount of time
necessary for data packets to be transmitted, before the interface is automatically disconnected.