Enterasys csx400 Manuel De Montage

CyberSWITCH CSX400 and CSX400-DC Installation Guide

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A Network Terminator device (NT1) provides the interface between ISDN terminal (router) 
equipment and the ISDN service provider. In the U.S., the NT1 is provided by the customer; 
outside the U.S., the NT1 is provided by the ISDN service provider. The CSX400 supports the 
WPIM-S/T by providing an S/T interface that requires an external NT1. 

The following telephone switch types are supported within the U.S.:

Outside of the U.S. the following switch types are supported: (Future Release)

NET3 (European ISDN) 

NET3SW (European Swiss-variant) 

NTT (Nippon Telegraph and Telephone) 

KDD (Kokusai Denshin Denwa Co., Ltd.)

French Delta (VN4) switches

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 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 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 allows you to configure the number of tries to bring up the 

back-up interface, before giving up.

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.