Enterasys sbu128 Betriebsanweisung
SBU128
User Manual
80-10200000-01
1–4
1.3 Product Overview
This user manual is arranged to take you through the basics of the
hardware, then to software set-up and on to the more specialised user
definable software facilities of your SBU128.
hardware, then to software set-up and on to the more specialised user
definable software facilities of your SBU128.
SBU128 software configuration is generally not a complex operation. In
many applications once you have correctly configured the hardware and
installed your SBU128s, the default software configuration settings will
suffice to provide reliable backup operation.
many applications once you have correctly configured the hardware and
installed your SBU128s, the default software configuration settings will
suffice to provide reliable backup operation.
In this section there is a brief overview of many of the more specialised,
software configurable, features of your SBU128. Each topic is dealt with
in detail later in this manual.
software configurable, features of your SBU128. Each topic is dealt with
in detail later in this manual.
1.3.1 Network Security
Your SBU128 contains an integral security facility, designed to protect it
from being accessed by unauthorised users via the ISDN.
from being accessed by unauthorised users via the ISDN.
If the security option is enabled (ANSWER is set to CLID), the answering
SBU128 will only accept a call originating from an ISDN number
matching one of those stored in its file of telephone numbers.
SBU128 will only accept a call originating from an ISDN number
matching one of those stored in its file of telephone numbers.
1.3.2 Telephone Number Storage
The non volatile memory will store up to 20 telephone numbers, allowing
you to select a backup telephone number for any particular circuit.
Alternative numbers can be dialled in the event of an unsuccessful call.
you to select a backup telephone number for any particular circuit.
Alternative numbers can be dialled in the event of an unsuccessful call.
1.3.3 Circuit Failure
Your SBU128 can detect a circuit failure if it detects any of the following
conditions:
conditions:
•
No data is received from the DLC.
•
No clock is detected on the link.
•
The I/DSR signal from the DLC NTU goes to the OFF condition.
•
The C/DTR signal from the User DTE equipment goes to the ON
condition.
condition.
User selectable time-outs can be independently set for all of the
detection facilities mentioned, except C/DTR from the DTE.
detection facilities mentioned, except C/DTR from the DTE.