Port Assignment, Termination, Cable Length
46
Installation
Port Assignment, Termination,
Cable Length
S
0
Ports
All S
0
ports can be externally connected (i. e. on ISDN network terminations).
The S
0
2 port and all S
0
ports on additionally installed interface cards can also
be internally connected. Simultaneous use of one S
0
port as internal and
external port is not possible.
Whether you use switchable S
0
ports for internal or external communication
will depend on your individual communication requirements and the existing
basic connections.
Please note that the S
0
buses each require a terminating resistor of 100 ohms
at each end.
Check: Is the terminating resistor switched on in the NTBA? Forum 523/524’s
software is used to switch on the terminating resistor. You can adjust this
setting when configuring the S
0
ports in the
Configurator
on the Web
console.
Connect S
0
1 externally or S
0
2 externally to the NTBA (the default setting is
S
0
1 connected to multi-terminal access and S
0
2 connected to system access).
Use the ISDN connection cable provided. For the following example, activate
the
Telephony
:
Ports
:
S0(#)
:
Line termination
option in the
Configurator
. In
the NTBA, 100 ohms terminating resistors between 1a and 1b as well as
between 2a and 2b are required. There are no further devices connected to
the NTBA.
Summary of Contents for forum 523
Page 1: ...Forum 523 524 Mounting and Commissioning Manual ...
Page 10: ...8 ...
