Chapter 7 Variable switching of S0 interfaces
7.1 Switching the S0 interfaces from external to in-
ternal
The devices
bintec R1200
,
bintec R3000
and
bintec R4100
have two or four BRI connec-
tions. All BRI connections can be operated as internal or as external S0 connections. The
external S0 connections are used for connection to the network operator's ISDN network.
The internal S0 connections are provided for connecting various ISDN terminals
(telephone, PC, etc.). In the ex works state, the BRI connections are configured as external
connections.
The two S0 interfaces BRI-1 and BRI-2 can be switch from external (ex works state) to in-
ternal via a link plug field on the PCB for the device. Additional interfaces BRI-3 and BRI-4
can be switched via the link plugs on the side of the ISDN-L module.
If you use a S0 interface as an internal connection, you can specify for each interface
whether or not the connection is powered via your device when the conncted terminal does
not have its own power supply. The respective link plugs must be moved to do this.
In addition, you can switch the 100 Ohm terminators on/off for each interface via additional
link plugs. You require terminators:
• if you connect an external connection directly with the external NTBA
• for a point-to-point connection
• if the bus starts directly with the connection of your device
You can also connect the interfaces BRI-3 and BRI-4 to each other. This can guarantee the
power supply for a terminal on an BRI interface switched to internal mode in the event that
your device is switched off or the power supply fails. For example, an external S0 can be
placed on an internal S0. In this case, an idle relay loops through from external S0 to in-
ternal S0 and so creates an emergency supply for the internal S0 bus/telephone.
Warning
Always remove the power cord before opening the device. This is the only way of en-
suring that the internal mains unit is completely dead. If you do not remove the power
cord, there is a risk of injury or death.
Note that the device should only be opened by trained service personnel.
7 Variable switching of S0 interfaces
Funkwerk Enterprise Communications GmbH
66
R1xxx/R3xxx/R4xxx
