ONE300 – Installation Manual
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4.6 T0/S0 Digital Interface (ISDN BRI)
The ONE300 supports 8 S0/T0 ISDN interfaces. The interfaces can be configured in
TE or NT.
The ONE300 can receive a BRI module that has 8 digital interfaces. The connection
of the digital voice interface is carried out on the rear panel via RJ45 connectors (1
connector per interface).
4.6.1 Safety Level of T0/S0 Interface
The T0/S0 modules marked ISDN BRI offer up to 8 ISDN (BRI) interfaces (RJ45
connector). These interfaces are TNV-1.
The factory configuration of these interfaces is T0, NT mode. Do not
connect the interfaces to a public ISDN access without adapting jumper
position, which can damage the product immediately.
4.6.2 Connector Pinout
The connection to the access voice interface is made on the rear panel via an RJ45
connector. The connector pinout is as follows:
Pin Signal Pin Signal
1 NC 5 TX (-)
2 NC 6 RX (-)
3 RX (+) 7 NC
4 TX (+) 8 NC
4.6.3 Jumper Setting
Every ISDN interface has four jumpers making it possible to configure the following
options:
• 100 Ohms impedance adaptation,
• Power-feeding for ISDN phones
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