Matrix ETERNITY Quick Start 11
The number of ISDN Terminals that can be connected on the BRI port configured in the NT mode
depends on the power consumed by the ISDN terminals.
From signaling point of view, up to 8 terminal equipment can be connected on the BRI port
configured in the NT mode. But the maximum power that can be fed to a single BRI port is 50mA.
So, connect ISDN Terminals to the BRI port according to the power consumed by them, which
together do not exceed 50mA.
• Insert the BRI card in any free Universal Slot and secure the card.
• Use the cable supplied for each connector on the BRI card to connect the BRI
Ports to the NT1 device supplied by your ISDN service provider. See the tables
below for configuration and pinout details.
Configuration of the U interface (RJ-45) at NT1
Configuration of the S/T interface (RJ-45) on NT1
Pin details of BRI Port in TE mode
Pin Number Pin Details
4 Tx
5 Rx
Pin Number Pin Details
3 Rx1
4 Tx1
5 Tx2
6 Rx2
Pin Number Signal Color
1 -- Orange-White
2 -- Orange
3 TX-A Green-White
4 RX_A Blue
5 RX_B Blue-White
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