Fig. 6:
BUS-S Terminal resistance jumpers
Placing these terminal resistances in the correct position is important . Otherwise, it can lead to errors in data (or
voice), particularly if the “S” bus line is long.
• Only or the last terminal on the ISDN “S” bus
The P1 and P2 jumpers must be positioned (terminal resistance on) if the router is the only element connected to the
network terminal (NT1, TR1, etc.) or it is in the last position on the ISDN “S” bus. This is the configured default posi-
tion for the device.
Fig. 7:
Sole or last terminal
• Intermediate position on the ISDN “S” bus
The P1 and P2 jumpers must be off (without terminal resistance) if the router occupies an intermediate position on
the ISDN “S” bus.
Teldat S.A.
1 Installing the Router
ATLAS 50
5
