Aastra OpenCom 510 User Manual page 45

Interfaces and Connectible Terminals
Bus Configuration: OpenCom 510 at the End of an S
If a OpenCom 510 is connected at the end of an S
the relevant S interface cards must be activated.
0
In a typical configuration, the OpenCom 510 will be connected to the network ter-
mination for basic access (NTBA) with an externally switched S
terminating resistors of the interface card are activated in the default setting.
OpenCom 510
IAE IAE
MX+S01-8: Terminating resistors activated
One end of the S
0
resistors must be activated (DIP switches set to "on").
IAE = ISDN socket (German: "ISDN Anschluß Einheit") or ISDN terminal.
TR = Terminating Resistor, the S
the line. This can also be done by an appropriately wired IAE.
1a TR
1b
2a TR
2b
Termination on an ISDN socket
The illustration Termination on an ISDN socket shows an IAE with integrated termi-
nating resistors.
Bus Configuration: OpenCom 510 in the Middle of an S
If a OpenCom 510 is connected in the middle of an S
resistors of the relevant S
1. Remove the interface card by following the instructions in Installing Interface
Cards starting on page 31.
TR
bus is terminated by the OpenCom 510; the terminating
termination. The TR must be at the termination of
0
interface cards must be deactivated.
0
Bus
0
bus, the terminating resistors of
0
port; therefore, all
0
Bus
0
bus, the terminating
0
S Ports
0
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