Aastra OpenCom 510 User Guide - Page 44

Bus Configuration: OpenCom 510 at the End of an S

Page 44 highlights

Interfaces and Connectible Terminals S0 Ports Bus Configuration: OpenCom 510 at the End of an S0 Bus If a OpenCom 510 is connected at the end of an S0 bus, the terminating resistors of the relevant S0 interface cards must be activated. In a typical configuration, the OpenCom 510 will be connected to the network termination for basic access (NTBA) with an externally switched S0 port; therefore, all terminating resistors of the interface card are activated in the default setting. ON 12 OpenCom 510 TR IAE IAE MX+S01-8: Terminating resistors activated One end of the S0 bus is terminated by the OpenCom 510; the terminating resistors must be activated (DIP switches set to "on"). IAE = ISDN socket (German: "ISDN Anschluß Einheit") or ISDN terminal. TR = Terminating Resistor, the S0 termination. The TR must be at the termination of 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 terminating resistors. Bus Configuration: OpenCom 510 in the Middle of an S0 Bus If a OpenCom 510 is connected in the middle of an S0 bus, the terminating resistors of the relevant S0 interface cards must be deactivated. 42

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Interfaces and Connectible Terminals
S
0
Ports
42
Bus Configuration: OpenCom 510 at the End of an S
0
Bus
If a OpenCom 510 is connected at the end of an S
0
bus, the terminating resistors of
the relevant S
0
interface cards must be activated.
In a typical configuration, the OpenCom 510 will be connected to the network ter-
mination for basic access (NTBA) with an externally switched S
0
port; therefore, all
terminating resistors of the interface card are activated in the default setting.
MX+S01-8: Terminating resistors activated
One end of the S
0
bus is terminated by the OpenCom 510; the terminating
resistors must be activated (DIP switches set to “on”).
IAE = ISDN socket (German: “ISDN Anschluß Einheit”) or ISDN terminal.
TR = Terminating Resistor, the S
0
termination. The TR must be at the termination of
the line. This can also be done by an appropriately wired IAE.
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
0
Bus
If a OpenCom 510 is connected in the middle of an S
0
bus, the terminating
resistors of the relevant S
0
interface cards must be deactivated.
12
ON
IAE
IAE
TR
OpenCom 510
1a
1b
2a
2b
TR
TR