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2.3
Connecting the PABX to the ISDN network of the
network service provider
The following diagrams illustrate the three connecting options for the PABX to
the external ISDN connection. If there are more than one external ISDN
connections, different connecting options are available. If more than two
external ISDN connections are to be interfaced, these must be hard-wired to
the NT.
Direct ISDN connection using the ISDN connecting cord supplied with the
system at the network termination (NT) is shown in Figure 16. This connection
option is possible for PABX and multipoint connections. The switches for the
terminators in the elmeg C46e must be closed.
Fig. 16: One ISDN connection
Connection to an ISDN jack supplied by the network service provider down-
circuit of the NT is shown in Figure 17. This connection option is possible for
PABX and multipoint connections. Observe the interfacing for the terminators
(see Fig. 18)
Fig. 17: One ISDN connection
NT
Two ISDN connections
NT
1
2
3
4
5
6
Two ISDN connections
28
NT
NT
NT
NT
1
2
3
4
5
6
1
2
3
4
5
6
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