2.2.8. ISDN port.
According to the UIT-T, the Integrated Services Digital Network (ISDN) can be defined as a
network that has evolved from the Integrated Digital Network (IDN), and which provides end-to-
end digital connections to deliver a wide range of services, both voice and other types, and
which users access through a set of standardized interfaces.
It can thus be said that it is a network that is an outgrowth of the existing telephone network and
that, because it offers end-to-end digital connections, enables the integration of a multitude of
services in a single access, regardless of the nature of the information to be transmitted and of
the terminal device that generates it.
The connector employed is a standard RJ45 for the S interface and a standard RJ11 for the U
interface.
2.2.9. Power supply.
Mains input connector(s), including fuse and fuseholder.
Power supply: universal 90 - 240 V AC, 50-60Hz. 15 VA. IEC 3 pin connectors
The unit can include two internal power supplies, one of them working as redundant of the other
one.
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