2N Omega Lite - Installation Manual v1.9 - Manual (Page 12)

12
Note:
J18 – the connector is intended for connecting the PBX with a PC. It thus allows
the programming of the PBX using the program OMEGA Lite - PROGRAM, detailed
display of operation using program OMEGA Lite - PANEL, for connection of XAPI
Server, etc.
The serial port includes an insulating DC/DC converter of its own and, by
optical signal transmission, provides galvanic isolation of the serial port from the
PBX with a guaranteed insulation strength of 500 V.
This solution has the following advantages:

Helps transmit data over long distances

Improves data transmission reliability (resistance to disruption)

Enables communication with a PC powered from a different power supply section
(for example, from a different phase or central UPS)

Improves overvoltage resistance of the input
For connection with a PC, especially over a greater distance, a normal (i.e., cross-
over) four-wire telephone cord with RJ-12 terminals is normally used instead of a
specia
l “serial cable”.