Cusam STRAIGHT-WAY INTERCOM User Manual page 13

Ⅵ、
Attentions
● The video and audio indoor extension phone can be used
both in networking and non-networking system.It's good for
non-networking upgrading to networking system.
● If the door station promotes to the networking system, then
just replace the control chip of the non- networking door station
● The non- networking system promoting to the networking
system needn't to change the wiring of the original unit, and the
networking (networking system is called floor controller) and
the non- networking system have the same wiring from the door
station to the module and indoor phones.
★ The wiring request of non- visible partial
ⅰ、The section area should be bigger than 0.3mm
of main line is less than 50M
ⅱ、The section area should be bigger than 0.5mm
of main line is between 50M and 100M,
ⅲ、The section area should be bigger than 0.15mm
length of branch line is less than 20M,
ⅳ、The section area should be bigger than 0.3mm
of branch line is between 20M and 50M,
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