InfiniSource ETC 100, Hardware Manual

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210 Infinisource
Modem Clocks
Due to possible problems when running a modem clock on some types
of phone systems, we require that only a “two wire” phone cable be
used with our clocks (as opposed to the standard “four wire” cable).
This prevents possible damage to the clock motherboard or modem due
to power running through the extra two wires. We have provided a two
wire phone cable with the clock. If you need longer cables, please use
this cable as a template to properly modify a standard four wire phone
cable, or you can purchase a new cable of sufficient length from Infini-
source.
If you have any questions, please call our Technical Support department
at (800)697-7010.
Ethernet Clocks
The Ethernet clock uses a standard Category 5 (CAT5) shielded network
cable. The clock comes with a 20 ft. cable. If a longer length is needed,
any standard CAT5 cable will work.