Appendix A
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66
Simple copper-pair wire will require line drivers over long distances since attenuation is
high. Leased lines from the phone company should not require external amplification
devices.
Collisions
There is no data flow control provided in the transformer coupling. If a busy indication is
available, it can be connected to the COR input P3-6 of the unit.
If no busy indication is available, make sure the COR input is left at factory defaults, channel
busy on logic low, and that jumper JP10 is in the “B” position. This will enable the units to
transmit at all times.
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