for Expansion Port Networks (EPNs) which are remotely located
from the Processor Port Network (PPN) at a distance greater than
the range of a fiber connection (Five miles with multi-mode fiber
or 22 miles with single mode fiber.)
This solution may also be used if private right-of-way for a fiber
run cannot be achieved.
arrangement allows for the use of up to four T1 circuits to connect
the PPN and EPN.