For a major service provider in Canada providing services both as an ILEC and CLEC, DS1 remains a
viable business—not a growth business, but one with a large number of circuits and operating efficiency
that helps DS1s remain profitable. Recently, however, demand for DS3 services both to and
beyond the demarc has become a more common service request. For this service provider, finding
solutions for these applications was not the challenge. The challenge was to deploy extended-reach
DS3 solutions today that would not threaten operating efficiency and network reliability as the
number of DS3 circuits in the network grows....