| http://www.w3.org/ns/prov#value | - Each PHY device is then connected through a physical communications medium to an end user device (not shown). [0054] Moreover, in an embodiment of the invention, ON 400 has other interfaces (not shown), to support different kinds of traffic, such as voice, and/or to support circuit emulation. [0055] B. Operational efficiency [0056] 1.
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