Most of the solutions can support voice, data, and video applications (although high-speed
video over copper is not optimal). Layer 1??“based solutions can naturally support E-LINE
services only, and one has to look at solutions such as Bridging, MPLS, and Wireless
mesh (FSO) for delivering E-LAN services. This point is notable and practically necessitates
Layer 1 solutions to coexist with other solutions, if the gamut of Ethernet services
are to be provided. Circuit emulation over Ethernet is yet another area that is still
being developed for most of the packet-based solutions (in case of TDM-based solutions,
of course, this consideration is often moot). Tables 16.1 and 16.2 summarize the solutions
with respect to supporting standardized services.
Scalability The Scalability attribute basically identifies whether a Service Provider can
minimize its delivery cost structure by leveraging its available bandwidth over a large
5 There is a degree of subjectivity involved here; however, the same level of subjectivity is enforced
across the gamut of solutions thereby ???normalizing??? the assessment. Note also, this exercise assumes
mainstream commercial solutions in each of the solution categories.
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