2BASE-TL, for example, can initialize at rates from 192Kbps thru 5696Kbps, in
increments of 64Kbps, depending on the line length and quality. This speed is very beneficial
in outside plant copper loops to homes and businesses where the quality and length
of the cable vary greatly, and ???replacing the cable??? is not an option. But at the end of the
day, the speed of the service depends on the quality and length of the cable. Deployment
plans must utilize the rate-reach trade-off for Mid-Band Ethernet services.
Limitations of 10PASS-TS
10PASS-TS is a great technology for very short reach, asymmetric applications.
Delivering residential triple-play data+voice+video services is a perfect application.
Typical data and video services for residential users are highly asymmetric, with much
more downstream bandwidth required. And with the advent of high-definition video
signals, downstream bandwidth requirements are generally at least 20??“30 Mbps.
Using a VDSL2-based implementation can deliver these speeds at a few thousand
feet. Carriers are generally deploying this technology from an RT so the copper loops
Copper 141
can be kept less than a few thousand feet and then feeding the RT with optical connectivity.
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