Devolo MicroLink 56k Fun LAN, Руководство пользователя

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Appendix
17
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devolo MicroLink 56k Fun II
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EN
subscribers call Telekom at 0800/3301172, and residential subscribers
call 0800/3302000.
Find out whether any additional services are enabled for the analog
network, such as call charge metering, call waiting, etc. The signals sent
over your line by such services have little effect on voice calls. However,
they act as noise interference on a data line and should be disabled for
the duration of data connections. In apartment buildings especially, many
phone jacks are installed and used on many floors. Often, the
installations of these terminals are parallel, which is a code violation in
Germany. Germany's telephone networking codes require that the house
connection is nonreflecting at a specific impedance. Connecting several
devices having the same impedance in parallel reduces the total
impedance. This should be avoided as much as possible. A clean
technical solution to this is the so-called telephone toggle switches,
which prevent a second phone to listen in on an existing call, or small
branch exchange systems, which usually allow you to make in-house
calls as well.
The fast transfer protocols based on V.90 and 56kflex cannot be compared to
the classic modulation protocols. Unlike, for example, V.34, these protocols
are based on a different technology. In principle, the maximum achievable
speed is determined by the amount of available line bandwidth. This can vary
greatly from one line to the next and therefore, the actual connection speed
can vary significantly.