Справочник Пользователя для Netopia R2020
G-2 User’s Reference Guide
These new techniques treat the phone system as a mostly digital network that just happens to have an analog
por tion. There are several consequences to the reliance on a half-digital connection. Your Internet Ser vice
Provider must have digital phone lines to the public switched telephone network (PSTN). That's the easy par t: if
your ISP offers 56Kbps, they have the digital lines.
por tion. There are several consequences to the reliance on a half-digital connection. Your Internet Ser vice
Provider must have digital phone lines to the public switched telephone network (PSTN). That's the easy par t: if
your ISP offers 56Kbps, they have the digital lines.
Getting the most out of 56K technology requires that you have optimal conditions on your telephone line. Any
noise in the line will degrade your connection. Statistics show that most people connect somewhere between
45 and 50K. Many connect at 52K. Connect rates between 40 and 50K are in no way a failure on the par t of
the Internet Ser vice Provider, but simply a fact of life in tr ying to extend the limitations of noisy analog
telephone lines.
noise in the line will degrade your connection. Statistics show that most people connect somewhere between
45 and 50K. Many connect at 52K. Connect rates between 40 and 50K are in no way a failure on the par t of
the Internet Ser vice Provider, but simply a fact of life in tr ying to extend the limitations of noisy analog
telephone lines.
The Netopia R2020 ships with the unified ITU V.90 standard firmware, also known as V.PCM, which merges the
K56flex standard with the competing x2 standard. Modem firmware updates that may from time to time become
available will be made available on the Netopia website. See
K56flex standard with the competing x2 standard. Modem firmware updates that may from time to time become
available will be made available on the Netopia website. See