Modem / Isdn; What Is A Modem; Modem - Medion PC TITANIUM MD 8000 Getting Started Manual

M / ISDN
ODEM
This chapter is intended for systems equipped with a modem
or ISDN jack.
W M
HAT IS A
The term „modem" is an abbreviation of Modulator/ DEModula-
tor. A modem changes the bit stream of the PC into analog sig-
nals which then can also be transmitted via the telephone line
(modulation). The modem on the other side reverses the con-
version (demodulation). Simplified, a modem converts outgoing
data into tone and tone incoming via the telephone line back
into data.
The built-in modem is able to receive data according to the ITU
standard for V.90 transmissions with up 56 Kbit/s.
Since the power output of modems is restricted due to the
regulations of some telecommunication providers, the possible
maximum download speed can be restricted. The actual speed
may be dependent on the online conditions and other factors.
Data sent from the user to the server are transmitted with 31.2
Kbit/s. Prerequisite for this high speed reception is an analog
telephone line compatible with the V.90 standard and a corre-
sponding compatible Internet provider or company-owned host
computer.
Contrary to the modem, ISDN data are transmitted digitally.
The modem is fitted with an RJ-11 interface, into which a
standard telephone lead can be plugged. If your modem is a
combo card please make sure that it is used only with the
appropriate port.
WARNING! Use only analog telephone sock-
ets. The modem cannot withstand the voltage
levels of digital telephone systems such PABX
or lines such as ISDN or Broadband services
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