Why Isdn; Why High Speed Analog Modems Can Not Compete With Isdn Digital Connections - Planet UI-1280ST User Manual

Isdn t/a 128 passive isdn adapter isa / pci / usb
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Supporting multi-language of MS Windows drivers and quick installation guide.
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Supporting the multi-processors of Windows NT platform.
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All of the ISDN T/A 128 passive cards with the same driver, no matter ISA or
PCI bus, or current version or new version. The latest ISDN T/A 128 drivers
from web-site download can backward compatible with ISDN T/A 128 passive
cards.

Why ISDN?

The ISDN (Integrated Services Digital Network) is the standard for carrying both data
and voice simultaneously. ISDN BRI (Basic Rate Interface) line provides two B-
Channels for voice or data transmission, and each B-Channel can provide data
transmission of up to 64 Kbps. The ISDN network uses the same transmission lines as
the existing analog telephone network, but using a digital signal and higher bandwidth
between the central office (phone company) and the customer. Aside from four times
faster than a standard 28.8 Kbps modem, ISDN also provides an extremely reliable and
stable digital connection.
The ISDN network can set up a connection in about 3 seconds. This is much quicker
than the PSTN network. This feature alone can result in great time savings in the longer
term.
Why High Speed Analog Modems Can Not Compete With ISDN Digital
Connections?
" The high speed modem can run at 28.8 Kbps and will move data at ISDN-type speeds
when you consider data compression" . This assumes a noise-free telephone line and
that the data is easily compressed.
compressed easily, and many telephone lines are far from ideal. ISDN always operates
at its rated speed. Of course, ISDN cards can also use data compression technology to
multiply its raw data transmission speed.
Telephone monopolies allowing, ISDN will inevitably replace the existing analog
telephone network. The conversion is being driven by applications such as
telecommuting, home-working, remote LAN access, video conferencing and access to
the Internet. Today, ISDN is available almost everywhere so all users can should be
able to get the benefits from ISDN now.
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