|
 |
 |
 |
 |
|
Connecting to the Network |
Connecting to WANs |
|
Here
are just some of the current methods
used for ClipExpress/ClipMail network
connections to WANs. (This is not
a complete or exhaustive list since
these technologies are changing daily. |
|
Frame
Relay over T1/E1 lines
Most Local Access Network carriers
(RBOC or equivalent) offering broadband
service have frame relay capability.
T1/E1-style connections are simply
a set of wires—data framing is
provided by your Local Access Connection
frame relay data transport system.
You can often specify how much of
the T1 line you need for your link
(full T1-1.54Mbps, 3/4-1.15Mbps, half-.77
Mbps, or 1/4-.385 Mbps). Some ISPs
offer a straight T1 point-to-point
connection to their POP (Point of
Presence). A straight T1 offers maximum
IP throughput, as it does not have
to support the additional overhead
of Frame Relay. |
|
ISDN
ISDN uses direct-dialed switched circuits.
It allows you to connect at 56Kbps
or 64Kbps (international), and in
some cases even higher. If the ISDN
line offers two B-channels, you can
get connect speeds up to 128K. |
|
DSL
DSL is a generic abbreviation for
Digital Subscriber Line technology.
DSL generally provides increased bandwidth
over already installed POTS (Plain
old Telephone) copper cabling. Data
rates vary depending on the xDSL device
(modem or router). Here are some typical
values:
ADSL - 1.5 -9Mbps downstream, 16-640Kbps
upstream
HDSL - 1.544 Mbps downstream 2.048
Mbps upstream
SDSL - 1.544 Mbps downstream 2.048
Mbps upstream
VDSL - 13-52 Mbps downstream 1.5-2.3Mbps
upstream |
|
| For
further information on ethernet networks
and networking, please refer to the
Telestream paper “Network Connections
and ClipMail™ Pro-An Overview.”
Or, read any of the numerous books
on modern computer networking; look
especially for topics on ethernet,
local area networks (LANs), and wide
area networks (WANs). |
|
|
|
|
|
|
|
|
|
