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18 X4 ADSL Modem User’s Manual
ATM
ATM, or Asynchronous Transfer Mode, allows you to change the
way in which your data is sent over the Internet.
ATM Service Category
Default is UBR (Unspecified Bit Rate). CBR
(Constant Bit Rate) is optional. You can only
use CBR if you have arranged to do so with
your provider.
Bandwidth
Default is
0
(which equals UBR). Specifying
bandwidth is only possible with CBR.
Encapsulation
The
Encapsulation
Mode
, like the VPI and VCI numbers, are
specified by your service provider (see
Permanent VC Settings
,
page 17).
Mode
Supplied by your service provider (reference table
appears on page 5).
Bridge
The
Bridge
option is disabled by default. You should enable it
only if your service provider instructs you to.
IGMP (Internet Group Management Protocol)
IGMP is the Internet standard for IP multicasting, or broadcasting
a message to many recipients simultaneously. Your choices are
enabled
or
disabled
; the default is
disabled
.
IMPORTANT:
Before enabling IGMP, navigate to the Advanced Setup
page, click
Misc Configuration
, select
Enabled
in the
IGMP Proxy
dropdown list, and click
Save Changes
and
Write Settings to Flash and Reboot
. If you don’t
perform this step first, enabling IGMP on this page will
not have any effect.
Default Gateway
Normally, you would not enter anything into the
Default Gateway
field. You would do so only if you want to connect your modem to
the Internet via a different Gateway Router, or if your service
provider has instructed you to change it.