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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.
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.
(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.
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,
Mode
Supplied by your service provider (reference table
appears on page 5).
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.
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
Write Settings to Flash and Reboot. If you don’t
perform this step first, enabling IGMP on this page will
not have any effect.
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.
provider has instructed you to change it.