iConnectAccess624W
110
Modem Test
The Modem Test menu item allows you to check whether your iConnectAccess624W is
properly connected to the WAN Network. There are four test types, each of which may
take a few seconds to complete.
The OAM loopback cells are used to verify the connection between the
iConnectAccess624W and the ATM network. For the iConnectAccess624W, OAM
loopback provides a valuable tool for diagnosing problems with the DSL line.
Before you attempt any of these modem tests, ensure the following:
Your DSL Provider / ISP supports them;
You have a valid DSL link.
To Perform A Modem Test:
From any screen in the web interface,
step 1
Click the Tools tab, then Modem Test. The following screen appears:
step 3
Select your connection from the list.
step 4
Select the type of test to perform from the Test Type drop-down list, then
click Test.
The following table lists the Modem Test screen Test Type field and its definitions:
Field Options
Description
Test Type
F5 End
Connectivity to the BRAS server can be verified by initiating
a F5 Seg loopback via the DSLAM and to the authentication
server.
F5 Seg
Lost and corrupted ATM cells can be quickly ruled out in the field
by initiating a F5 Seg loopback (also known as ATM ping) to the
DSLAM and have the DSLAM respond by looping back the OAM
cells. By ruling out problems with the ATM Layer, the service
provider can then focus on examining higher layer protocols and
other configurations to isolate the problem.
F4 End and F4 Seg
Tests
You can perform two types of OAM F4 Tests:
Segment—the end of a connection segment
End-to-end—the end of a VC/VP connection where the ATM cells
are terminated
