Paradyne 8310 MVLt - Manual (Page 89)

Diagnostics and Troubleshooting
6-11 8000-A2-GB26-10 January 1999
Table 6-5. Service Node-to-DSLAM Segment (2 of 2)
Layer Solution
Layer 1 –
Physical
(continued) 5. Make sure the LINE LED on the Service Node is lit. This verifies a
DSL connection to the DSLAM.
6. On the Access Node, make sure the LINE STATUS is up.
7. Make sure the CO splitter is connected correctly. The DSL line goes
to the 50-pin amphenol jack on the DSLAM and the other line goes to
the PSTN switch in the central office.
8. Make sure the 50-pin amphenol jack is firmly attached to the correct
interface on the DSLAM. For the 20-slot chassis, the ports are labeled
1–6, 7–12, and 13–18.
9. Make sure the loop characteristics are within MVL/RADSL
specifications.
Layer 2 –
Network 1. On the DSLAM, if using static IP addressing, make sure the address
is correctly configured (screen A-E-D).
2. On the DSLAM, make sure all configured ports are in use (screen
B-B-A). If ports are not in use, properly configure them.
3. On the DSLAM, check the status of the port (screen A-C-B). If the
status is not active, restart the port.
4. If dynamic addressing is being used and the clients cannot get an
IP address from the DHCP server, statically configure an IP address
and then verify that the client can Ping the DHCP server. After the
client reaches the server, remove the IP address and return the
system to dynamic (DHCP) addressing.
5. An ARP table may have invalid entries if a recent configuration
change took place anywhere on the network and enough time has not
passed for the entry to expire. Check the ARP tables on the client,
DSLAM, and router.
6. To ensure connection between the DSLAM and the Service Node,
perform a packet echo test (screen D-C). Make sure the number of
packets sent is the same as the number of packets received. If fewer
packets are being received than sent, the Service Node may not be
functioning correctly.
7. If the DSLAM fails to connect to the Service Node, attempt to connect
upstream and downstream at lower speeds or configure the card to
rate adaptive mode (screen A-B-B). When a speed is changed, the
port must be restarted (screen A-C-B) for the change to take effect.
If the problem persists after the above items are checked, the client-to-DSLAM
segment of the network is functional.