XtendLan VC102SB – User’s Guide
http://www.xtendlan.com
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7 Troubleshooting
Diagnosing the Modem’s Indicators
The Modem can be easily monitored through its comprehensive panel indicators.
These indicators assist the network manager in identifying problems the hub may encounter.
This section describes common problems you may encounter and possible solutions:
Symptom:
Ready indicator does not light up (green) after power on.
Cause:
Defective External power supply
Solution:
Check the power plug by plugging in another that is functioning properly. Check the
power cord with another device. If these measures fail to resolve the problem, have the unit
power supply replaced by a qualified distributor.
Symptom:
Link indicator does not light up (green) after making a connection.
Cause:
Network interface (e.g, a network adapter card on the attached device), network
cable, or switch port is defective.
Solution:
1. Power off and re- power on the VDSL Modem.
2. Verify that the switch and attached device are powered on.
3. Be sure the cable is plugged into both the switch and corresponding device.
4. Verify that the proper cable type is used and its length does not exceed specified
limits.
5. Check the Modem on the attached device and cable connections for possible defects.
6. Replace the defective Modem or cable if necessary
7. Verify the VDSL switch and VDSL Modem during the same speed mode. You can
select VDSL Speed mode by 10 Mbps. Only same speed mode can link and work.
VDSL default transmission mode is 10 Mbps
Symptom
: VDSL Link can not be established.
Cause
: Rusted phone wire, not standard 24 gauge phone wire, not twisted-pair phone wire,
wrong speed mode.
Solution
: Check if speed of CO and CPE is in the same speed mode else please increase
interleaver depth value to 8 or above.
Symptom:
We tested with a regular S0 bus from an NTBA - data works, but ISDN telephone
does not.
Solution:
You have to connect as following chart if you want to connect
VDSL CO
Modem
Smart and VDSL CPE Modem with NTBA.
