2Giga Ethernet Managed 4 Band VDSL IP DSLAM USER’S MANUAL Ver. A.4
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3. Symptom:
VDSL Link cannot be established.
Cause:
VDSL speed mode setting failure or phone cable length is over the specification limit of the speed
mode.
Solution:
3.1 Please make sure that the phone wire must be connected between NVF-200LS and
NVF-200R when both are power on. NVF-200LS will do link speed function depending on
speed mode setting and phone wire length, therefore if NVF-200LS can’t detect NVF-200R
over phone wire while both power on, this will cause the link to fail.
3.2 Please check phone cable must be 24 gauge with twisted pair and without rust, and the length
is not over 1.9km.
3.3 Please check the correct Dip Switch setting.
Note:
Phone cable must meet CAT 3 standard or above and without clustering, otherwise will cause more
cross talk issue to reduce DSL power driver.
