4-Band VDSL CO/CPE MODEM USER’S MANUAL Ver. A.2
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when both are power on. 4-BAND VDSL CO Modem will do auto speed function depending on phone wire length, therefore if
4-BAND VDSL CO Modem can’t detect 4-BAND VDSL CPE Modem 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 twist pair and without rust, and the length is not over 1.9km.
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.
4.
Symptom:
VDSL speed mode LED is always flashing.
Cause:
VDSL speed mode link is at the limit of phone cable length.
Solution:
Please change speed mode through Dip switch.
5.
Symptom:
We tested with a regular S0 bus from an NTBA - data works, but ISDN telephone does not.
Solution:
You must connect according to the following chart if you want to connect CO and CPE with NTBA.
