A DSL modem will not train up. It is on a “shared line” (DSL and POTS), and the telephone on the shared line is working normally. Nine of the ten conditions are possible causes of the symptom, and one is not. What is NOT a possible cause of the problem?
A.
A defective DSL line card in the DSLAM
B.
A defective DSL CPE modem
C.
An open (cut or broken) tip or ring lead on the phone line between the customer premises and the telco C.O
D.
The DSL port in the DSLAM is in “shutdown” state
E.
The DSL port in the CPE DSL modem is in “shutdown” state
F.
The DSL operating mode in the DSLAM does not match the operating mode of the CPE DSL modem
G.
A loose cable between the telco POTS splitter and DSLAM
H.
A loose or broken connection between the DSL modem and telephone line
I.
An incorrectly connected POTS splitter between the DSL modem and telephone line
J.
A DSL microfilter was accidentally installed in the DSL line between the DSL modem and DSL line