Allnet ALL126AS3, Руководство пользователя

Страница: 216 / 262

ALL126AS3
USER’S MANUAL
215
2.7 Replace the defective router or cable if necessary.
3. Symptom: VDSL Link cannot be established.
Cause: VDSL setting failure or phone cable length is over the specification limit.
Solution:
3.1 Please make sure that the phone wire must be connected between NV-600L(CO) and
ALL126AS3 (CPE) when both are power on. NV-600L (CO) will do link speed function
depending on phone wire length, therefore if NV-600L (CO) can
’t detect ALL126AS3 (CPE) over
phone wire while both power on, this will cause the link to fail.
3.2 Please check phone wire, we recommend use 24-26 gauge with twisted pair and without rust.
3.3 Please reinsert power when change cable length or link time over 3 minutes.
Note:
Phone wire must meet CAT 3 standard or above and without clustering , otherwise will cause more
cross talk issue to reduce DSL power driver.
4. Question: What is VDSL2? (Only reference)
Answer:
Very-high-speed digital subscriber line 2 (VDSL2) is an access technology that exploits the existing
infrastructure of copper wires that were originally deployed for traditional telephone service. It can
be deployed from central offices, from fiber-optic connected cabinets located near the customer
premises, or within buildings. It was defined in standard ITU-T G.993.2 finalized in 2005.
VDSL2 was the newest and most advanced standard of digital subscriber line (DSL) broadband
wireline communications. Designed to support the wide deployment of triple play services such as
voice, video, data, high definition television (HDTV) and interactive gaming, VDSL2 was intended to
enable operators and carriers to gradually, flexibly, and cost-efficiently upgrade existing xDSL