D820R ADSL2+ Router User Guide
Appendix 2: FAQ
1. Q: What are VPI, VCI?
A
：
VPI (Virtual Path Identifier) and VCI (Virtual
Channel Identifier) are to identify ATM terminal
(ADSL) for DSLAM, usually provided the local
ISP.
2. Q: What related parameters are required from your
ISP?
A: For dial user, Connection protocol, User name,
Password, Value of VPI/VCI, Encapsulation mode
and so on.
3. Q: The firmware upgrade fails and I can’t enter the
Web-based management interface?
A: Contact the technical engineer for support or
after-sales service engineer.
Note: please download the upgrade packets from the
Tenda website.
4. Q: Have completed all configurations, but can’t dial
through computer?
A: 1) Check the indicator of ADSL, it should be
working in normally.
2) Check the accuracy of parameter of value of
VPI/VCI, Encapsulation mode and so on.
36
