ZyXEL Communications P-791R V2 - FAQ; Product FAQ

P-791R v2 Support Notes
FAQ .................................................................................................................5
ZyNOS FAQ.................................................................................................5
1. What is ZyNOS? ..........................................................................5
2. How do I access the P-791R v2 SMT menu?.............................5
3. How do I upload the ZyNOS firmware code via console? .......5
4. How do I upgrade/backup the ZyNOS firmware by using TFTP
client program via LAN?............................................................5
5. How do I upload ROMFILE via console port?...........................6
6. How do I restore P-791R v2 configurations by using TFTP
client program via LAN?............................................................6
7. What should I do if I forget the system password? .................6
8. How to use the Reset button?....................................................6
9. What is SUA? When should I use SUA? ...................................7
10. What is the difference between SUA and Full Feature NAT?..7
11. Is it possible to access a server running behind SUA from the
outside Internet? If possible, how? ..........................................8
12. When do I need to select Full Feature NAT? ............................8
13. What IP/Port mapping does Multi-NAT support? .....................9
14. How many network users can the SUA/NAT support? ..........10
15. What are Device filters and Protocol filters?..........................10
16. How can I protect against IP spoofing attacks?.....................10
Product FAQ .............................................................................................12
1. What is SHDSL, SHDSL.bis?....................................................12
2. How can I manage P-791R v2?.................................................12
3. What is the default password for Web Configurator? ...........12
4. What’s the difference between ‘Common User Account’ and
‘Administrator Account’? ........................................................12
5. How do I know the P-791R v2's WAN IP address assigned by
the ISP?.....................................................................................13
6. What do I need before using the SHDSL?...............................13
7. What should I do when the power LED is off? .......................13
8. How to debug while DSL LED is off? ......................................14
9. How do I verify my PC's IP address assigned by the P-791R
v2？ ......................................................................................14
10. What is Traffic Shaping?..........................................................14
11. What do the parameters (PCR, SCR, MBS) mean? ................14
12. What do ATM QoS Types (CBR, UBR, VBR-nRT, VBR-RT)
mean? ........................................................................................15
13. Why do we perform traffic shaping in the P-791R v2? ..........15
14. The P-791R v2 supports Bridge and Router mode, what's the
difference between them?.......................................................15
15.
How do I know I am using PPPoE? .........................................16
16. Why does my provider use PPPoE?........................................16
17. What is DDNS?..........................................................................16
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