D-Link Co.,_______________________________________________________________________ FAQ
FAQ: 22
concurrently for the cost of a single user.
NAT is a generic name defined in RFC 1631 "The IP Network Address
Translator (NAT)". SUA (Internet Single User Account) is D-
Link's
implementation and trade name for this functionality.
The primary motivation for RFC 1631 is that there are not enough
IP addresses to go around. In addition, a great many
corporations simply did not bother to obtain legal (globally
unique) IP addresses for their networks and now finding
themselves unable to connect to the Internet.
Basically, NAT is a process of translating one address to
another. An NAT implementation can be as simple as substituting
an IP address with another. This allows a network to rectify the
illegal address problem mentioned above without going through
each and every host.
The design goal of D-Link’s SUA is to minimize the Internet
access cost in a small office environment by using a single IP
address to represent the multiple hosts inside. It does more
than IP address translation, so that multiple hosts on the LAN
can access the Internet at the same time.
The legal gateway IP address can be statically assigned or the
Router can dynamically ask the ISP for it. The number of
simultaneous users is limited by the fixed-size translation
table; a reasonable number being less than 20 users. Beyond
that, the single ISDN pipe would probably become the bottleneck
and any increase in the translation table size will not help.
SUA is an ideal solution for a small office environment with less
than 20 people and one server. For more than 20 people or more
than one server, a Class C address is recommended.
2.
Can I setup two SUA account?
No, SUA account can only be setup in Menu 4, therefore, you
cannot setup two SUA account. If you set 0.0.0.0 or don’t set any
IP address in Menu 11 for the ‘Rem IP Addr’, Router will not
allow you to save it.
3.
Can I use a phone and the Router on the same BRI?
3.a
Analog (POTS) phone
The Router has a built-in standard phone jack (POTS) which means
that you can use any analog device (phone, answering machine, fax
machine, etc.) on the same BRI.
4.
How do I set up the Router to use the POTS port?
Plug your analog device (phone, answering machine, fax maching,
etc.) into the POTS port of your Router. Then make sure in menu
2 that one of the phone numbers ‘Analog Call’ field is set to
‘Voice’. You can then make and receive calls from your device
