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74 CHAPTER 7: ADVANCED CONFIGURATION
6 In the Telephone Number 1 field, enter the telephone number you must dial in
order to reach your ISP.
7 (Optional) If your ISP has a second remote access number, enter it in the designated
field, and select Alternate or Multilink from the drop-down list (that is, choose
whether you want to dial this second number as an alternate number when the first is
unavailable, or whether you want to dial this number in addition to the first to create a
high-speed, Multilink (112K) connection).
8 Under Security, enter your ISP User ID and Password (these may be case-sensitive).
9 For Domain Name Service (DNS) IP Address(es), enter the Primary DNS address of
your ISP in the Primary field, if required (that is, your ISP does not automatically
supply these addresses upon establishing a connection). If there is a Secondary
address, enter it in the Secondary field.
10 Under Bandwidth Allocation, choose whether to always use one channel when dialing
out to this private network, add the second channel as needed, or to always use both
channels.
11 Under Callback Parameters, check Enable Callback if you wish to have your private
network’s remote access (receiving) device drop your call and immediately call you
back whenever you connect to the network; otherwise, leave this and the
remaining Callback fields at their defaults.
This function will only work properly if your Service Provider supports Callback
functionality.
If you chose to enable Callback, make the following selections:
■ Callback Delay: Callback Delay is the amount of time the ISP will wait before
calling back this LAN Modem. By default this is set to 5 seconds.
■ Callback Timeout: Callback Timeout is the amount of time that the LAN
Modem will wait (beyond the Callback Delay) for the ISP to call back. By
default this is 90 seconds.
■ Callback Number: Enter your first analog telephone number (this is the
number to which the ISP will place the Callback call). Note that if a different
Callback number has been specified on the server end, the server callback
number takes precedence.
■ Callback Username and Password: Enter the username and password of the
callback user. These values are used to verify the server’s authenticity to the
client. Note that callback authentication is optional.
Under Miscellaneous, make the following selections.
12 Choose whether or not you would like to use PPP Data Compression when
transferring data.
13 For Network Address Translation (NAT), your choice depends upon the IP
addressing scheme (dynamic or static) used by the ISP that you will be accessing.
Follow this rule of thumb:
■ If you performed the IP Address check in Chapter 3 and optimized your
computer for use with dynamic IP addressing or found that it was already
optimized, choose Yes to leave NAT enabled
■ If you performed the IP Address check and Set up your computer for static IP
addressing, according to the instructions in “Setting Up Your Computer If You
Have a Static IP Address,” then choose No to disable NAT.