Billion BiPAC 7402(G)X(L) Series User Manual page 83

(when acting as a server). When using PAP, the password is sent unencrypted, while CHAP encrypts the
password before sending, and also allows for challenges at different periods to ensure that an intruder
has not replaced the client.
MTU: Maximum Transmission Unit. The size of the largest datagram (excluding media-specific headers)
that IP will attempt to send through the interface.
PIN: PIN stands for Personal Identification Number. A PIN code is a numeric value used in certain
systems as a password to gain access, and authentication. In mobile phones a PIN code locks the SIM
card until you enter the correct code. If you enter the PIN code incorrectly into the phone 3 times in a row,
then the SIM card will be blocked and a PUK code will be required from your network / service provider to
unlock it.
Connection:
Always On: The router will make UMTS/GPRS call when starting up. Enabling Always On, will give
you an option of Keep Alive.
Keep Alive: Set Enable to keep the router on line and prevent to be disconnected by the ISP when
they think there is no activity on the line.
Connect to Demand: If you want to make UMTS/GPRS call only when there is a packet requesting
access to the Internet (i.e. when a program on your computer attempts to access the Internet). In this
mode, you must set Idle Timeout value at same time. Enabling Connect on Demand will give you an
option of Idle Timeout.
Idle Timeout: Auto-disconnect the connection when there is no activity on this call for a
predetermined period of time. The default value is 10 min(s).
NAT: The NAT (Network Address Translation) feature allows multiple users to access the Internet
through a single IP account, sharing the single IP address. If users on your LAN have public IP addresses
and can access the Internet directly, the NAT function can be disabled.
Obtain DNS Automatically: Select this checkbox to use DNS.
Primary DNS/ Secondary DNS: Enter the IP addresses of the DNS servers. The DNS servers are
passed to the DHCP clients along with the IP address and the subnet mask.
Note: If you don't know how to set these values and please keep them untouched.
Chapter 4: Configuration
(802.11g) ADSL2+ (VPN) Firewall Router
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