Network Address Translation Mode; Front Panel; Lan Indicators; Wan Indicators - ADTRAN Express 4100 User Manual

Chapter 1. Understanding ISDN and the Express 4100/4110

Network Address Translation Mode

Front Panel

LAN Indicators

TX/RX
LI

WAN Indicators

PWR
1
2

Test Indicators

1/2
1-10
NAT is a special mode of operation in which the Express 4100/4110
obtains a dynamically assigned IP address from the peer router (typically
an Internet Service Provider). This allows a network of computers to ben-
efit from Ethernet to ISDN speeds while still appearing to the Internet Ser-
vice Provider (or central site router) as a single IP address, which is
typical of PC based serial dial-up solutions.
A call is initiated to the ISP using the Dial menu or demand for a Connec-
tion List profile that has the IP parameter NAT set to Yes. The network
computer's IP stack may use DHCP to request an IP address, default gate-
way address, and domain name server addresses from the Express 4100/
4110.
"Express 4100/4110 LEDs" on page 1-11 shows the front panel of the
Express 4100/4110. The indicators are divided into LAN functions, WAN
functions, and Test functions.
Flashes green when transmitting data onto the 10BaseT
connector.
Flashes yellow when receiving data from the 10BaseT
connector.
Link integrity. Illuminates when there is a good connection between
the Express 4100/4110 and the Hub/NIC card.
Flashes when the link is inactive; solid when the link is active.
Flashes green when the link is being negotiated; off when the link is
active. After the link is active, 1 flashes green when a call on POTS line
1 is in progress; solid green when a call is connected.
Flashes green when the link is being negotiated; off when the link is
active. After the link is active, 2 flashes green when a call on POTS line
2 is in progress; solid green when a call is connected.
A slow amber flash indicates test in progress; a fast amber flash indi-
cates test has failed.
Express 4100/4110 User Manual 61200176L2-1