Eicon Networks DIVA LAN ISDN - Manual (Page 121)

Chapter Nine: Advanced Installations IP routes 121
The following diagram shows four computers with addresses assigned by the DIVA LAN ISDN Modem.
By default, the DIVA LAN ISDN Modem uses the mask 255.255.255.0 when assigning addresses. This means
that the network portion of the address is: 192.168.1.0
Note that the DIVA LAN ISDN Modem has its own address on the LAN: 192.168.1.1
External addresses
When the DIVA LAN ISDN Modem establishes a connection to a remote site, it needs to be identified with an
IP address. This address is associated with the profile making the connection. Since, two profiles are supported,
two IP addresses are required.
Generally, these external addresses are dynamic, and are automatically negotiated when the DIVA LAN ISDN
Modem connects with the remote site. For example, when establishing a link with an ISP, the ISP will
generally assigns an IP address to the DIVA LAN ISDN Modem. This address will change each time the DIVA
LAN ISDN Modem reconnects.
In this example, the address 222.182.22.39 is assigned to the DIVA LAN ISDN Modem. The address is
associated with the ISP profile, since this is the profile that was used to establish the connection.
DIVA LAN ISDN Modem
FAULT POWER
DIVA LAN ISDN Modem
ISDN E4/C E1 E2 E3 LINK Ethernet B1 B2 D
192.168.1.1
192.168.1.5 192.168.1.4
LAN interface
192.168.1.3 192.168.1.2
LAN interface ISP profile
B-channel
DIVA LAN ISDN Modem
Internet
ISP
FAULT POWER
DIVA LAN ISDN Modem
ISDN E4/C E1 E2 E3 LINK Ethernet B1 B2 D
192.168.1.1
192.168.1.5 192.168.1.4 192.168.1.3 192.168.1.2
222.182.22.39
Address dynamically assigned by ISP
Network
ISDN