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Chapter Nine: Advanced Installations Connecting more than four computers
107
If your LAN has a router
If you have a router on your LAN, it is likely configured as the default gateway for your computers. In this
case, you will need to configure the routing table on your router to re-direct the appropriate traffic to the DIVA
LAN ISDN Modem. And add a route on the DIVA LAN ISDN Modem to direct appropriate traffic to the
router.
Consider the following example:
• Traffic from LAN A addressed to LAN B is forwarded by the router to LAN B.
• Traffic from LAN A addressed to the Internet needs to be forwarded by the router to the DIVA LAN ISDN
Modem. This requires you to configure a route on the router.
• Traffic from the Internet to LAN B needs to be forwarded to the router. This requires you to configure a
route on the DIVA LAN ISDN Modem. No route is needed for traffic to LAN A.
Connecting more than four computers
In certain cases, you may want to share the DIVA LAN ISDN Modem with more than four computers. To do
this, you can connect the DIVA LAN ISDN Modem to an Ethernet hub. This connection requires either a
special Ethernet cable, called a cross-over, or you can use the supplied blue cable if the hub has a cross-over
switch. Try connecting the supplied blue cable to the hub, if the green Ethernet light on the DIVA LAN ISDN
Modem does not light up, you need a special cross-over cable.
Note
If the hub is part of a local area network, you will need to adjust configuration settings on the DIVA LAN
ISDN Modem. See “Installing on an existing LAN” on page 104 for details.
Router
LAN A LAN B
Internet
FAULT PO WE R
DIVA LAN ISDN Modem
ISDN
E4/CE1 E2 E3
LINK
Ethernet
B1 B2 D
DIVA LAN ISDN Modem
Computer
Computer Computer
Computer
Computer Computer
Computer
Computer Computer
Fax
Phone
ISDN
PHONE ETHERNET
1 2 E4 E3 E2 E1 CONSOLE
POWER
12VDC
Reset
Cross-over
cable
Third-party Ethernet Hub
ISDN Wall Outlet
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
6
1
2
3
6
1
2
3
6
1
2
3
6
End
End
Normal Cable
Cross-over Cable
End
End