Branch Link - Aastra OpenCom 100 Mounting And Commissioning User Manual

Configuration Examples

Branch Link

8.5 Branch Link
You can use the OpenCom 100 to interlink two LANs via ISDN.
To do this, you configure two OpenCom 100 systems so that they can dial in to
each other.
In order for this to work, the two LANs must be configured for different IP address
ranges (subnetworks). For at least one of the OpenCom 100 systems, change the
prescribed address range for the LAN.
In the Configurator, Network: Branch menu you can configure the dial-in set-
tings. The OpenCom 100 will set up a connection whenever a IP data transfer to
the other LAN is requested.
Note that such a connection is only set up when specific requests are made. These
can be for FTP file transfers, e-mails or downloading Web pages. Name resolution
via broadcasts is not possible. If you wish to use the LAN-to-LAN link to access files
and printers in the Windows network, you need an IP-enabled server that admin-
isters the name resolution for the Windows network.
As the IP address range, you can select one of the 256 class C subnetworks
designed for local LANs. Select a class C sub-network in the range from 192.168.0.0
to 192.168.255.0.
OpenCom OpenCom
(IP=192.168.99.254, (IP=192.168.11.254,
Net=192.168.99.0) Net=192.168.11.0)
Net S S Net
0 0
PC 1 PC 2 PC 1 PC 2
Net Hub Net Net Hub Net
The OpenCom 100 in a LAN-to-LAN link
98