Branch Link - Aastra OpenCom 510 User Manual

Configuration Examples

Branch Link

9.5 Branch Link
You can use the OpenCom 510 to interlink two LANs via ISDN.
To do this, you configure two OpenCom 510 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 510 systems, change the
prescribed address range for the LAN.
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 510 in a LAN-to-LAN link
In the Configurator, NET Configuration: Branch menu you can configure the
dial-in settings. The OpenCom 510 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 admi-
nisters 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.
107