Lancom Systems Modem Adapter Kit interface cards/adapter purchased inexpensively from Mercateo

Internet access via modem with all of the router functions such as firewall, automatic connection establishment and termination, etc.
- Remote maintenance (e.g. dial-in to international sites)
- Backup connection (e.g. high-availability through GSM/GPRS modem connection)
- Dynamic VPN: IPSec site couplings with dynamic IP addresses

Internationally, analog telephone connections are just as common in the business world as the predominant ISDN connections in Germany. The operation of international networks thus places particular demands on remote maintenance options and for high-availability of the gateways and thus requires different interfaces than the ISDN common in Germany. Apart from conventional analog telephone lines, mobile telephone networks such as GSM or GPRS may, in certain cases, represent the only way of providing remote maintenance without broadband or other cabled access. In response to these requirements, most LANCOM models with a serial interface can be extended with an additional WAN interface with the use of analog modems, GSM or GPRS.

The following are required to set up a backup connection over the serial interface:
- LANCOM with serial configuration interface from the following list:
- LCOS as of version 4.12
- LANconfig as of version 4.12, or alternatively a web browser or Telnet
- Serial configuration cable
- Analog modem, Hayes compatible, with access to a suitable analog telephone connection
- LANCOM modem adapter kit to connect the modem over the serial configuration cable or alternate adapter with suitable contact assignment