Configuring the LANCOM

The following table provides a summary of the information required for configuration and where it can be entered. Basically, all that is needed is a SIP PBX line for each location that is correspondingly setup at the remote location

  LANCOM Location A SIP terminal equipment location A LANCOM Location B SIP terminal equipment location B
Internal VoIP domain location_A.internal location_A.internal location_B.internal location_B.internal
Internal numbers   10 to 19   20 to 29
External SIP telephone number 4   4  
Access information for SIP account 4   4  
External ISDN telephone numbers (MSNs) 4   4  
Country and local area code 4   4  
SIP PBX line LOCATION_B   LOCATION_A  
SIP PBX domains location_B.internal   location_A.internal  
Call route
  1. Called number '2#'
  2. Destination line 'LOCATION_B'
  3. Destination number ''2#'
 
  1. Called number '1#'
  2. Destination line 'LOCATION_A'
  3. Destination number ''1#'
 
Note: Although SIP PBX lines are the subject of the configuration presented here, you can still use this function even without a PBX.

Detailed instructions on configuring the LANCOM:

  1. Under LANconfig, start the setup wizard for configuring the VoIP Call Manager. Enable the options 'SIP phone system', 'ISDN phone system' and 'ISDN users'.




  1. Configure the device as described in the preceding examples:
    • one line to a SIP provider
    • ISDN line with MSN mapping
    • Area and country code for each location
  2. Enter a unique domain for the local VoIP domain which describes the local VoIP range for the site. Both sites use different VoIP domains, e.g. 'location_A.internal' or 'location_B.internal'.
  3. Configure the line leading to the SIP PBX with the following values:
    • SIP PBX line name: Unique name for the line leading to the remote site.
    • PBX SIP domain/realm: Internal VoIP domain for the remote site.
    • Registrar (FQDN or IP): Address for the LANCOM at the remote site, in the event that the device cannot be identified via DNS resolution of the VoIP domain (PBX SIP domain/realm).
      Note: Use the private IP address that can be reached via VPN for the LANCOM here, not the public IP.
    • Leave the field for the shared password empty when registering to the SIP PBX.
    • Leave the field for the public PBX number empty.
  4. The call routing table suggested by the setup wizard automatically allows international and national long distance calls to be made via remote site's line, local calls are routed via ISDN.
    • In addition, a standard route directs all numbers which cannot be resolved to the remote location's line.




  5. Adapt the suggested call routing table in order to make international and national long distance calls via the SIP provider line with backup over ISDN. When doing so, please observe that the '0' preceding the number must be removed.