Howto:Fault tolerance setup with three ISDN BRI lines: Difference between revisions
(New page: As know using IP800 ISDN fault tolerance scenario can be realized. This is possible because an IP800 has the possibility to switch two ISDN BRI liens to a standby PBX (Gateway) in case of ...) |
mNo edit summary |
||
Line 62: | Line 62: | ||
<!-- == Related Articles == --> | <!-- == Related Articles == --> | ||
[[Reference:Configuration/BRI/Physical|Pinout of the BRI connector]] | [[Reference:Configuration/BRI/Physical|Pinout of the BRI connector]] | ||
[[Howto:How_ISDN_wiring_works | |||
[[Howto:How_ISDN_wiring_works]] | |||
[[Category:Howto|{{PAGENAME}}]] | [[Category:Howto|{{PAGENAME}}]] |
Revision as of 14:00, 24 October 2011
As know using IP800 ISDN fault tolerance scenario can be realized. This is possible because an IP800 has the possibility to switch two ISDN BRI liens to a standby PBX (Gateway) in case of fault. But what if a customer has three BRI lines? No problem, here is how to deal this using still using just two IP800.
Applies To
This information applies to
IP800
Problem Details
IP800 has just two relay and therefore just two BRI can be switched, but you can use the second unit even in normal operation.
Just add some simple routings and wire the setup as show in the following picture:
The blue lines represent the active ISDN lines, the red ones cabling waiting for action.
In normal operation the GW1 (the active PBX) will handle line 1 and 2 while the standby GW work with line 3 and via the network communicate with the GW1 (and active PBX). The following ISDN lines will terminate on the Gateway/Port:
Line 1: GW1 – Tel1 Line 2: GW1 – Tel3 Line 3: GW2 – Tel3
In case of failure of the GW1 the following setup is given:
The following ISDN lines will terminate on the Gateway/Port:
Line 1: GW2 – Tel1 Line 2: GW2 – PPP Line 3: GW2 – Tel3
If instead standby GW fails, the following setup is automatically given:
The following ISDN lines will terminate on the Gateway/Port:
Line 1: GW1 – Tel1 Line 2: GW1 – Tel3 Line 3: GW1 – PPP
Even if both gateways fail there is no shortcut, because the electrical situation will be the following:
The lines will end to the following (not working) port.
Line 1: GW2 – Tel1 Line 2: GW2 – PPP Line 3: GW1 – PPP
Note: The article describes the hardware wiring, the logical setup in the routing table is not part of this description, but follows the hardware design and is simple.