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As I explained in my previous post, the problem is not with the 3CX system or SPA3102 and here is the reason. When I plug in the line which is working ok with incoming PSTN caller ID to the first SPA3102 unit which does not show the caller on the second SPA3102, it works fine and the same when I plug in the line which is not working on the SPA3102 which does not show the caller id on the SPA unit which shows the caller id, it is the same and no caller id is showing. That means it is an issue with the PSTN line signaling/caller ID method which are from two different providers and it may be the caller ID method or other settings causing a problem with the caller ID. I am sure I know what the problem is but I don't know how to configure the SPA3102 to deal with it.
The problem is the line which is not showing PSTN caller ID according to the syslog sends the caller ID DTMF before the first ring, but the SPA3102 start detecting the caller ID FXO: Start CNDD after the first ring. I tried PSTN answer delay with different values it did not help.
Alan
The problem is the line which is not showing PSTN caller ID according to the syslog sends the caller ID DTMF before the first ring, but the SPA3102 start detecting the caller ID FXO: Start CNDD after the first ring. I tried PSTN answer delay with different values it did not help.
Alan