CID Issues with some Siemens DECT phones in France

SOLUTION: add correct cadence

In France, the CID is different than other country.
Then standard ring cadence is: 1500 3000 1500 30000 and so…

The etsi standard (used in France) say:

The short ring is called Ring Pulse Alert Signal (RP-AS) .
From ETSI EN 300 659-1 V1.3.1 (2001) :

• 200ms < RP-AS duration < 300ms
• 500ms < RP-AS to FSK < 800ms
• 200ms < FSK to FSK < 500ms

Try adding
cadence=250,1500,1500,3000,1500,3000
In zapata.conf

And use in extension.conf

exten => 200,1,Dial(Zap/1r1,20,tr)

This solution worked for me!