NGM tango Guide Rapide page 38

Then, the phone will call the five SOS numbers, for about 20
seconds each. If there is no answer, there will be a second cycle of
calls. This procedure will be repeated for 5 times. If one of the
called numbers answers, the cycle will be interrupted and the call
will automatically switch to speaker phone (handsfee).
Attention: The SOS calls cycle will be interrupted if the
answering machine of one of the called SOS numbers takes the
call.
38 ENGLISH
SMS
recipients
SOS SOS SOS
numbers