thank you Pix
I was thinking about that but I was not sure
An other question:
Perhaps you know what is the etsi document number that talk about that
(info carried by Sacch and Facch, broadly speaking: all logical channels)
And about the management of call waiting, I presume that the conferences Devices manage it in the MSC (in fact it should be something in the MSC, because when we change MSC service AREA without updating because we are on the call, the initial MSC (Anchor) should be able to route the call to the second MSC )
regards