i have a spa9000 and the gateway spa400, telephone provider is cable germany (Kabel Deutschland).
Nearly every second or third phone call ends after 5 minutes. One telefon shows the ip code 701, which means that the the person which i have call has ended the call. But the don't have hang up.
I tried several parameters, connect every phone with his own cable direct to one switch which is only used by the telephones and putted the telephone network into a vlan (WRV200 Router) so that nothing from the other network could influence the telephoning system.
I have analysed that the drops are mostly at phonecalls where the called person has an analoge telephone connection.
I made several phone calls to my cellphone with 1hour length and it had not dropped.
Could you please help me!