Bug #1816
Updated by neels about 7 years ago
Using the ip.access nano3g, I observe some unreliability when issuing USSD requests from the UE towards the CN: requests: * When a registered UE's IuCS is in release, a USSD request succeeds very quickly: an InitialUE message with a CM Service Request "wakes up" IuCS, authentication and ciphering is established, then the USSD goes through. * When the IuCS is *not* released yet but still open, e.g. a USSD is issued right after a call or another USSD request, no message at all is received from the nano3G. The phone shows a USSD processing dialog that "hangs". I expect a Supplementary Services message to show on the Iuh to be forwarded to IuCS, but the nano3G stays quiet. The USSD times out. Waiting for another IuCS release and sending the same USSD again is then successful again. I assume this is a problem with the nano3G specifically. Check how the SysmoCell behaves in this scenario.
