02-16-2019 02:56 AM - edited 03-17-2019 02:07 PM
Dear,
02-16-2019 10:27 PM
02-17-2019 04:41 AM
Dear Friend,
Even using the 9-4-1SR3 firmware in cp 3905 the problem still exists. We used in my company also the phones model 8845 and 8865 and in these it was enough to carry out the firmware update so that the problem was solved (CSCvn57643)
This is causing great complaints from users.
The phone is running out of ringback tone when 183 Session Progress (with SDP) is followed by 180 Ringing (The calls are routed to PSTN after initial announcement)
Best Regards
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