See https://bazaar.launchpad.net/~ubuntu-branches/ubuntu/wily/bluez/wily/view/head:/audio/telephony-ofono.c#L1346 for details.
See https:/ /bazaar. launchpad. net/~ubuntu- branches/ ubuntu/ wily/bluez/ wily/view/ head:/audio/ telephony- ofono.c# L1346 for details.