Fault profiles for voice quality / audio output

The last four columns contain the information on which telephone systems each fault profile applies to:

A: telephone systems with cordless handset (e.g. optional extra 638)
B: telephone systems with hard-wired mobile phone (e.g. optional extra 639 E6x before 03/2005 without Bluetooth retrofit, E65 US before 03/2005, optional extra 664 before 03/2005)
C: Telephone systems with mobile phone connected via Bluetooth (e.g. optional extra 633, optional extra 639 E6x with Bluetooth retrofit, optional extra 639 E6x as of 03/2005, E65 US as of 03/2005, optional extra 664 E65 as of 03/2005 (not Korea), optional extra 639 E87 or E90 and their derivatives as of volume production launch)
D: telephone systems with snap-in adapter connected via Bluetooth (e.g. optional extra 664, only Korea)

Voice quality / audio output

1	The telephone call is not output across the loudspeakers in the hands-free mode.	A	B	C
2	Poor voice quality (call via hands-free speaking system)			C
3	Poor voice quality (call via hands-free speaking system)	A	B	C	D
4	The customer hears popping noises from the loudspeakers although no call is active.	A	B	C
5	Sporadic call interruptions	A		C
6	When the vehicle is started during an active call, the call is lost for approx. 20 seconds.			C