Motorola V60 Series Manual page 63

o Cross talk: The cellular telephone has captured a "voice channel" from another base site
due to weak coverage or multi-path condition. This is a landline or system coverage
problem.
o Dropped calls: Weak coverage area, multi-path condition, or "system" drop.
o Clicks/occasional chopped word: System handoff to another base site.
o Increased/decreased volume at either landline or vehicle.
o Echo or feedback: The current "voice channel" that the system has assigned to the
cellular telephone has a higher or lower gain, or more or less "side tone," compared to a
previous channel.
It is extremely important to confirm that there is in fact good coverage in the area where
difficulties are encountered. "Dead" or "Black" zones are very prevalent in. all areas.
1. In which mode below are static or dropped
calls experienced?
A. Portable Mode only (coil cord unplugged).
Go to STEP 2.
B. Mobile Mode only (coil cord plugged in).
Go to STEP 4.
If the problem exists in both the Mobile and Portable Modes-most likely this is a cellular system
problem and not the phone in the vehicle. If available, compare to another phone on the same
cellular provider. If this is not possible, use the Portable Mode (A) test first and then proceed
with the Mobile Mode (B) test.
In the Portable Mode (coil cord unplugged), is the static/dropped call condition Not
2.
Evident Now (Intermittent) or Evident Now (Continuous)?
Not Evident Now (Intermittent) -Question the customer to determine if he/she has noted a pattern
such as the same location, time of day, or type of geography (hills, valleys, tunnels, etc.) during
which the static/dropped call problem occurs and what is the SSM (Signal Strength Meter) at the
time of the occurrence. (As with any intermittent complaint, do not replace parts without
confirming the condition.) Record all information on the "Troubleshooting Questionnaire."
Is Signal Strength Meter High or Low (Portable Mode)?
High - 3 bars or more. Go to STEP 3.
Low - 2 bars or less. Most probable no malfunction exists. Some static is normal in this range and
it is likely that calls could be dropped if conditions change, but reconfirm that antenna is in good
condition and properly installed. Ask customer to gather more data if condition persists, paying
particular attention to the SSM. END
Evident Now (Continuous -meaning it is present now!) - Place a call to reconfirm the noise.
Make sure signal strength is 3 bars or more! Obtain another Portable Plus phone. Place a call
from each unit in the same area in Portable Mode.
Mercedes Benz Telephone Manual v4.6
4.0 Troubleshooting Section
Date: 09/01/2004