Telit Wireless Solutions GE863 - Manual (Page 18)

GE863-GPS Software User Guide
1vv0300724 Rev. 2 - 24/01/07
29 -55 dBm MMI may indicate 4 antenna bars
30 -53 dBm MMI may indicate 4 antenna bars
31 -51 dBm or more MMI may indicate 4 antenna bars
99 not detected MMI may indicate flashing antenna bars
NOTE: when is less than 6, only 1 MMI antenna bar, the quality of a call will be poor and
the call may even drop.
is an integer from 0 to 7 and 99 that reports the received signal quality measured on the radio
traffic channel.
NOTE: The quality is measured on the traffic channel, hence it is available only during a
conversation, in Idle the reported value must not be considered.
In conversation the quality decreases with the increase of the number.
NOTE: The value refers strictly to the GSM radio channel and is a very technical
parameter, it can be used to monitor the voice call quality since the voice quality is inversely
proportional to the number.
NOTE: For Data calls the signal quality reported is not directly connected to the connection
quality. The reported signal quality refers only to the GSM radio channel link and not to the
whole path from the caller to the receiver, so it may happen that the quality on the GSM radio
link is very good and hence the reported is 0 (good quality) but the quality of the
remaining path to the other party is very bad and hence the final data connection quality is
very poor.
For this reason the signal quality indicator should not be taken into account to monitor
data calls quality.
2.5.3.4 Quick Network Status Checking
Once the mobile has registered on one network, it may be useful to know the received signal strength
and the network on which the mobile is registered. These information can be gathered with the
commands +CREG, +COPS and +CSQ, which are part of the standard ETSI GSM 07.07 commands
as seen before, unfortunately these commands are not so fast in the response due to network
response time, especially the +COPS command. If You want to keep your software as general as
possible you can follow the indications given before and forget this part; instead if you need or want a
faster way to check at the mobile network information, the GE863-GPS provides a special command
#MONI which can be used to gather all the information needed in a faster and simpler way:
send command AT#MONI=0
•
•
wait for
OK
response
•
send command AT#MONI?
•
wait for response in the format:
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