MC55 AT Command Set
8.6 AT^MONI s
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MC55_ATC_V01.05 Page 199 of 469 2/10/04
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Columns for Dedicated channel:
8.6.2 Service states
Depending on the service state, an additional textual output is generated (refer also to the response examples):
• 'Searching' - The MS is searching, but could not (yet) find a suitable cell. This output appears after restart of
the MS or after loss of coverage.
• 'No connection' - The MS is camping on a cell and registered to the network. The service state is 'idle', i.e.
there is no connection established or a dedicated channel in use.
• 'Cell Reselection' - The MS has not yet lost coverage but is searching for a better cell, since the cell reselec-
tion criterion is fulfilled.
• 'Limited Service' - The MS is camping on a cell but not registered to the network . Only emergency calls are
allowed. The MS enters this state, for example, when
- no SIM card is inserted, or PIN has not been given,
- neither Home PLMN nor any other allowed PLMN are found,
- registration request was not answered or denied by the network (use comman d AT+CREG to query the
registration status),
- authentication failed.
8.6.3 Notes
• The parameters LAC and cell are presented as hexadecimal digits, t he remaining parameters are composed
of decimal digits.
• If the radio cell changes during a connection, the parameters PWR, RXLev and C1 of the 'Serv ing Cell' part
cannot be updated under certain conditions and therefore, ar e displayed as "-" (for conditions see also
AT+CREG). This is because the MS does not update the cell selection and re selection parameters since, in
this mode, they are not relevant for operation. When the connection end s, and the mobile is back to IDLE
mode, correct values will be given.
If the radio cell changes during a connection, it normally takes 1 or 2 seconds to update the parameters cell,
PWR maximal power level used on RACH channel in dBm
RXLev minimal receiving level (in dBm) to allow registration
C1 coefficient for base station selection
Column Description
chann ARFCN (Absolute Frequency Channel Number) of the TCH carrier
Note: <chann> = h indicates frequency hopping.
TS timeslot number
timAdv timing advance in bits
PWR current power level
dBm receiving level of the traffic channel carrier in dBm
Qreceiving quality (0-7)
ChMod channel mode (S_HR: Half rate, S_FR: Full rate, S_EFR: Enhanced Full Rate)
Column Description