C55/C55i AT COMMAND SET Description Preliminary - Falcom

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C55/C55I AT COMMAND SET VERSION 1.00 Columns for Dedicated channel: Column Description chann ARFCN (Absolute Frequency Channel Number) of the TCH carrier Note: = 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 Q receiving quality (0-7) ChMod channel mode (S_HR: Half rate, S_FR: Full rate, S_EFR: Enhanced Full Rate) 7.6.2 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 reselection 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 7.6.3 Notes - 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 command AT+CREG to query the registration status), - authentication failed. • The parameters LAC and cell are presented as hexadecimal digits, the remaining parameters are composed of decimal digits. • If the radio cell changes during a connection, the parameters PWR, RXLev and C1 of the 'Serving Cell' part cannot be updated under certain conditions and therefore, are displayed as "-" (for conditions see also AT+CREG). This is because the MS does not update the cell selection and reselection parameters since, in this mode, they are not relevant for operation. When the connection ends, 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, NCC and BCC. Until the This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 138
C55/C55I AT COMMAND SET VERSION 1.00 information is received from the new base station, the default values will be shown instead: cell="0000", NCC="-", BCC="-". If the BS supports frequency hopping during a connection, the dedicated channel (parameter chann) is not stable. This mode is indicated by chann = 'h'. • To some extent, the cell monitoring command AT^SMONC covers the same parameters. The receiving level, for example, can be queried with both commands. Yet the resulting values may be slightly different, even though obtained over a time period of a few seconds. This is quite normal and nothing to worry about, as the cell information is permanently updated. • For compatibility with earlier products and to support legacy applications, any input character may be used to stop the output in certain cases (depending on the settings of 3.7 and 0.1). ^ 7.7 AT MONP Monitor neighbour cells Syntax Test Command AT^MONP=? Exec Command AT^MONP Write Command AT^MONP= Response(s) ^MONP: (list of supported s) OK Response(s) See: 7.7.1 OK Response(s) See: 7.7.1 OK Reference(s) PIN ASC0 SIEMENS ○ ● Command Description This command can be used to obtain information of up to six neighbour cells on request. This command can be used to retrieve information of up to six neighbour cells automatically every n seconds. To stop the presentation type "at" or "AT". Parameter Description (num) Display period in seconds 1...254 Note • Due to the fact that not all necessary information of the neighbour cells can be decoded during a connection, there are several constraints to be considered: - Only neighbour cells that have already been visible in IDLE mode will be further updated, as long as they are still included in the list. - Though new neighbour cells can be added to the list (e.g. due to handover), their C1 and C2 parameters cannot be displayed until This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 139
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C55/C55i AT COMMAND SET Description Preliminary - Falcom

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