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FIBOCOM L860 AT Commands User Manual
Page 187 of 254
Command
Description
AT+CLK26M=?
[Response/Action]
+CLK26M: (list of supported <n>s)
OK
Parameters
<n>
0: switch off the clock, default value.
1: switch on the clock
Example
11 GPRS
11.1 GPRS Functionality
GSM 07.07 defines commands that a TE may use to control a GPRS ME via a non-multiplexed
character-stream interface. This places certain limitations on the functionality of the interface. For
example, it is not possible for the ME to send control information to the TE or for the TE to send
commands to the ME whilst the interface is in the online data state, unless the layer 2 protocol itself
supports this feature (GSM 07.60-12). However, Modem-specific escape mechanism (DTR) is provided to
enable the TE to switch the Modem into limited online command state.
The use of a multiplexed interface, (GSM 07.10), is not considered here (See “Multiplexer Feature”). The
Modem-specific escape mechanism use DTR as an escape signal (following &D parameters) and
designed for limited non network related commands. This specific mechanism purpose is to give the user
a way to retrieve the signal strength. The time limit of consecutive DTR toggles is a minimum of 90
seconds. The Modem-specific is not designed to support online command and data states both at the
same time, therefore any wrong or extreme usage can cause unexpected behaviors. The basic GPRS
concept is be “always connected” and there is no charge for being connected (only per real data
transferred).
11.2 GPRS Commands
This section defines commands that a terminal may use to control a GPRS ME. GPRS MTs vary widely in
functionality. A class A ME might support multiple PDP-types as well as circuit-switched data, and use