Integration Manual

TOBY-L2 and MPCI-L2 series - System Integration Manual
UBX-13004618 - R04 Advance Information System description
Page 48 of 141
1.15 System features
1.15.1 Network indication
Network status indication over GPIO1 is not available on MPCI-L2 series modules which include the
LED_WWAN# active-low open drain output to provide the Wireless Wide Area Network status indication
as specified by the PCI Express Mini Card Electromechanical Specification [14].
General Purpose Input / Output pins are not supported by the TOBY-L2x0-00S product version except for
the Wireless Wide Area Network status indication configured on the GPIO1 pin.
The GPIO1 can be configured by the AT+UGPIOC command to indicate network status as described below:
 No service (no network coverage or not registered)
 Registered 2G / 3G / LTE home network
 Registered 2G / 3G / LTE visitor network (roaming)
 Call enabled (RF data transmission / reception)
For the detailed description of the network status indication configuration, see u-blox AT Commands Manual [3],
GPIO commands.
1.15.2 Antenna supervisor
Antenna supervisor (i.e. antenna detection) is not available on MPCI-L2 series.
Antenna supervisor (i.e. antenna detection) is not supported by the TOBY-L2x0-00S product version.
The antenna detection function provided by the ANT_DET pin is based on an ADC measurement as optional
feature that can be implemented if the application requires it. The antenna supervisor is forced by the +UANTR
AT command (see the u-blox AT Commands Manual [3] for more details).
The requirements to achieve antenna detection functionality are the following:
 an RF antenna assembly with a built-in resistor (diagnostic circuit) must be used
 an antenna detection circuit must be implemented on the application board
See section 1.7.2 for detailed antenna detection interface functional description and see section 2.4.2 for
detection circuit on application board and diagnostic circuit on antenna assembly design-in guidelines.
1.15.3 Jamming detection
Congestion detection (i.e. jamming detection) is not supported by TOBY-L2x0-00S and MPCI-L2x0-00S.
In real network situations modules can experience various kind of out-of-coverage conditions: limited service
conditions when roaming to networks not supporting the specific SIM, limited service in cells which are not
suitable or barred due to operators’ choices, no cell condition when moving to poorly served or highly interfered
areas. In the latter case, interference can be artificially injected in the environment by a noise generator covering
a given spectrum, thus obscuring the operator’s carriers entitled to give access to the LTE/3G/2G service.
The congestion (i.e. jamming) detection feature can be enabled and configured by the +UCD AT command: the
feature consists of detecting an anomalous source of interference and signaling the start and stop of such
conditions to the host application processor with an unsolicited indication, which can react appropriately by e.g.
switching off the radio transceiver of the module (i.e. configuring the module in “airplane mode” by means of
the +CFUN AT command) in order to reduce power consumption and monitoring the environment at constant
periods (for more details see the u-blox AT Commands Manual [3]).