ScoopTeam - User manual - Draft 0002
15
2.3.3. Mobile network access
Units equipped with the “Mobile” option include an integrated module for access to mobile networks,
and a holder for a SIM card.
The accessible networks are 2G (GSM, EDGE), 3G (UMTS), 3G+ (HSDPA, HSUPA, HPA…), and 4G/LTE.
For the operation, at least one multiband antenna (to be selected for compliance with the mobile
network characteristics) must be connected on ScoopTeam. An antenna “diversity” feature gives an
opportunity to improve the stability when the radio reception quality is poor, by connecting a second
antenna.
Mobile voice mode – HD Voice (
NYA
)
The integrated module allows to use the mobile phone service, for communicating with all ISDN or PSTN
telephone terminals or hybrids, or with other mobile terminals. The quality is in such case that of mobile
connections, with a 300-3400 Hz bandwidth and coding such as GSM, EFR, AMR...
Now many mobile networks also propose “HD Voice”, an extension of this mobile telephone service.
With this new capability, compatible terminals implement the AMR-WB coding algorithm (standardised
as G722.2 by the ITU-T) and provide speech transmission with a 50-7000 Hz bandwidth and a quality
very similar to the well-known G722. Automatic fallback to the standard coding takes place if the
network does not support the service or one of the terminals does not feature this capability.
In single codec mode, the mobile voice channel can be used for coordination.
Mobile IP mode
The other service available with mobile access is the data packet transmission mode, with IP protocol.
This mode brings similar capabilities as a wired IP connection via the Ethernet interface, as described
above in 2.3.1, with some distinctive characteristics:
This requires a subscription including access to the data service, with conditions compliant with
the application. Among other requirements, an APN (Access Point Name) must be provided
that allows this type of media stream.
Some operators provide such allowance in a “VoIP”
option.
The available bit rate depends on various factors; first the network technology
(2G/3G/3G+/4G…), but also the traffic level in the radio cell, the operator’s network capacity,
possibly the type of subscription. This may bring on restrictions for the usable compression
algorithms.
Setting a link implies first activating the data connection, before actually initiating an audio
stream transmission link.
Using an external USB module
Instead of the integrated module, it is possible to plug a USB mobile module or “key”, in order to access
mobile IP transmission, with more or less similar conditions as described above.
However be aware:
This capability is optional (but included with the “Mobile” option).
The USB module must be from the list of devices supported by AETA.
As this list is evolving,
please check our web site for up-to-date information.
The “HD Voice” mode is not available in this way.
USB devices do not feature antenna diversity.
