Re: org.freedesktop.ModemManager.Modem.Gsm.Network.NetworkMode signal

[Dan Williams <dcbw redhat com>]

On Tue, 2008-09-30 at 16:58 +0100, Stuart Ward wrote:
>         
>         
>         Because there is no case where a modem supports HSUPA but not
>         HSDPA, and
>         thus HSUPA and HSPA are essentially equal.  Since HSPA _is_
>         HSDPA +
>         HSUPA, it's pointless to have a separate HSUPA.
> 
> This signal is sent by the modem to the computer to indicate the
> capability of the connection. So this is athe result of the
> negociation of the modem with the network to see what is supported. So
> even if the modem supports HSUPA the network may not, equally with
> HSDPA

Right, but wouldn't that just mean the modem would send HSDPA or EDGE
then?

> It is possible that an operator will offer different network
> capabilities to subs and it may be that HSUPA is supported but not
> HSDPA. 

Highly doubtful; but I guess it's possible.

> Dose that clarify the situation?

Yes, but the values in question are an enum and not a bitfield.  If you
think it's really likely that HSUPA would be provided but not HSDPA,
then I guess it might be approprate to have both HSUPA and HSPA
separately.

Dan