GPRS connection under NEUTRINO

QNX Newsgroups (Archives) comp.os.qnx
1

Hi,

I have to make data connection to a private server (using its own protocol)
through GPRS network.
My question is:
Just after the “connect” GPRS modem message, what “NEUTRINO” process I have
to start to interface to connect a socket connection to my server ?

Thanks in advance

Patrice

2

Patrice <priou@bcisa.com> wrote:

I have to make data connection to a private server (using its own protocol)
through GPRS network.
My question is:
Just after the “connect” GPRS modem message, what “NEUTRINO” process I have
to start to interface to connect a socket connection to my server ?

GPRS is no different than any other “modem” out there. The cellular data
systems work in one or two ways, depending on the network and the “modem”
that is in use.

  1. Circuit switched mode
    This mode is typically implemented in an identical manner to a traditional
    “wired” or landline modem. Typically providing a Hayes AT command set.
    Connections need to be dialed like normal analog modems, and often do not
    provide connections faster than 9600.

  2. Packet switch mode
    This mode is typically the “always on” data connectivity mode and is
    often accompanies by an IP address. It is often implemented as a PPP or
    SLIP protocol stack. Connections may use a variant of the AT command
    set, typically ignoring any phone number in an ATD command and simply
    providing the PPP or SLIP protocal at that point. Connections are often
    at the highest rate available by the digital network.

If you are using the Circuit mode, then you can probably ignore the fact that
you are on a GPRS network and just treat the GPRS modem/phone as a normal
analog modem. You will need to connect to a modem on the other end or to
an ISP and run PPP to obtain an IP address.

If you are in Packet mode, then you typically just run PPP.

So, it sounds like you might be missing PPP in your setup.

Cheers,
Camz.