Hi That is not possible if you use the GSM as a modem since it talks a serial protocol (rs232/usb), not ethernet. You might need a serial/usb sniffer.
wireshark/tcpdump does "sniff" TCP packets. Regards Alvaro |-----------------------------------------------------------------------------------------------------------------| Envíe y Reciba Datos y mensajes de Texto (SMS) hacia y desde cualquier celular y Nextel en el Perú, México y en mas de 180 paises. Use aplicaciones 2 vias via SMS y GPRS online Visitenos en www.perusms.com On Tue, Sep 20, 2016 at 6:56 PM, DHC Admin <dhcad...@gmail.com> wrote: > If you know a tcpdump would do, why don't you use it? On a linux machine > you would do: tcpdump -w FILENAME.pcap -s 0 host XXX.XXX.XXX.XXX (for > example) then use wireshark software to read the resulting file from the > capture. > > Once on wireshark you can search for SMPP params, like phone number. > > hope this helps. > > On Tue, Sep 20, 2016 at 5:38 PM, Manuel García Cabrera < > mcabr...@contentamobile.com> wrote: > >> I have a SIM inside a GSM modem (Portech mv-374), and I need to see how >> an incoming SMS packet is formed. A tcpdump would do, but I don't know how >> to obtain that. Can someone point me in the right direction? >> >> >> >