Hi! There seems to be now quite a bit of modems appearing now that does not support the old method of using PPP protocol on the same tty device as the AT commands are sent, or it is not recommended for higher HSPA+ and LTE modems because of performance limitations of the PPP/tty layer. Those devices typically accept AT commands at one interface and use another interface for the network traffic (including first a DHCP query).
One example is the Samsung GT-B3730 I'm currently developing drivers for: https://github.com/mkotsbak/Samsung-GT-B3730-linux-driver It seems to be the same case for LG VL600 4G (LTE): http://ubuntuforums.org/showpost.php?p=10589647&postcount=17 https://github.com/balrog-kun/LG-VL600-utils The Ericsson Mobile Broadband Modules (I have an F5521gw based modem) seems to offer both the old ACM ports and support USB WCM / CDC NCM / CDC Ethernet protocols for higher performance: http://www.thinkwiki.org/wiki/Ericsson_F3507g_Mobile_Broadband_Module#Connecting_to_the_net_via_CDC_Ethernet_interface http://sourceforge.net/apps/mediawiki/mbm/index.php?title=MBM#Prerequisites http://cateee.net/lkddb/web-lkddb/USB_NET_CDC_NCM.html I wonder if support for this has been implemented or thought about in Modem-/NetworkManager. We probably need a flag for a modem manager module to tell that it does not use PPP and require to get IP address using DHCP instead. Else those devices benefit from the code in modem manager (and should be classified as such to the user as well), like the PIN unlocking, signal strength (typically found on the same device as dialling happened, since network traffic flow on a separate interface) etc. The configuration tab for PPP could be hidden for those devices. For devices offering multiple ways to connect, the modem manager module should probably find the best performing according to the available kernel modules and use that method. -- Marius Kotsbak _______________________________________________ networkmanager-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/networkmanager-list
