{"id":24,"date":"2009-04-12T21:35:56","date_gmt":"2009-04-12T21:35:56","guid":{"rendered":"http:\/\/clayb.net\/blog\/?p=24"},"modified":"2012-05-04T19:37:58","modified_gmt":"2012-05-04T19:37:58","slug":"im-connected-through-the-aether-well-using-1900mhz-cellular","status":"publish","type":"post","link":"https:\/\/clayb.net\/blog\/im-connected-through-the-aether-well-using-1900mhz-cellular\/","title":{"rendered":"I’m connected through the aether! (Well using 1900Mhz — cellular)"},"content":{"rendered":"

Cingular cellular using a Lenovo X200 and Ericcson F3507g built-in cellular modem<\/h1>\n

Background<\/h2>\n

Internet connectivity is necessary in this day and age, especially for an engineer at Sun! So, one day at my Father’s house I was playing with his Sierra Wireless USB dongle and not succeeding at figuring out what to do without internet (this<\/a> might help for those with one), but I remembered my work Lenovo X200<\/a> had a Cingular capable WWAN (Wireless Wide Area Network) card.<\/p>\n

<\/p>\n

Basic Solaris Implementation<\/h2>\n

So, I pulled the battery on the Lenovo and stuck the SIM card in from the Sierra Wireless dongle. From this point I fired up the Solaris Device Driver Utility (Applications->System Tools->Device Driver Utility or \/usr\/bin\/python \/usr\/ddu\/ddu.py<\/tt>). The DDU told me that the usbsacm<\/a> driver was attached (actually twice and why, I’m not sure) which meant Solaris could talk to the card okay. To confirm I fired up tip(1)<\/a> and typed ATZ<\/tt> which on a modem will usually give OK<\/tt> meaning all’s well and the modem’s ready to accept further commands to setup a data call. The Ericsson didn’t respond OK<\/tt> but instead ERROR<\/tt>, this required some digging…<\/p>\n

Modem\/PPP Setup<\/h2>\n

Since, the modem wasn’t in the right state to accept AT commands<\/a> I looked around for what was up. The Ericsson F3507g has a offline and online mode. The command to bring the modem online is AT+CFUN=1<\/tt> and sure enough the wireless modem light on the Lenovo lit up green (yes, AT+CFUN=0<\/tt> turns it off again). This was a good sign!<\/p>\n

Next, was setting up the files to run pppd(1)<\/a>. I usually use as a template, the instructions on the page<\/a> for the OpenSolaris WWAN Project (see the “Configuration” heading). Here was no exception, however, I found that some things were going to be special for the Ericsson modem and Cingular. Thus I would have custom \/etc\/ppp\/peers\/evdo<\/tt> and \/etc\/ppp\/evdo-chat<\/tt> files (and as it turns out a custom \/etc\/ppp\/chap-secrets<\/tt> file). Indeed I did, they’re available below (to use also make a symlink for the modem to \/dev\/evdo<\/tt> — usually pfexec ln -s \/dev\/term\/0 \/dev\/evdo<\/tt>):<\/p>\n