Russian adventures OpenBTS

(Russian version of the post here)

Some time ago at OpenBTS and gnuradio Mailing lists We announced a new Universal clocking Board for usrp. One of it's ample features is an ability to drive USRP at 52MHz with enough stability to run OpenBTS smoothly. This week we finally received manufactured PCBs and are in process of preparing testing samples. Main batch of PCB will be passed to population soon and we hope to make them available for shipping in the beginning of December.

Here are some PCB pictures for now:

Universal Clocking Unit for USRP - PCB

Universal Clocking Unit for USRP is so tiny with all its features!

Universal Clocking Unit for USRP - positioning

(Native English version is here)

Some time ago on the mailing lists and OpenBTS GnuRadio we announced a universal reference (clock) generator for the USRP, which can be used, including, and to clock the USRP to 52MGts - recommended mode for OpenBTS. This week we finally received payment from the factory and will soon begin the installation of the first test specimens. Willing to pay, I hope we will be able to invite all wishing somewhere in early December. :)

And yet - a few photos:

The reference generator for the USRP - PCB

The reference generator for the USRP has turned out quite tiny

The reference generator for the USRP - about how he will be placed on USRP.

After announcing to all his friends collecting old phones, we began to collect his clothing collection. And behold, they brought us a miracle. Car GSM-phone from Motorola, judging by the internet are staged in the old BMW. And maybe other cars. But looks impressive: solid metal casing, the abundance of discrete components, power components. Power seems to have had a maksmalnaya - 8W. SIM-card is used more full-size, the size of a standard smart card (receiver for him is a picture to the right, under the board, poukrugly prominence in the case - this cavity to the fingers, the better to get it).

It is a pity that we got it without the tube. Since the buttons and display located on it, then without handset completely functional. Friends, if someone has lying around the tube to such a phone - please come with her to visit us! :)

And now this photo:

Motorola SUF1321A car-phone inside

Motorola SUF1321A car-phone bottom

Released bug-fix release OpenBTS 2.4.1, which includes a pack of my bug fixes, memory access and a patch from Christian Meier to fix a bug in the formation of SMS.

Version available for download archive or via SourceForge svn.

And we turn to catching bugs in the upcoming 2.5, to accelerate its release in open access.