Hello everyone

I have a doubt here from the DSP side, might be a silly one. While transmitting the classmark or any message from mobile on SDCCH during a call, does it transmit on the frequency we get after converting the ARFCN or is there a slight variation ?

BR

Snehasish

________________________________ From: baseband-devel baseband-devel-bounces@lists.osmocom.org on behalf of Vadim Yanitskiy axilirator@gmail.com Sent: Wednesday, December 6, 2017 8:19:55 PM To: f12.sebastian@gmail.com Cc: baseband-devel Subject: Re: Classmark Testing

Hi Sebastian,

My query is : my test network is supporting A5/1,2,3. Is it feasible to set A5/1 on MS1 (though it supports A5/2 and A5/3 also) and A5/2 for MS2 (though it supports A5/1 and A5/3 also) for a call in between them using "Early Classmark Sending" ???

I think it will work without any problems because the A5/X encryption is not 'end-to-end' (in our case MS-to-MS), but there are two separate encrypted sessions between MS1-BTS and MS2-BTS.

With best regards, Vadim Yanitskiy.