hello, when reading gsm spec online i have understood that on an MT call the BTS pages the phone on the RR paging channel(PCH) the phone then asks for a channel in the RR channel request (RACH) the BTS replies with RR immediate assignment(AGCH) etc etc

Now I have tried to see a live example of this using osmocom-bb layer1/mobile + gsmtap/wirehshark

However I cannot figure out or see anywhere in these logs the *RR channel request (RACH) packet*. Does GSMTAP or OsmocomBB actually capture the RR channel request or am I missing something here??

the logs I get are like this

(CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) System Information Type 1 (CCCH) (RR) System Information Type 2 (CCCH) (RR) System Information Type 3 (CCCH) (SS) (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Paging Request Type 1 (CCCH) (RR) Immediate Assignment

and so on

Thanks!

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