При входящем, с АТС LG, звонке абоненты не слышат друг друга.
при исходящем звонке все друг друга слышат.
в системный логах выглядит всё вот так
[2022-07-01 11:30:55] WARNING[4582] res_pjsip_session.c: PJSIP/SIP-1655293247-000006d4: Unable to merge media states
[2022-07-01 11:31:30] WARNING[22853] res_pjsip_session.c: PJSIP/538-000006d6: Unable to merge media states
[2022-07-01 11:32:39] WARNING[15120] res_pjsip_session.c: PJSIP/550-000006d8: Unable to merge media states
[2022-07-01 11:40:03] Asterisk 16.16.2 built by root @ on a x86_64 running Linux on 2022-04-17 14:15:10 UTC
[2022-07-01 11:48:54] WARNING[4582] res_pjsip_session.c: PJSIP/SIP-1655293247-000006f3: Unable to merge media states
[2022-07-01 11:49:45] WARNING[22853] res_pjsip_session.c: PJSIP/SIP-1655293247-000006f7: Unable to merge media states
[2022-07-01 11:58:48] WARNING[15120] res_pjsip_session.c: PJSIP/537-00000701: Unable to merge media states