3CX SBC audio issue

[Azersigorta]

I have 18 version 3cx. An external Fanvil x5u phone is connected via SBC. The phone is registered but doesnt any voice when call each other
How can I solve the problem? please help
SBC logs:
STACK | 20230526-163353.347 | 3CX | SBC | 1788 | security.cpp:835 | Packet of size 8 is at pos 1
DEBUG | 20230526-163353.347 | 3CX | SBC | 1788 | security.cpp:815 | Sent keep-alive. Stats: 15276 KA sent, 15625 KA received
STACK | 20230526-163353.347 | 3CX | SBC | 1788 | security.cpp:765 | Ready to send, send q size = 1
STACK | 20230526-163353.347 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: TX version=0, content=0x100 (SSL3_RT_HEADER), msg=0x17 (Unknown), len=5
STACK | 20230526-163353.347 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: TX version=0x304, content=0x101 (Unknown), msg=0x17 (Unknown), len=1
STACK | 20230526-163353.347 | 3CX | SBC | 1788 | security.cpp:379 | TLS DATA: TX 8 bytes
STACK | 20230526-163353.737 | 3CX | SBC | 1788 | TunnelUdp.cpp:87 | RX UDP PING 4 bytes
STACK | 20230526-163353.737 | 3CX | SBC | 1788 | TunnelUdp.cpp:308 | TX UDP PONG 32 bytes
STACK | 20230526-163353.769 | 3CX | SBC | 1788 | security.cpp:420 | TLS (state=3) reading, qsize=0
STACK | 20230526-163353.769 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: RX version=0, content=0x100 (SSL3_RT_HEADER), msg=0x17 (Unknown), len=5
STACK | 20230526-163353.769 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: RX version=0x304, content=0x101 (Unknown), msg=0x17 (Unknown), len=1
STACK | 20230526-163353.769 | 3CX | SBC | 1788 | security.cpp:431 | TLS DATA: RX 4 bytes of header
STACK | 20230526-163353.769 | 3CX | SBC | 1788 | security.cpp:450 | TLS DATA: RX 4/4 bytes of frame
DEBUG | 20230526-163353.769 | 3CX | SBC | 1788 | security.cpp:1047 | Keep-alive received
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:835 | Packet of size 8 is at pos 1
DEBUG | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:815 | Sent keep-alive. Stats: 15277 KA sent, 15626 KA received
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:765 | Ready to send, send q size = 1
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: TX version=0, content=0x100 (SSL3_RT_HEADER), msg=0x17 (Unknown), len=5
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: TX version=0x304, content=0x101 (Unknown), msg=0x17 (Unknown), len=1
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:379 | TLS DATA: TX 8 bytes
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:835 | Packet of size 8 is at pos 1
DEBUG | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:815 | Sent keep-alive. Stats: 15278 KA sent, 15626 KA received
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:765 | Ready to send, send q size = 1
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: TX version=0, content=0x100 (SSL3_RT_HEADER), msg=0x17 (Unknown), len=5
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: TX version=0x304, content=0x101 (Unknown), msg=0x17 (Unknown), len=1
STACK | 20230526-163358.378 | 3CX | SBC | 1788 | security.cpp:379 | TLS DATA: TX 8 bytes
STACK | 20230526-163358.738 | 3CX | SBC | 1788 | TunnelUdp.cpp:87 | RX UDP PING 4 bytes
STACK | 20230526-163358.738 | 3CX | SBC | 1788 | TunnelUdp.cpp:308 | TX UDP PONG 32 bytes
STACK | 20230526-163359.769 | 3CX | SBC | 1788 | security.cpp:420 | TLS (state=3) reading, qsize=0
STACK | 20230526-163359.769 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: RX version=0, content=0x100 (SSL3_RT_HEADER), msg=0x17 (Unknown), len=5
STACK | 20230526-163359.769 | 3CX | SBC | 1788 | security.cpp:190 | TLS PROT: RX version=0x304, content=0x101 (Unknown), msg=0x17 (Unknown), len=1
STACK | 20230526-163359.769 | 3CX | SBC | 1788 | security.cpp:431 | TLS DATA: RX 4 bytes of header
STACK | 20230526-163359.769 | 3CX | SBC | 1788 | security.cpp:450 | TLS DATA: RX 4/4 bytes of frame
DEBUG | 20230526-163359.769 | 3CX | SBC | 1788 | security.cpp:1047 | Keep-alive received