RTP communication occurs but call drops due to "lack of rtp activity in 33 seconds"

Hello,

I call between two endpoints, 23 (IP: 192.168.200.210) & 24 (IP: 192.168.200.220), and RTP messages appear to be sent between the two endpoints. However the call drops afterwards with the message Disconnecting channel 'PJSIP/23-0000005a' for lack of audio RTP activity in 33 seconds. I am attaching the information attained using pjsip set logger on rtp set debug on

Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004814, ts 238240, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004815, ts 238400, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004816, ts 238560, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030402, ts 238240, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030403, ts 238400, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030404, ts 238560, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004817, ts 238720, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004818, ts 238880, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004819, ts 239040, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030405, ts 238720, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030406, ts 238880, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030407, ts 239040, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004820, ts 239200, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004821, ts 239360, len 000160)                               
Got  RTP packet from    192.168.200.220:4024 (type 00, seq 004822, ts 239520, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030408, ts 239200, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030409, ts 239360, len 000160)                               
Sent RTP packet to      192.168.200.210:4000 (type 00, seq 030410, ts 239520, len 000160)                               
[2022-08-23 22:17:13] NOTICE[1192]: res_pjsip_sdp_rtp.c:148 rtp_check_timeout: Disconnecting 
channel 'PJSIP/23-0000005a' for lack of audio RTP activity in 33 seconds                                                                               
-- Channel PJSIP/23-0000005a left 'simple_bridge' basic-bridge <4bfc7d83-381d-4b2d-9fba-
5262d5131055>                   
-- Channel PJSIP/24-0000005b left 'simple_bridge' basic-bridge 
<4bfc7d83-381d-4b2d-9fba-5262d5131055>                 
== Spawn extension (macro-dial-one, s, 55) 
exited non-zero on 'PJSIP/23-0000005a' in macro 'dial-one'                   
== Spawn extension (macro-
exten-vm, s, 14) exited non-zero on 'PJSIP/23-0000005a' in macro 'exten-vm'                 
<--- Transmitting SIP request (456 bytes) to UDP:192.168.200.220:5060 --->                                              
BYE sip:[email protected]:5060;ob SIP/2.0                                                                              
Via: SIP/2.0/UDP 192.168.200.200:5060;rport;branch=z9hG4bKPjffd17bc0-f574-4e73-aa78-23feb6bc929f                        
From: "23" <sip:[email protected]>;tag=ad36e13e-bc74-4a55-9bd8-0447d86a56f2                                            
To: <sip:[email protected];ob>;tag=RU45kib3Ls90mB34gZg3t0m5iXi4exO3                                                    
Call-ID: 287f6d32-32fe-4788-93e8-e2a73447f39f                                                                           
CSeq: 11286 BYE                                                                                                         
Reason: Q.850;cause=44                                                                                                  
Max-Forwards: 70                                                                                                        
User-Agent: FPBX-15.0.16.75(16.13.0)                    

I can’t attach the whole log due to chachter limit. So, I thought to paste the last part only.

Any help is highly appreciated.

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