Here is a sample of when the call loses audio.
020-02-17T13:22:30 938042108mS VOIP: (In) 0a0200660001af5a 2.110426.1 26186 SIPTrunk Endpoint: RearrangeFSProposal 2->2
2020-02-17T13:22:30 938042108mS VOIP: (In) 0a0200660001af5a 2.110426.1 26186 SIPTrunk Endpoint: RearrangeFSProposal 4->4
2020-02-17T13:22:30 938042108mS VOIP: (In) 0a0200660001af5a 2.110426.1 26186 SIPTrunk Endpoint: OnRenegotiate from stack in local LCRIdle, remote LCRIdle, pause is 0 (fs f1f39b98, size 2), renego 1 mh_ch 0 relay 1 resp 1 stream_ch 0 sec_ch 0 dtmf_ch 0 t
38_shuff 0
2020-02-17T13:22:30 938042108mS VOIP: (In) 0a0200660001af5a 2.110426.1 26186 SIPTrunk Endpoint: ... OnRenegotiate caps_fs f1f4d550 size 4 caps_sec 0 size -1
2020-02-17T13:22:30 938042109mS VOIP: (In) 0a0200660001af5a 2.110426.1 26186 SIPTrunk Endpoint: SetRenegotiateState remote LCRIdle -> LCRIdle
2020-02-17T13:22:30 938042109mS VOIP: (In) 0a0200660001af5a 2.110426.1 26186 SIPTrunk Endpoint: CMMediaSession::IsMappable to other media session, sessions don't use same codecs
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: RearrangeFSProposal 2->2
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (SetOutSec) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: ProcessOutboundFastStart LCMediaConnected --- caps_fs f1f4d550 caps_sec 0
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: OnRenegotiate to stack in local LCRIdle, remote LCRIdle, pause is 0 (fs f1f39b98, size 2), renego 1 mh_ch 0 relay 1 resp 1 stream_ch 0 sec_ch 0 dtmf_ch 0 t38
_shuff 0
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: ... OnRenegotiate caps_fs f1f4d550 size 4 caps_sec 0 size -1
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: IsRenegoFSCompatible: choose a common cap 0
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (OnFs inb) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (OnFS out) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (OnFs inb) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (OnFS out) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: SetRenegotiateState local LCRIdle -> LCRIdle
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: CMMediaSession::IsMappable to other media session, sessions don't use same codecs
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: ProcessOutboundFastStart other IsSipFullCapsInProgress
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: ProcessOutboundFastStart, respond 1 responded 0 forward 1 other_waits_for_response 0
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: ProcessOutboundFastStart, not responded to reinvite
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (SetOutSec) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS VOIP: (Out) 0a0200660001af5c 603.110428.0 26186 Joshua Brooks.0: AssertSecKey (ProcOutFS) reasserted TX key lCG5DBQhMkPVb45lJvyLVKrolB/xj5FCuFp4DMxl crypto 0 MKI 0:0 (previous MKI 0:0)
2020-02-17T13:22:30 938042109mS CMExtnTxC: v=5285