Now my other SIP devices can link into the conference, but the status display is connected and there is no sound, but everything looks normal on the other devices and has joined the conference,Have you encountered such a problem?

Now my other SIP devices can link into the conference, but the status display is connected and there is no sound, but everything looks normal on the other devices and has joined the conference,Have you encountered such a problem?And communication with other sip devices is normal.

2020-03-19 17:19:08.176 严重: [4240] impl.protocol.sip.SipMessageFactory.throwOperationFailedException().2652 Failed to create INVITE request.
javax.sip.SipException: Dialog not yet established – no response!
at gov.nist.javax.sip.stack.SIPDialog.createRequest(SIPDialog.java:2328)
at net.java.sip.communicator.impl.protocol.sip.SipMessageFactory.createRequest(SipMessageFactory.java:696)
at net.java.sip.communicator.impl.protocol.sip.CallPeerSipImpl.sendReInvite(CallPeerSipImpl.java:1429)
at net.java.sip.communicator.impl.protocol.sip.CallPeerSipImpl.sendReInvite(CallPeerSipImpl.java:1411)
at net.java.sip.communicator.impl.protocol.sip.CallSipImpl.reInvite(CallSipImpl.java:694)
at net.java.sip.communicator.impl.protocol.sip.CallSipImpl.conferenceFocusChanged(CallSipImpl.java:183)
at net.java.sip.communicator.service.protocol.media.MediaAwareCall.propertyChange(MediaAwareCall.java:865)
at org.jitsi.utils.event.PropertyChangeNotifier.firePropertyChange(PropertyChangeNotifier.java:126)
at net.java.sip.communicator.service.protocol.CallConference.conferenceFocusChanged(CallConference.java:509)
at net.java.sip.communicator.service.protocol.media.MediaAwareCallConference.conferenceFocusChanged(MediaAwareCallConference.java:243)
at net.java.sip.communicator.service.protocol.CallConference.setConferenceFocus(CallConference.java:941)
at net.java.sip.communicator.service.protocol.CallConference.callAdded(CallConference.java:430)
at net.java.sip.communicator.service.protocol.CallConference.addCall(CallConference.java:333)
at net.java.sip.communicator.service.protocol.Call.setConference(Call.java:557)
at net.java.sip.communicator.service.protocol.media.MediaAwareCall.setConference(MediaAwareCall.java:975)
at org.jitsi.jigasi.SipGatewaySession.onConferenceCallStarted(SipGatewaySession.java:579)
at org.jitsi.jigasi.SipGatewaySession.onConferenceCallInvited(SipGatewaySession.java:467)
at org.jitsi.jigasi.JvbConference$JvbCallListener.incomingCallReceived(JvbConference.java:1085)
at net.java.sip.communicator.service.protocol.media.AbstractOperationSetBasicTelephony.fireCallEvent(AbstractOperationSetBasicTelephony.java:208)
at net.java.sip.communicator.service.protocol.media.AbstractOperationSetBasicTelephony.fireCallEvent(AbstractOperationSetBasicTelephony.java:167)
at net.java.sip.communicator.impl.protocol.jabber.CallJabberImpl.processSessionInitiate(CallJabberImpl.java:1135)
at net.java.sip.communicator.impl.protocol.jabber.OperationSetBasicTelephonyJabberImpl$2.run(OperationSetBasicTelephonyJabberImpl.java:1099)
2020-03-19 17:19:08.177 信息: [4240] org.jitsi.jigasi.SipGatewaySession.onConferenceCallStarted().581 [ctx=15846095468271979338489] Created outgoing call to SipGatewaySession{sipCall=Call: id=1584609548173501902288 peers=1, destination=‘103’}
2020-03-19 17:19:08.269 严重: [4252] org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.log() Failed to connect this DTLS client to a DTLS server!
java.io.IOException: org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl is closed!
at org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl.assertNotClosed(DatagramTransportImpl.java:124)
at org.jitsi.impl.neomedia.transform.dtls.DatagramTransportImpl.send(DatagramTransportImpl.java:477)
at org.bouncycastle.crypto.tls.DTLSRecordLayer.sendRecord(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSRecordLayer.send(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSReliableHandshake$RecordLayerBuffer.sendToRecordLayer(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSReliableHandshake.writeHandshakeFragment(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSReliableHandshake.writeMessage(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSReliableHandshake.resendOutboundFlight(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSReliableHandshake.receiveMessage(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSReliableHandshake.receiveMessageBody(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSClientProtocol.clientHandshake(Unknown Source)
at org.bouncycastle.crypto.tls.DTLSClientProtocol.connect(Unknown Source)
at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.runInConnectThread(DtlsPacketTransformer.java:1006)
at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer.access$000(DtlsPacketTransformer.java:40)
at org.jitsi.impl.neomedia.transform.dtls.DtlsPacketTransformer$1.run(DtlsPacketTransformer.java:1272)
2020-03-19 17:19:08.295 信息: [109] org.jitsi.jigasi.JvbConference.callStateChanged().1111 [ctx=15846095468271979338489] JVB conference call IN_PROGRESS.