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Skype for Business calls Dropping

My Skype calls keeps dropping and my firewall seems to be open and not blocking and IP's but not sure why it is happening. using Windows 8 and Windows 10, below is the event viewer log for the drop

A SIP request made by Lync failed in an unexpected manner (status code 0). More information is contained in the following technical data:

RequestUri: sip:le@domain.com;opaque=user:epid:c-Z1XxZYuF2SoQ_DmcqMQQAA;gruu
From: sip:fe@domain.com;tag=6c92abcc48
To: sip:le@domain.com;tag=d3667f6533
Call-ID: cc7e196447a7452da9f1cd37a10c46cb
Content-type: application/sdp;call-type=audiovideo

v=0
o=- 0 1 IN IP4 192.168.11.8
s=session
c=IN IP4 192.168.11.8
b=CT:99980
t=0 0
a=x-mediabw:main-video send=12000;recv=6000
a=x-devicecaps:audio:send,recv;video:send,recv
m=audio 50016 RTP/SAVP 117 104 114 9 112 111 0 8 103 116 115 97 13 118 119 101
a=x-ssrc-range:2366243840-2366243840
a=rtcp-fb:* x-message app send:dsh recv:dsh
a=rtcp-rsize
a=label:main-audio
a=x-source:main-audio
a=ice-ufrag:lMRF
a=ice-pwd:NRfxyT94UfaOKMah0ivGn64M
a=candidate:1 1 UDP 2130706431 192.168.110.108 50016 typ host
a=crypto:2 AES_CM_128_HMAC_SHA1_80 inline:u8hhtI31pTcM6xYS3Zi42CZkGCJ2sFqvY8wcve7I|2^31|1:1
a=remote-candidates:1 192.168.114.68 50002 2 192.168.114.68 50002
a=maxptime:200
a=rtpmap:117 G722/8000/2
a=rtpmap:104 SILK/16000
a=fmtp:104 useinbandfec=1; usedtx=0
a=rtpmap:114 x-msrta/16000
a=fmtp:114 bitrate=29000
a=rtpmap:9 G722/8000
a=rtpmap:112 G7221/16000
a=fmtp:112 bitrate=24000
a=rtpmap:111 SIREN/16000
a=fmtp:111 bitrate=16000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:103 SILK/8000
a=fmtp:103 useinbandfec=1; usedtx=0
a=rtpmap:116 AAL2-G726-32/8000
a=rtpmap:115 x-msrta/8000
a=fmtp:115 bitrate=11800
a=rtpmap:97 RED/8000
a=rtpmap:13 CN/8000
a=rtpmap:118 CN/16000
a=rtpmap:119 CN/24000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=rtcp-mux
a=ptime:20
a=extmap:1 http:\http://www.webrtc.org\experiments\rt...\abs-send-time
m=video 50030 RTP/SAVP 122 121 123
a=x-ssrc-range:2366243841-2366243940
a=rtcp-fb:* x-message app send:src,x-pli recv:src,x-pli
a=rtcp-rsize
a=label:main-video
a=x-source:main-video
a=ice-ufrag:wPN4
a=ice-pwd:qjLdXqktYRu0pkh3yQaCA9X2
a=x-caps:121 263:1920:1080:30.0:2000000:1;4359:1280:720:30.0:1500000:1;8455:640:480:30.0:600000:1;12551:640:360:30.0:600000:1;16647:352:288:15.0:250000:1;20743:424:240:15.0:250000:1;24839:176:144:15.0:180000:1
a=candidate:1 1 UDP 2130706431 192.168.11.8 50030 typ host
a=crypto:2 AES_CM_128_HMAC_SHA1_80 inline:u8hhtI31pTcM6xYS3Zi42CZkGCJ2sFqvY8wcve7I|2^31|1:1
a=remote-candidates:1 192.168.11.68 50021 2 192.168.11.68 50021
a=rtpmap:122 X-H264UC/90000
a=fmtp:122 packetization-mode=1;mst-mode=NI-TC
a=rtpmap:121 x-rtvc1/90000
a=rtpmap:123 x-ulpfecuc/90000
a=rtcp-mux
a=extmap:1 http:\http://www.webrtc.org\experiments\rt...\abs-send-time

Response Data:

101 Progress Report
ms-diagnostics: 13004;reason="Request was proxied to one or more registered endpoints";source="BL20A26FES04.INFRA.LYNC.COM";Count="2";appName="InboundRouting"

180 Ringing

180 Ringing

183 Session Progress

183 Session Progress

0 (null)
(null): 34; reason="Call terminated on a mid-call media failure where both endpoints are remote";UserType="Callee";MediaType="audio";MediaChanBlob="NetworkErr=time out,ErrTime=3693743000008,RTPSeq=0,SeqDelta=0,RTPTime=3693742700588,RTCPTime=3693742970028,TransptRecvErr=0x0,RecvErrTime=0,TransptSendErr=0x0,SendErrTime=0,InterfacesStall=0x2,InterfacesConnCheck=0x2,MediaTimeout=0,BlobVer=1";BaseAddress="192.168.11.68:50012";LocalAddress="192.168.11.68:50002";LocalSite="91.238.123.128:50012";NetworkName="nextjump.com";RemoteAddress="192.168.11.8:50016";RemoteSite="132.245.0.9:48956";MediaEpBlob="ICEWarn=0x400000,ICEWarnEx=0x0,LocalMR=52.112.0.63:50511,RemoteMR=132.245.0.42:58833,PortRange=50000:50019,LocalMRTCPPort=52875,RemoteMRTCPPort=58833,LocalLocation=1,RemoteLocation=1,FederationType=0,StunVer=2,CsntRqOut=60,CsntRqIn=60,CsntRspOut=60,CsntRspIn=59,Interfaces=0x2,BaseInterface=0x2,Protocol=0,LocalInterface=0x2,LocalAddrType=0,RemoteAddrType=0,IceRole=2,RtpRtcpMux=1,AllocationTimeInMs=414,FirstHopRTTInMs=76,TransportBytesSent=889,TransportPktsSent=29,IceConnCheckStatus=4,PrelimConnChecksSucceeded=1,IceInitTS=3693742694085,ContactSrvMs=382,AllocFinMs=485,FinalAnsRcvMs=1,FirstPathMs=5475,ReinviteRcvMs=6688,AckReinviteSntMs=6730,FCsntRqSntMs=6779,FCsntRqRcvMs=7169,LCsntRqSntMs=303568,LCsntRqRcvMs=303998,BlobGenTime=3693743000190,MediaDllVersion=6.0.8953.259,BlobVer=1";MediaMgrBlob="MrDnsE=mediaedge0A.online.lync.com,MrResE=1,MrErrE=0,MrBgnE=36937426940491984,MrEndE=36937426940574816,MrDnsI=sipedgeBL20A.infra.lync.com,MrResI=0,MrErrI=11001,MrBgnI=36937426940491824,MrEndI=36937426940536904,MrDnsCacheReadAttempt=0,BlobVer=1";OriginalPresenceState="0";CurrentPresenceState="0";MeInsideUser="No";ConversationInitiatedBy="0";SourceNetwork="0";RemotePartyCanDoIM="No"

Resolution:
If this error continues to occur, please contact your network administrator. The network administrator can use a tool like winerror.exe from the Windows Resource Kit or lcserror.exe from the Office Communications Server Resource Kit in order to interpret any error codes listed above.

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