Allthough SfB is working great in our company, there is one thing that's keeping us busy. Turn off 'Missed conversation' emails. Voice and telephony features require a microphone and speakers, headset with microphone, or equivalent device compatible with the computer.Following ignite there’s a ton and awesome content and session recordings to watch so this today i saw Thomas Binders session on “Understanding Media Flows in Microsoft Teams and Skype for Business” and thought this should be a goodie.07:07 AM. Skype calling with Alexa is currently available in the US, the UK, Canada, India, Australia, New Zealand, France, Germany, Italy, Mexico and Spain.Skype For Business Mac Client We Couldn't Send This Message As Clear Computer hardware requirements are determined by the operating system and browser. Simply ask Alexa to call any of your Skype contacts or read a phone number out loud to call it. Reach friends, family or colleagues worldwide from your Amazon Alexa device.
![]() client sends packet to relay servers and allocates candidates and sends back packet and knows my public ip is this and then client knows this is my public ip and maybe i can accept traffic there also same time helps us find our public ip address and will allows net to allow incoming traffic Now we have STUN and TURN server these are servers and function as a relay if client wants to talk to someone but cant it can use stun and turn server as relays Windows play money poker for widows and macCandidate discovery – once i know where i can be reached i send to client3. based on endpoint location and privacy boundariesBased on ECMP and how can easily distribute load2. and closest servers is always used with least hops Transport relays uses different UDP port per workloadsTransport Relay in progress with SfB but is in use with Teams first candidate is always the local interface address You need to trust the certificate and it does a man in the middle attack.Charles web proxy, Charles has a sequence view and structure viewAddress is not a fqdn its an IP Address, different to media relay Office365 should always have this!”"Next Service request and there is a relay configure with credentialsHere’s the credentials and used its own certificate to create this and if relay used it will present thisLearn what media relay is, username and password and ports to useOnly one relay listed and Office365 will only show external media relayThat’s was for SfB but for Teams its more tricky!For teams there’s is no nice tools to read logs, all traffic is https and sometimes web socket. Candidate promotion selects best media pathSign into service, from signalling learn a relay configured for meSfB Online using Media relay or Lync 2010, Lync 2010 always uses media relayShows different sip dialogs and left SIP header and on the right the detailsFirst incoming 200 OK – in band provisioningInterested in MRAS, here we have a relay configured. Skype For Business We Couldn'T Send This Message How To Encrypt Thethen person picks up and this is the endpoint were talking to.We can see here Martin calls Thomas by the inviteWe can see this was an audio call and the candidatesFirst one are 1 and 1 candidate come in pairs, one for RTP and one for RTCPThen priority – the higher the number the more i want to use this candiateHere we have host and we know this is the local ip address of the endpoint!There srvflx raddress this is where i send a packet to the relay and the relay says the address is the followingThen the ip address matches host address and relays says when you send messages from 192.168.1.110 the address is coming from 91.205.175.103If i can establish direct connection or srvflx address other may be able to talk to my relay addressTCP passive will be able to received traffic as well, active and passive will match each otherNow theres session progress 183 session progress – back from called progress and here my informationAnd the other coming from SfB but an android PhoneUser has more than one device we establish media session with all of themNow incoming packets there are no more pairsHere we have rctp mux (multiplexing) so i send old version and hey i know the new version as well.And another thing that’s interesting is the encryption, so we can see hear cypto and suite and key this is how the two endpoints encrypt the traffic they will via the secure signalling channel and let each other know which cipher and only the two endpoints know how to encrypt the traffic, the relay never sees this and just passes them on.MRAS allow endpoints to allocate candidatesNow each one know where the other one can be reached and will determine all possible udp and tcp ports pairingFor SfB relay can bridge TCP and UDP, is SfB can only talk TCP and the other UDP and TCP the whole call needs to be TCP. then other endpoint will do the same with where they can be reached
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