Webinar Talk Series # 77 titled “Audio Visual & Unified Communications” was held on 28th November 2021 Sunday from 06.00 PM to 07.30 PM IST. Mr.Sethuraman B Alumnus 2009/ Electronics and Communication Engineering was the guest speaker of the occasion. Around 75 participants joined the webinar across the globe using the WebEX Application. Mr.S.Vasanth Kumar, President, SREC AA welcomed the guest and the global audiences to the webinar talk series. The Speaker explained the concepts involved in audio and visual communications. Dr.C.J.Thomas Renald, Secretary, SREC AA thanked the guest and the audience for sparing time and thought to make this webinar a grand success during the closing remarks.