Hello Suyog,
Even though you have transferred the call to a third party, depending on your Trunk settings, the call may not be fully disconnected. I would recommend that you take a look at the Release Link Transfer sections in the following Resource Center articles:
https://help.mypurecloud.com/articles/transfer-external-number-2/
https://help.mypurecloud.com/articles/transfer-to-number-action/
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Jason Kleitz
Online Community Manager/Moderator
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