Your chatroom functionality may be limited due to an outage" client error after adding new Central site to SfB topology
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47) Resource unavailable, unspecified disconnection cause for both side call via SIP - Cisco Community
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VoIP/SIP 481 Call Leg/Transaction Does Not Exist (AUD-560) · Issue #209 · espressif/esp-adf · GitHub
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REFER throwing `481 Call Leg/Transaction Does Not Exist` · Issue #6 · sippy/go-b2bua · GitHub
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Solved: Transfer or transferred call drops with 481 - Adtran Support Community
sipxcom-users - Google Groups
Lync 2013 and Office 365 voicemail calls failing with 481 call leg does not exist – irrationale
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Cannot tranfer PSTN Skype calls: sip 481. Cal Leg/Transaction does not exist
Alexandr Engineer VoIP: sip 481 call/transaction does not exist
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Lync 2013 and Office 365 voicemail calls failing with 481 call leg does not exist – irrationale
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47) Resource unavailable, unspecified disconnection cause for both side call via SIP - Cisco Community
A Deep Dive into Logging Out a SIP Client | Tao, Zen, and Tomorrow
