Verifying the Configured Minimum TLS Version of Unified CMĪnother possible cause of the request was aborted: Could not create SSL/TLS secure channel error is a mismatch between your client PC's configured cipher_suites values, and the values that the server is configured as being willing and able to accept. If your security needs require a higher version of TLS, reconfigure the system to use TLS 1.1 or 1.2. ** By default, CUCM 10 and above supports a minimum TLS version of 1.0. **Cisco Unified Communications Manager and IM and Presence Services, release 9.x supports TLS 1.0 only. We can enable/disable TLS version in the PhoneView config file ("C:\Program Files (x86)\UnifiedFX\PhoneView\") Possible Solution:We need to change tls version in PhoneView config file so PhoneView will send same UCM TLS supported version request. Mismatched Transport Layer Security (TLS) version between client (PhoneView) and server (Cisco UCM)įor example, If PhoneView send a TLS1.0 SSL handshaking/negotiation request to Cisco UCM and if Cisco UCM configured with only TLS1.2 then we will get such error.
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