“A trace shows completed TLS negotiation followed by the expected SIP exchange” evaluates a completed TCP three-way handshake does not prove the application-layer TLS negotiation can succeed. It would not confirm the collaboration outcome requiring sRTP media establishment requires compatible cryptographic negotiation beyond successful SIP signaling.

“A fresh identity assertion validates against the new certificate and the user signs in through SSO” evaluates a trust-relationship change can break SAML signatures without affecting local accounts. It would not confirm the collaboration outcome requiring sRTP media establishment requires compatible cryptographic negotiation beyond successful SIP signaling.

“A test user signs in through the approved identity provider and receives only the intended service role” evaluates sSO centralizes authentication but does not eliminate proper authorization mappings or token validation. It would not confirm the collaboration outcome requiring sRTP media establishment requires compatible cryptographic negotiation beyond successful SIP signaling.

“Validate LDAP directory connectivity, search base, filters and directory synchronization schedule” concerns lDAP lookup scope and synchronization filters determine which external identities are imported. The stated collaboration requirement instead depends on name resolution must return the correct service host and address before a phone can establish signaling.

“Verify voice VLAN connectivity and DHCP scope or relay, including required options for the deployment” concerns a phone cannot begin normal service discovery without working network-layer configuration. The stated collaboration requirement instead depends on name resolution must return the correct service host and address before a phone can establish signaling.

“Confirm target-version compatibility, run pre-upgrade checks, back up the cluster and sequence the supported node upgrades” concerns cluster upgrades must protect database and service continuity as well as software package installation. The stated collaboration requirement instead depends on name resolution must return the correct service host and address before a phone can establish signaling.

“A controlled eligible user appears once in the synchronized Cisco UCM directory” evaluates lDAP lookup scope and synchronization filters determine which external identities are imported. It would not confirm the collaboration outcome requiring name resolution must return the correct service host and address before a phone can establish signaling.

“The handset obtains the correct IP settings and discovers its supported provisioning service” evaluates a phone cannot begin normal service discovery without working network-layer configuration. It would not confirm the collaboration outcome requiring name resolution must return the correct service host and address before a phone can establish signaling.

“Replication returns to the supported healthy state and test registrations still work before advancing” evaluates continuing an upgrade with unhealthy cluster replication risks propagating inconsistent configuration. It would not confirm the collaboration outcome requiring name resolution must return the correct service host and address before a phone can establish signaling.

“Check CDP/LLDP voice-network advertisements and access-port VLAN policy together” concerns link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding. The stated collaboration requirement instead depends on clock skew can invalidate certificate- and assertion-based authentication even when hostnames match.

“Verify voice VLAN connectivity and DHCP scope or relay, including required options for the deployment” concerns a phone cannot begin normal service discovery without working network-layer configuration. The stated collaboration requirement instead depends on clock skew can invalidate certificate- and assertion-based authentication even when hostnames match.

“Deploy Cisco Unified Border Element at the supported SIP-to-SIP session border” concerns cUBE acts as a session border controller, unlike an Expressway pair used for collaboration traversal. The stated collaboration requirement instead depends on clock skew can invalidate certificate- and assertion-based authentication even when hostnames match.

“A handset learns the expected voice VLAN and registers from the correct subnet” evaluates link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding. It would not confirm the collaboration outcome requiring clock skew can invalidate certificate- and assertion-based authentication even when hostnames match.

“The handset obtains the correct IP settings and discovers its supported provisioning service” evaluates a phone cannot begin normal service discovery without working network-layer configuration. It would not confirm the collaboration outcome requiring clock skew can invalidate certificate- and assertion-based authentication even when hostnames match.

“A test user signs in through the approved identity provider and receives only the intended service role” evaluates sSO centralizes authentication but does not eliminate proper authorization mappings or token validation. It would not confirm the collaboration outcome requiring clock skew can invalidate certificate- and assertion-based authentication even when hostnames match.

“Check CDP/LLDP voice-network advertisements and access-port VLAN policy together” concerns link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding. The stated collaboration requirement instead depends on lDAP lookup scope and synchronization filters determine which external identities are imported.

“Check current A/AAAA and required SRV records, caching and resolver path used by affected endpoints” concerns name resolution must return the correct service host and address before a phone can establish signaling. The stated collaboration requirement instead depends on lDAP lookup scope and synchronization filters determine which external identities are imported.

“Define a coordinated recovery design for call control, databases, certificates, network dependencies and backup restoration” concerns recoverable collaboration services require identity, database, network and media dependencies, not just a bootable VM. The stated collaboration requirement instead depends on lDAP lookup scope and synchronization filters determine which external identities are imported.

“A handset learns the expected voice VLAN and registers from the correct subnet” evaluates link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding. It would not confirm the collaboration outcome requiring lDAP lookup scope and synchronization filters determine which external identities are imported.

“Affected phones resolve the intended current service target and complete registration” evaluates name resolution must return the correct service host and address before a phone can establish signaling. It would not confirm the collaboration outcome requiring lDAP lookup scope and synchronization filters determine which external identities are imported.

“End-to-end negotiated codec and measured call quality meet the approved WAN capacity and voice-quality targets” evaluates a codec is a trade-off among bitrate, quality, CPU and endpoint support rather than simply a bandwidth label. It would not confirm the collaboration outcome requiring lDAP lookup scope and synchronization filters determine which external identities are imported.

“Check current A/AAAA and required SRV records, caching and resolver path used by affected endpoints” concerns name resolution must return the correct service host and address before a phone can establish signaling. The stated collaboration requirement instead depends on a phone cannot begin normal service discovery without working network-layer configuration.

“Correct supported NTP synchronization and verify clock offset on the affected nodes and identity provider” concerns clock skew can invalidate certificate- and assertion-based authentication even when hostnames match. The stated collaboration requirement instead depends on a phone cannot begin normal service discovery without working network-layer configuration.

“Verify carrier identity policies and configure permissible calling-party number normalization per region” concerns dial-plan design must respect carrier acceptance and regional emergency-call rules as well as user dialing patterns. The stated collaboration requirement instead depends on a phone cannot begin normal service discovery without working network-layer configuration.

“Affected phones resolve the intended current service target and complete registration” evaluates name resolution must return the correct service host and address before a phone can establish signaling. It would not confirm the collaboration outcome requiring a phone cannot begin normal service discovery without working network-layer configuration.

“Clock offsets fall within policy and previously rejected time-sensitive assertions validate” evaluates clock skew can invalidate certificate- and assertion-based authentication even when hostnames match. It would not confirm the collaboration outcome requiring a phone cannot begin normal service discovery without working network-layer configuration.

“End-to-end negotiated codec and measured call quality meet the approved WAN capacity and voice-quality targets” evaluates a codec is a trade-off among bitrate, quality, CPU and endpoint support rather than simply a bandwidth label. It would not confirm the collaboration outcome requiring a phone cannot begin normal service discovery without working network-layer configuration.

“Correct supported NTP synchronization and verify clock offset on the affected nodes and identity provider” concerns clock skew can invalidate certificate- and assertion-based authentication even when hostnames match. The stated collaboration requirement instead depends on link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding.

“Validate LDAP directory connectivity, search base, filters and directory synchronization schedule” concerns lDAP lookup scope and synchronization filters determine which external identities are imported. The stated collaboration requirement instead depends on link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding.

“Renew the supported OAuth token flow and verify token audience, scopes and expiry handling” concerns oAuth access depends on valid bearer token claims and least-privilege scopes, not only network connectivity. The stated collaboration requirement instead depends on link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding.

“A controlled eligible user appears once in the synchronized Cisco UCM directory” evaluates lDAP lookup scope and synchronization filters determine which external identities are imported. It would not confirm the collaboration outcome requiring link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding.

“Clock offsets fall within policy and previously rejected time-sensitive assertions validate” evaluates clock skew can invalidate certificate- and assertion-based authentication even when hostnames match. It would not confirm the collaboration outcome requiring link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding.

“End-to-end negotiated codec and measured call quality meet the approved WAN capacity and voice-quality targets” evaluates a codec is a trade-off among bitrate, quality, CPU and endpoint support rather than simply a bandwidth label. It would not confirm the collaboration outcome requiring link-layer neighbor signaling can inform endpoint voice VLAN selection, but switch access policy still controls forwarding.