/mcpDescription Field Provide the authentication (authorization) string generated under the CAPF profile. To install or upgrade a locally stored certificate, the User must enter the authentication (authorization) string. This string supports one-time use only; after you use the string for an instance, you cannot use it again. This is required for Client authentication with CAPF Server and Private Key storage on client machine. Authorization String Provide Instance ID for CAPF end User profile: Each secure connection to CTIManager must have its own certificate for authentication. With the restriction of a distinct certificate per connection, CAPF Server must verify that the user with appropriate AuthCode and InstanceID is requesting the certificate. CAPF server uses the AuthCode and InstanceID to verify the User's identity. Once CAPF server provides a certificate it clears the AuthCode to ensure that only one instance of an application requests a certificate based on a single AuthCode. Cisco Unified CM Administration UI allows User configuration to provide multiple InstanceID and AuthCode. Instance Identifier Provide the CAPF server IP address from which to fetch the client certificate. IP Address Provide the CAPF Server Port to connect for Certificate download (Default :3804). Port Indicates the number of retries TSP will perform to connect to the CAPF Server for certificate download in case of an error. This value is used when a communication failure occurs while the certificate installation is taking place. Default value is 0 and range is 0 to 3. Number of Retries for Certificate Fetch Indicates the number of seconds the TSP should wait between re-attempting to retrieve the certificate. Default value is 0 and range is 0 to 15. Retry Interval for Certificate Fetch Indicates the TFTP server IP address from which to fetch the CTL file. CTL file is required to verify the server certificate, sent while mutually authenticating the TLS connection. Note TAPI connects to default UDP port (69) while downloading the CTL file. TFTP IP Address Cisco Unified TAPI Developers Guide for Cisco Unified Communications Manager, Release 15 and SUs 135 Cisco Unified TAPI Installation Security