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Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones426symmetric keys during auto provisioning. If the parameter “static.auto_provision.aes_key_16.mac” is leftblank, the value of the parameter “static.auto_provision.aes_key_16.com” will be used.If the downloaded contact files is encrypted, the IP phone will try to decrypt -contact.xml fileusing the plaintext AES key. After decryption, the IP phone resolves contact files and updates contactinformation onto the IP phone system.Encryption and Decryption ConfigurationThe following table lists the parameters you can use to configure the encryption and decryption.Parameter static.auto_provision.update_file_mode <y0000000000xx>.cfgDescription It enables or disables the IP phone only to download the encrypted files.PermittedValues0-Disabled, the IP phone will download the configuration files (for example, sip.cfg,account.cfg, -local.cfg) and -contact.xml file from the server duringauto provisioning no matter whether the files are encrypted or not. And then resolvethese files and update settings onto the IP phone system.1-Enabled, the IP phone will only download the encrypted configuration files (forexample, sip.cfg, account.cfg, -local.cfg) or -contact.xml file from theserver during auto provisioning, and then resolve these files and update settings ontothe IP phone system.Default 0Parameter static.auto_provision.aes_key_in_file <y0000000000xx>.cfgDescription It enables or disables the IP phone to decrypt configuration files using the encryptedAES keys.PermittedValues0-Disabled, the IP phone will decrypt the encrypted configuration files using plaintextAES keys configured on the IP phone.1-Enabled, the IP phone will download .enc files (for example,.enc, .enc) during auto provisioning, and thendecrypts these files into the plaintext keys (for example, key2, key3) respectively usingthe phone built-in key (for example, key1). The IP phone then decrypts the encryptedconfiguration files using corresponding key (for example, key2, key3).Default 0Parameter static.auto_provision.aes_key_16.com <y0000000000xx>.cfgDescriptionIt configures the plaintext AES key for encrypting/decrypting the CommonCFG/Custom CFG file.The valid characters contain: 0 ~ 9, A ~ Z, a ~ z and the following special charactersare also supported: # $ % * + , - . : = ? @ [ ] ^ _ { } ~.Example:
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