Yealink SIP-T2XP - Updating Firmware

Yealink IP Phones Auto provisioning Guide
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account.2.sip_server.2.failback_mode =
account.2.sip_server.2.failback_timeout =
account.2.sip_server.2.register_on_enable =
######################################################
## Account3 Basic Settings (except SIP-T21P/T20P/T19P/CP860 Models) ##
######################################################
account.3.enable =
account.3.label =
account.3.display_name =
account.3.auth_name =
account.3.user_name =
account.3.password =
account.3.outbound_proxy_enable =
account.3.outbound_host =
account.3.outbound_port =
account.3.sip_listen_port =
account.3.transport =
######################################################
## Failback ##
######################################################
account.3.reregister_enable =
account.3.naptr_build =
account.3.fallback.redundancy_type =
account.3.fallback.timeout =
account.3.sip_server.1.address =
account.3.sip_server.1.port =
account.3.sip_server.1.expires =
account.3.sip_server.1.retry_counts =
account.3.sip_server.1.failback_mode =
account.3.sip_server.1.failback_timeout =
account.3.sip_server.1.register_on_enable =
account.3.sip_server.2.address =
account.3.sip_server.2.port =
account.3.sip_server.2.expires =
account.3.sip_server.2.retry_counts =
account.3.sip_server.2.failback_mode =
account.3.sip_server.2.failback_timeout =