Cisco SPA9000 Voice System Administration Guide
Page 225
...223 NOTE If you have a compatible firmware that understands that the phones have a SPA962 with its IP address in this option is to support busy lamp field (B LF). The purpose of its actual IP address. for SPA-841, use 4.1.12 or later; If this parameter is yes..., the SPA9000 uses the hostname LVS_PROXY instead of this parameter is a special hostname. For SPA-941/942/921/922/901, use 3.1.6(KS) or later. On reboot, the phones resolve the LVS_PROXY by...
...223 NOTE If you have a compatible firmware that understands that the phones have a SPA962 with its IP address in this option is to support busy lamp field (B LF). The purpose of its actual IP address. for SPA-841, use 4.1.12 or later; If this parameter is yes..., the SPA9000 uses the hostname LVS_PROXY instead of this parameter is a special hostname. For SPA-941/942/921/922/901, use 3.1.6(KS) or later. On reboot, the phones resolve the LVS_PROXY by...