Linksys SPA9000 Administrator's Manual page 170

SIP Tab
Phone Config XML
Use LVS_PROXY
Linksys SPA9000 Administrator Guide
6-22
XML configuration to be served to the phones when they request the init_$MA.xml file
from the SPA9000 during their first-time initialization (either a brand-new phone or after
a factory reset). If this parameter is empty, the SPA9000 serves the normal auto-generated
startup XML configuration file to the phone instead.
The purpose of this parameter is to facilitate ITSP provisioning of new phones remotely.
ITSP can simply include a default phone profile rule parameter in this parameter so that
the phone can obtain it from the SPA9000 on initial power-up. For example:
<Profile_Rule>https://www.itsp.com/init/spa$MA.cfg</Profile_Rule>
Do not include <flat-profile>...</flat-profile>. The SPA9000 automatically adds them
when serving the configuration file to the phones.
The default is blank.
If this option is yes, the SPA9000 uses the hostname LVS_PROXY instead of its IP
address in the Profile_Rule parameter that is served to the phones when they request
init_$MA.xml during first-time initialization (when <Phone Config XML> is not
specified). On reboot, the phones resolve the LVS_PROXY by querying the LAN via
multicast. The SPA9000 replies to the query with its actual IP address. This allows the
SPA9000 to use a dynamically-assigned IP address that is not fixed.
Make sure that the phones have a compatible firmware that understands that
LVS_PROXY is a special hostname. For SPA-941/942/921/922/901, use 4.1.12 or later;
for SPA-841, use 3.1.6(KS) or later.
Chapter 6 SPA9000 Field Reference
Document Version 3.01