User`s guide
Polycom VVX Expansion Module Administrator’s Guide Addendum  UC Software 4.1.6 
Polycom, Inc.  44 
Parameter 
Permitted Values 
Default 
reg.x.outboundProxy.failOver.reRegisterOn 
0 or 1 
0 
This parameters overrides reg.x.server.y.failOver.failBack.RegisterOn. When set to 1, the phone will 
attempt to register with (or via, for the outbound proxy scenario) the secondary server. If the registration succeeds 
(a 200 OK response with valid expires), signaling will proceed with the secondary server. When set to 0, the phone 
won’t attempt to register with the secondary server, since the phone will assume that the primary and secondary 
servers share registration information. 
reg.x.outboundProxy.port 
1 to 65535 
0 
The port of the SIP server to which the phone sends all requests. 
reg.x.outboundProxy.transport 
DNSnaptr, 
TCPpreferred, 
UDPOnly, TLS, 
TCPOnly 
DNSnaptr 
The transport method the phone uses to communicate with the SIP server. 
- Null or DNSnaptr If reg.x.outboundProxy.address is a hostname and reg.x.outboundProxy.port is 
0 or Null, do NAPTR and then SRV lookups to try to discover the transport, ports and servers, as per RFC 3263. If 
reg.x.outboundProxy.address is an IP address, or a port is given, then UDP is used. 
- TCPpreferred  TCP is the preferred transport, UDP is used if TCP fails. 
- UDPOnly  Only UDP will be used. 
- TLS  If TLS fails, transport fails. Leave port field empty (will default to 5061) or set to 5061. 
- TCPOnly  Only TCP will be used. 
reg.x.proxyRequire 
string 
Null 
The string that needs to be entered in the Proxy-Require header. If Null, no Proxy-Require will be sent. 
reg.x.ringType 
default, ringer1 
to ringer24 
ringer2 
The ringer to be used for calls received by this registration. The default is the first non-silent ringer. 
reg.x.ringType.privateLine 
default, ringer1 
to ringer24 
default 
The ringer to be used for calls received by a private line connected to Microsoft Lync Server 2010. 
reg.x.serverAutoDiscovery 
0 or 1 
1 
Determines whether or not to discover the server address automatically. This parameter is used with Microsoft Lync 
Server 2010. 
reg.x.serverFeatureControl.cf
1
0 or 1 
0 
If 0, server-based call forwarding is not enabled; this is the old behavior. If 1, server-based call forwarding is 
enabled. This parameter overrides voIpProt.SIP.serverFeatureControl.cf. 
reg.x.serverFeatureControl.dnd
1
0 or 1 
0 
If 0, server-based do-not-disturb (DND) is not enabled. If 1, server-based DND is enabled and the call server has 
control of DND. This parameter overrides voIpProt.SIP.serverFeatureControl.dnd. 










