User`s guide
Polycom VVX Expansion Module Administrator’s Guide Addendum  UC Software 4.1.6 
Polycom, Inc.  41 
Registration Parameters 
Parameter 
Permitted Values 
Default 
reg.x.acd-login-logout 
reg.x.acd-agent-available 
0 or 1 
0 or 1 
0 
0 
If both ACD login/logout and agent available are set to 1 for registration x, the ACD feature will be enabled for that 
registration. 
reg.x.address 
string address 
Null 
The user part (for example, 1002) or the user and the host part (for example, 1002@polycom.com) of the 
registration SIP URI or the H.323 ID/extension. 
reg.x.applyServerDigitMapLocally 
0 or 1 
0 
If 1 and reg.x.server.y.specialInterop is set to lync2010, the phone uses the dial plan from the 
Microsoft Lync Server. Any dialed number will apply the dial plan locally. If 0, the dial plan from the Microsoft Lync 
Server is not used. 
reg.x.auth.domain 
string 
Null 
The domain of the authorization server that is used to check the user names and passwords. 
reg.x.auth.optimizedInFailover 
0 or 1 
0 
The destination of the first new SIP request when failover occurs. If 0, the SIP request is sent to the server with the 
highest priority in the server list. If 1, the SIP request is sent to the server which sent the proxy authentication 
request. 
reg.x.auth.password 
string 
Null 
The password to be used for authentication challenges for this registration. If the password is non-Null, it will 
override the password entered into the Authentication submenu on the Settings menu of the phone. 
reg.x.auth.userId 
string 
Null 
User ID to be used for authentication challenges for this registration. If the User ID is non-Null, it will override the 
user parameter entered into the Authentication submenu on the Settings menu of the phone. 
reg.x.auth.useLoginCredentials 
0 or 1 
0 
If 0, login credentials are not used for authentication to the server on registration x. If 1, login credentials are used 
for authentication to the server. 
reg.x.bargeInEnabled 
0 or 1 
0 
If 0, barge-in is disabled for line x. If 1, barge-in is enabled (remote users of shared call appearances can interrupt 
or barge in to active calls). 
reg.x.callsPerLineKey
1
1 to 4, 1 to 8, 1 to 
24 
24 (for VVX phones) 
8 (for all other phones) 
Set the maximum number of concurrent calls for a single registration x. This parameter applies to all line keys using 
registration x. If registration x is a shared line, an active call counts as a call appearance on all phones sharing that 
registration. This parameter overrides call.callsPerLineKey. 
reg.x.csta 
0 or 1 
0 
If 0, the uaCSTA (User Agent Computer Supported Telecommunications Applications) feature is disabled. If 1, 
uaCSTA is enabled (overrides the global parameter voIpProt.SIP.csta. 










