The SoundStructure VoIP Interface
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This same information can be set for a second server which will be used if the
primary server is not accessible. In addition, you can permanently forward
calls to a different number with the Call Diversion options. See the Polycom
UC Software Administrators Guide 4.0.1 for additional information.
Name Possible Values Description
Address Any string up to 256
characters
Enter an IP address or the host name of an SIP server
that accepts registrations. This address can be set at
Simple Setup > SIP Server, or at Settings > SIP >
Server 1. Changes applied to settings in one place are
applied in both places.
Port From 0 to 65535 Enter the port of a SIP server that accepts registrations.
The default is '0'.
Transport DNSnaptr, UDPOnly,
TCPpreferred,
TCPOnly, TLS
Choose a transport method that the phone uses to
communicate with the SIP server. There are four
transport methods:
DNSnaptr: The phone performs NAPTR and SRV
look-ups that discover the transport, ports, and servers.
DNSnaptr is the default transport method.
UDPOnly: Only UDP is used.
TCPpreferred: TCP is preferred and UDP is used if TCP
fails.
TCPOnly: Only TCP is used.
TLS: If TLS is used, leave the port field empty, and the
phone will use 5061 by default or you can set the port to
5061. If TLS fails, transport fails.
Expires (s) 10 to 2147483647 The phone's requested registration period. The value
must be at least 10 seconds. The default is 3600
seconds.
Register Yes, No If set to No, calls can be routed to an outbound proxy
without registration.
Retry Timeout (ms) 0 to 65535 This setting specifies how often retries will be sent. If
you don't specify a value, or the value is 0, the standard
RFC 3261 signaling retry behavior (the default
behavior) is used. The minimum value is 100
milliseconds.
Retry Maximum
Count
0 to 20 The number of retries to be attempted before moving on
to the next available server. If you don't specify a value,
or the value is 0, a value of 3 is used. The default is 3
retries.
Line Seize Timeout
(s)
From 0 to 65536 The requested line-seize subscription period (from 0 to
65535 seconds). This is the amount of time to play the
dial tone while the phone is off-hook before going back
to the idle state. The default is 30 seconds.
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