Polycom SoundStructure C16 Design Manual page 343

Call Server Setting
Name Possible Values
Address Any string up to 256
characters
Port From 0 to 65535
Transport DNSnaptr, UDPOnly,
TCPpreferred,
TCPOnly, TLS
Expires (s) 10 to 2147483647
Register Yes, No
Retry Timeout (ms) 0 to 65535
Retry Maximum 0 to 20
Count
Line Seize Timeout From 0 to 65536
(s)
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.
Polycom, Inc.
Description
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.
Enter the port of a SIP server that accepts registrations. The
default is '0'.
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.
The phone's requested registration period. The value must be at
least 10 seconds. The default is 3600 seconds.
If set to No, calls can be routed to an outbound proxy without
registration.
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.
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.
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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