Polycom CX5500 Unified Conference Station Administrator’s Guide 1.1.0
Polycom, Inc. 335
voIpProt.server.x.transport
DNSnaptr,
TCPpreferred,
UDPOnly, TLS,
TCPOnly
The transport method the phone uses to communicate with the SIP server.
Null or DNSnaptr – if voIpProt.server.x.address is a hostname and voIpProt.server.x.port is 0 or
Null, do NAPTR then SRV look-ups to try to discover the transport, ports and servers, as per RFC 3263. If
voIpProt.server.x.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.
voIpProt.server.x.protocol.SIP
If 1, server is a SIP proxy/registrar. Note: if set to 0, and the server is confirmed to be a SIP server, then the value
is assumed to be 1.
voIpProt.server.x.expires
positive integer,
minimum 10
The phone’s requested registration period in seconds. Note: The period negotiated with the server may be
different. The phone will attempt to re-register at the beginning of the overlap period. For example, if
expires=”300” and overlap=”5”, the phone will re-register after 295 seconds (300–5).
voIpProt.server.x.expires.overlap
The number of seconds before the expiration time returned by server x at which the phone should try to re-
register. The phone will try to re-register at half the expiration time returned by the server if the server value is less
than the configured overlap value.
voIpProt.server.x.expires.lineSeize
positive integer,
minimum 0 was 10
Requested line-seize subscription period.
voIpProt.server.x.failOver.failBack.mode
newRequests,
DNSTTL,
registration,
duration
The mode for failover failback:
newRequests – all new requests are forwarded first to the primary server regardless of the last used server.
DNSTTL – the phone tries the primary server again after a timeout equal to the DNS TTL configured for the server
that the phone is registered to.
registration – the phone tries the primary server again when the registration renewal signaling begins.
duration – the phone tries the primary server again after the time specified by
voIpProt.server.x.failOver.failBack.timeout.
voIpProt.server.x.failOver.failBack.timeout
If voIpProt.server.x.failOver.failBack.mode is set to duration, this is the time in seconds after failing
over to the current working server before the primary server is again selected as the first server to forward new
requests to. Values between 1 and 59 will result in a timeout of 60 and 0 means do not fail-back until a fail-over
event occurs with the current server.
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