Version 6.4 203 March 2012
SIP User's Manual 14. Control Network
Parameter Description
If set to 'Using Options', the SIP OPTIONS message is sent every
user-defined interval (configured by the parameter
ProxyKeepAliveTime). If set to 'Using Register', the SIP REGISTER
message is sent every user-defined interval (configured by the
RegistrationTime parameter). Any response from the Proxy, either
success (200 OK) or failure (4xx response) is considered as if the
Proxy is communicating correctly.
Notes:
For Survivability mode for USER-type IP Groups, this parameter
must be enabled (1 or 2).
This parameter must be set to 'Using Options' when Proxy
redundancy is used.
When this parameter is set to 'Using Register', the homing
redundancy mode is disabled.
When the active proxy doesn't respond to INVITE messages sent
by the device, the proxy is tagged as 'offline'. The behavior is
similar to a Keep-Alive (OPTIONS or REGISTER) failure.
If this parameter is enabled and the proxy uses the TCP/TLS
transport type, you can enable CRLF Keep-Alive mechanism, using
the UsePingPongKeepAlive parameter.
Web: Proxy Keep Alive Time
EMS: Keep Alive Time
[ProxySet_ProxyKeepAlive
Time]
Defines the Proxy keep-alive time interval (in seconds) between Keep-
Alive messages. This parameter is configured per Proxy Set.
The valid range is 5 to 2,000,000. The default value is 60.
Note: This parameter is applicable only if the parameter
EnableProxyKeepAlive is set to 1 (OPTIONS). When the parameter
EnableProxyKeepAlive is set to 2 (REGISTER), the time interval
between Keep-Alive messages is determined by the parameter
RegistrationTime.
Web: Proxy Load Balancing
Method
EMS: Load Balancing
Method
[ProxySet_ProxyLoadBala
ncingMethod]
Enables the Proxy Load Balancing mechanism per Proxy Set ID.
[0] Disable = Load Balancing is disabled (default)
[1] Round Robin
[2] Random Weights
When the Round Robin
algorithm is used, a list of all possible Proxy IP
addresses is compiled. This list includes all IP addresses per Proxy
Set, after necessary DNS resolutions (including NAPTR and SRV, if
configured). After this list is compiled, the Proxy Keep-Alive
mechanism (according to parameters EnableProxyKeepAlive and
ProxyKeepAliveTime) tags each entry as 'offline' or 'online'. Load
balancing is only performed on Proxy servers that are tagged as
'online'.
All outgoing messages are equally distributed across the list of IP
addresses. REGISTER messages are also distributed unless a
RegistrarIP is configured.
The IP addresses list is refreshed according to
ProxyIPListRefreshTime. If a change in the order of the entries in the
list occurs, all load statistics are erased and balancing starts over
again.
When the Random Weights algorithm is used, the outgoing requests
are not distributed equally among the Proxies. The weights are
received from the DNS server by using SRV records. The device
sends the requests in such a fashion that each Proxy receives a
percentage of the requests according to its' assigned weight. A single
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