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The Rtpchecksums enable the application checksum over UDP encrypted voice transmission. This is an error detection commodity, which adds 16 bits per packets payload.
Strictrtp
Strictrtp Enables the strict RTP protection. This will drop RTP if enabled, RTP packets that do not come from the source of the RTP stream . This option is disabled by default.
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In order to enable call roaming through different kind of networks (mobiles 'X'G family and Wi-Fi) you need to DISABLE Strictrtp. |
Strictrtp option is about call roaming. If it's enabled then each call would be terminated on network change event.will be dropped.
Rtp timeout
Rtp timeout sets up the amount of seconds one server can wait without dealing RTP packages on one call's leg. This value is connected to client's setup and it gives you the fault tolerance time of one call.
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If any mobile user has been configured with the keep-alive option on, then we strongly suggest you to set the keep-alive Frequency to 180 seconds (i.e. 3 minutes) at least in order to save battery life.
2.4.6 TCP keep alive
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The procedures involving keepalive use three user-driven variables:
tcp_keepalive_time
the interval between the last data packet sent (simple ACKs are not considered data) and the first keepalive probe; after the connection is marked to need keepalive, this counter is not used any further
tcp_keepalive_intvlinterval
the interval between subsequential keepalive probes, regardless of what the connection has exchanged in the meantime
tcp_keepalive_probes
the number of unacknowledged probes to send before considering the connection dead and notifying the application layerRemember that keepalive support, even if configured in the kernel, is not the default behavior in Linux. Programs must request keepalive control for their sockets using the setsockopt interface. There are relatively few programs implementing keepalive, but you can easily add keepalive support for most of them following the instructions explained later in this document.
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