Network Security

»Select the FW NAT Keep Alive check box and if required, modify the Interval field within the range of 5 - 86400 seconds.

System Configuration in SBC environments

In an environment that includes SAM (a Polycom SBC), to ensure that a RealPresence Mobile endpoint can send content to a conference the value of the system flag NUM_OF_INITIATE_HELLO_MESSAGE_IN_CALL_ESTABLISHMENT must be set to at least 3.

For more details on modifying the values of system flags, see Modifying System Flags.

SIP TCP Keep-Alive

SIP TCP Keep Alive behavior is defined for each IP Network Service and can be modified by adding the following System Flags and modifying their values:

SIP_TCP_KEEP_ALIVE_TYPE

SIP_TCP_KEEP_ALIVE_BEHAVIOR

Polycom®, Inc.

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Polycom 1500/1800/2000/4000 manual System Configuration in SBC environments, SIP TCP Keep-Alive