WEC8500/8050 Operation Manual Version 5.2Samsung Electronics America page 264 of 5337.3 Call Admission Control (CAC) ConfigurationThe CAC function is provided to protect existing calls from the calls incoming to awireless LAN. The APC does not allow an additional call when maximum allowed numberof calls per radio is reached.7.3.1 SIP ALG ConfigurationTo make Call Admission Control (CAC) working, the Session Initiation Protocol (SIP)Application Layer Gateway (ALG) function must be enabled. The SIP ALG analyzes a SIPpacket and forwards VoIP communication status to the CAC.Configuration using CLIThe SIP ALG related commands are as follows: sipalg enable: Configures whether to enable the SIP ALG function. sipalg sip-error-resp-enable(SIP ERROR RESPONSE): Configures how to reject areceived call when maximum allowed number of calls is exceeded. Disable (default): No response for a received call connection request message.The received message is not forwarded to the called side. Enable: Rejects by transmitting 503 Service Unavailable SIP response for areceived call connection request message. The received message is not forwardedto a called side. sipalg sip-detect-long-call-enable (SIP DETECT LONG DURATION CALL):Configures whether to delete an internal resource by detecting abnormal remainingcalls. The values configured in the below two timers are used to judge an abnormalremaining call. SIP No Answer Timeout (SIP Long Call Setuptimer): Maximum allowed time ofthe status before call connection (range: 300-3600, default: 600) SIP Connect Timeout (SIP Long Call EstblshTimer): Maximum allowed time for aconnected call (range: 3600-86400, default: 7200) sipalg sip-long-call-timeout (SIP NO ANSWER TIMEOUT, SIP CONNECTTIMEOUT): Configures a time required to judge an abnormal remaining call and enterSIP No Answer Timeout and SIP Connect Timeout in order.To enable SIP ALG, execute the command as follows:1) Go to configure mode of CLI.APC# configure terminal
