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6.3.4
ALG
SIP ALG is Application layer gateway. If the user has an IP phone(SIP) or VoIP
gateway(SIP) behind the ADSL router, the SIP ALG can help VoIP packet
passthrough the router (NAT enabled).
Note: SIP (Session Initiation Protocol, RFC3261) is the protocol of choice for most
VoIP (Voice over IP) phones to initiate communication. This ALG is only valid for SIP
protocol running on UDP port 5060.
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