D-Link DVG-2032S, Руководство пользователя

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Hunting/Ring: It is able to set FXS group hunting using simultaneous ring or sequential ring.
Sequential Ring Time: To set the ring time of each port, when sequential ring is chosen.
SIP
All Call through OutBound Proxy
：
An outbound proxy server handles SIP call signaling as a
standard SIP proxy server would. Furthermore, it receives and transmits phone
conversation traffic (media) in between two talking gateways. This option tells the gateway
to send and receive all SIP packets to the destined outbound proxy server rather than the
remote gateway. This helps VoIP calls to pass through any NAT protected network without
additional settings or techniques. Please make sure your VoIP service provider supports
outbound proxy services before enable it.
Session Expiration: It is to avoid the billing of abnormal dropping the call because of
Internet. The default is disabled.
Session Refresh Request: to send the packet of UPDATE or re-INVITE to
Session Refresher: It is the gateway’s role in Session Timer. UAS is an originator, and UAC
is a replier.
Enable P-Assert: It is for caller id protect.
Privacy Type: Privacy requested for Third-Party Asserted.