Welltech WG26xx Series V.1.08a - Manual (Page 30)

26xx Technical Manual EN-V108
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does not receive a response within 10
seconds, it will cancel the call.
SIP/RTP Encrypt Enable Welltech proprietary encryption
for SIP signaling and RTP or not. It is
required a Welltech SIP proxy server
(WS6500 or SIPPBX 6200) to work
with this feature. When enable it, you
can hide your VOIP traffic from ISP’s
monitor.
SIP session keep mode Select the following NAT SIP session
keeping method.
Disable
Empty packet (0x0D and 0x0A will
be send)
SIP Options (send SIP option)
SIP Register (send SIP register
message)
SIP Ping (send Nortel SIPping)
SIP session keep interval (sec) The interval to send the SIP session
keep message out. The method was
defined in “SIP session keep mode”.
NAT traversal setting Support through NAT methods
Disable
IP Sharing: Use DMZ to map the
private Wellgate IP address to a
public one. You need to do the DMZ
on IP sharing box.
STUN: Use STUN to do NAT
transversal. This method can only
work for NAT type 1 and 2.
NAT device IP address The DMZ IP address used for IP
sharing NAT transversal mode.
STUN server The STUN server IP address
STUN port The STUN port (default is 3478)
Generate tone for 100 trying Whether to generate tone when
receive the SIP message 100 trying or
not. You can specify to generate the
defined ring back tone or a custom