User manual

26xx Technical Manual EN-V108

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