Http://www.dbltek.com
VP-102 / VP-202 User Manual
24
7.
Signaling QoS
– This parameter sets the QoS mode for VoIP Signaling for better response time and more
reliable VoIP Call signaling. Both IP TOS and Diffserv modes are supported. Please check with your
network administrator or ISP for the correct setting.
8.
Signaling NAT Traversal
– NAT Traversal is an algorithm designed to solve a common problem in
TCP/IP networking in establishing connections between hosts in private TCP/IP networks that use NAT
devices. This parameter only sets the NAT Traversal mode for VoIP signaling. The 3 methods supported
are
NAT Citron
,
Port-forward/DMZ
, and
Relay Proxy
.
Both
NAT Citron
and
Port-forward/DMZ
are well known NAT protocols are are widely used; however,
they require the support of local network.
Relay Proxy mode is a proprietary NAT protocol and it is designed for NAT Traversal with the capability
of avoiding VoIP blockings. All VoIP signaling and/or media packets are encapsulated (encrypted as well
if enabled) and transmitted via another port/channel to our proprietary Relay Server. Please contact your
service provider to determine if this mode is supported.
2.4.3.2 SIP Phone
The
SIP Phone
selection for
Endpoint Type
refers to the protocol used.
Model VP-102 supports only one line registration.
Model VP-202 supports up to two line registrations to the same or different SIP Servers.
The Call Settings pages for both models are shown below. Some of the parameters in VP-202 are discussed in
the Phone Setting Page.
VP-102 VP-202