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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.
4.3.3.2 SIP Phone
The
SIP Phone
selection for
Endpoint Type
refers to the protocol used.