ATL Telecom IP-3072 PoE Smart Office IP Telephone - Manual (Page 36)

Page 36
MOCET IP3072 Smart Office IP Desk Phone Administrators' Guide
Assigning Call Progress Tones
IP3072 phone plays call signals and alerts, called call progress tones, such as busy
signals, ringback sounds, and call waiting tones. It can support 12 different call progress
tones for the following countries.
 United States
 China
 United
Kingdom
 Canada
 Japan
 France
 Korea
 Germany
 Singapore
 Hong
Kong
 Taiwan
 Australia
The default call progress tones on IP3072 phone match standard United States tones. You
can assign your IP3072 phone to match the standard tones in your region.
Configuring Network Address Translation
IP3072 phone can support STUN (Simple Traversal of UDP through Network Address
Translators - RFC 3489) and UPnP (Universal Plug and Play) types of NAT.
The STUN type of NAT allows IP3072 phone operating behind a NAT to discover the
presence of the network address translator and to obtain the mapped NAT address and
port number that the NAT has allocated for the IP3072 phone's UDP connections to
remote hosts. IP3072 phone requires assistance from a third-party network server (STUN
server) located on the opposing (public) side of the NAT, usually the public Internet.
However, please note that STUN does not work with symmetric NAT which is often found
in the networks of large companies.
The UPnP type of NAT allows IP3072 phone to automatically discover the router,
determine its public IP address and auto-configure port forwarding when using with UPnP
enabled routers. This makes the IP3072 phone accessible for incoming calls from the
public Internet.