Specifications
Explorers Nur für den internen Gebrauch
A31003-H3580-M103-2-76A9, 01-2009
7-156 HiPath 3000/5000 V8 - HG 1500 V8, Administrator Documentation
hg-07.fm
Voice Gateway
● Always – the STUN client is always active.
● Automatic – the settings in the Internet telephony service provider’s profile are used (e.g.
QSC without STUN, T-Online with STUN).
STUN (Simple Traversal of UDP over NATs) is a simple network protocol with which firewalls
and NAT routers can be detected and bypassed.
WBM path: WBM > Explorers > Voice Gateway > (right-click) Internet Telephony Service Pro-
vider > Display STUN configuration
The STUN configuration mask is displayed. For descriptions of the individual fields, see Edit
STUN configuration.
7.5.4.3 Edit STUN configuration
WBM path: WBM > Explorers > Voice Gateway > (right-click) Internet Telephony Service Pro-
vider > Edit STUN configuration
The STUN configuration mask is displayed.
● STUN Mode:
You can choose from the options Off, Always or Automatic:
– Off – the STUN client is deactivated.
– Always – the STUN client is always active.
– Automatic – the settings in the Internet telephony service provider’s profile are used
(e.g. QSC without STUN, T-Online with STUN).
● STUN Listening Port:
Monitored port, used for exchanging data packets. The default port is 3478. If the STUN
server is configured on another port (e.g. Sipgate = stun.sipgate.net/Port 10000), this fact
is specified by the provider. The listening port remains at 0, the port specified at the active
Internet telephony service provider is used.
● Identified NAT Type:
The identified NAT type (full-cone NAT, restricted-cone NAT or port-restricted-cone NAT) is
displayed. If symmetric NAT is identified, VoIP is not possible.
● Time To Live (s):
Indicates how long more the NAT connection will remain active.
The STUN client always repeats its request when half of the "Time To Live" interval has
elapsed. This ensures the port is kept open. If the time expires before a request has been
started, the communication platform cannot be reached for incoming calls because the port
is closed. Outgoing calls are possible, ongoing calls are not cleared down.