T-Comfort Comfort Pro S, Mounting And Commissioning Manual

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More Questions? Frequently Asked Questions
Question: A SIP connection only
passes unidirectional voice. What
is the reason?
You did not use the Comfort Pro S as internet router or the STUN
server of the SIP provider is unavailable. You need to activate the SIP
support at your internet router, such as “SIP-ALG” or “Full Cone
NAT” functions. You can also use the Comfort Pro S for internet
access. Correct the STUN setting in the Telephony : Trunks : SIP
Provider menu.
Question: Is it possible to use
Q.SIG-IP connections via an
Internet access with dynamic IP
address?
Q.SIG-IP connections require a fixed IP assignment for technical
and security reasons. Therefore you need an Internet access with a
fixed IP address. It is possible to tunnel a Q.SIG-IP connection
through a VPN connection. A VPN connection offers the possibility
to determine the peer’s IP address with a DynDNS service during
connection setup. VPN and DynDNS can be realized with external
servers or routers also.
More Questions?
If you suppose a defect of your telephone line, please contact the
service department of your telephony provider. For Deutsche
Telekom, the “Technische Service” is available either by freecall
0800 330 2000 or on the Internet:
http://www.t-home.de/kundendienst/.