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Description of new and updated functions
Information on operating Gigaset VoIP telephones with Network Address Translation (NAT) routers
Information on operating Gigaset VoIP telephones with
Network Address Translation (NAT) routers
This section amends the section "Questions and answers" in the chapter "Customer care" in the user
guide for your phone.
In general no special telephone or router configuration is required when operating a
Gigaset VoIP phone with a NAT router. The configuration settings described in this section
are only necessary if you encounter one of the following problems.
Typical problems caused by NAT
u
No incoming calls are possible via VoIP. Calls to your VoIP phone number are not put
through.
u
Outgoing calls via VoIP are not connected.
u
A connection is established with the other party, but you cannot hear them and/or they
cannot hear you.
Possible solution
1. Change the port numbers of the communication ports (SIP and RTP ports) on your tele-
£
phone (
"1. Changing the port numbers for SIP and RTP on your VoIP
2. In some cases, you must also define port forwarding for the telephone's communication
ports on the router (
1. Changing the port numbers for SIP and RTP on your VoIP phone
On your VoIP telephone, define different (local) port numbers for the SIP and RTP ports
(between 1024 and 49152).
u
These numbers must not be used by any other application or host in the LAN and
u
be considerably higher or lower than the SIP and RTP port numbers that you usually use
(and are preset on the phone).
This procedure is particularly useful if additional VoIP phones are connected to the router.
To change the SIP and RTP port numbers on your VoIP phone, proceed as follows:
¤
Connect your PC's browser to the Web configurator of the telephone and log in
£
(
user guide for your phone).
¤
Open the Web page
for the SIP and RTP ports (
To help you remember the new port numbers (e.g. for router configuration), you can
choose numbers that are very similar to the standard settings, e.g.
49060
SIP port
49004 to 49010
RTP port
¤
Save the changes on your telephone.
¤
Wait for the active VoIP connections to be re-registered. To do so, switch to the Web
¢
page
Settings
¤
Check to see whether the problem persists. If it does, perform step 2.
28
£
"2. Setting port forwarding on the
¢
Settings
Telephony
£
Page
23).
instead of
instead of
¢
Telephony
Connections
¢
Advanced Settings
5060
5004 to 5010
to see the
of your VoIP connections.
Status
phone").
router").
and change the settings
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