Information On Operating Gigaset Voip Telephones With Routers With; Network Address Translation (Nat) - Gigaset N720 DECT IP Installation, Configuration & Operation

Information on operating Gigaset VoIP telephones with routers
with Network Address Translation (NAT)
Generally speaking, no special telephone or router configuration is required when
operating a Gigaset VoIP phone with 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
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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 phone's communication
ports on the router (
1. Changing the port numbers for SIP and RTP on your VoIP phone
On your VoIP phone system, define different (local) port numbers for the SIP and RTP
ports (between 1024 and 49152).
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These numbers must not be used by any other application or host in the LAN and
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Must 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 system, proceed
as follows:
¤
Connect your PC's browser to the Web configurator of the DECT Manager and log in.
¤
Open the Web page Settings
the settings for the SIP and RTP ports (
To help you remember the new port numbers (e.g., for router configuration), you can
choose port numbers that are very similar to the standard settings, e.g.:
SIP port
RTP port
¤
Save the changes on your phone.
¤
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.
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"2. Setting port forwarding on the
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Telephony
49060 instead of
49004 instead of
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VoIP providers to see the Status of your VoIP connections.
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Advanced VoIP settings and change
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page 87).
5060
5004
Customer care
phone").
router").
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