Gigaset C530 ip User Manual page 136

You cannot establish a connection to the phone with your PC's web browser.
¥
When establishing a connection, check the phone's local IP address that has been entered. You can check
the IP address on your handset (
¥
Check the connections between the PC and base. Transmit a ping command to your base, e.g. from your
¥ PC (ping <base's local IP address>).
You have tried to reach the phone via a secure http (https://...). Try again with http://...
Information on operating Gigaset VoIP telephones with routers
with Network Address Translation (NAT)
In general 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 participant, but you cannot hear them and/or
they cannot hear you.
Possible solution
Change the port numbers of the communication ports (SIP and RTP ports) on your phone
1
£
( "1. Changing the port numbers for SIP and RTP on your VoIP phone").
In some cases, you must also define port forwarding for the phone's communication ports
2
£
on the router (
1. Changing the port numbers for SIP and RTP on your VoIP phone
On your VoIP phone, 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
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.
¢
page 54).
"2. Setting port forwarding on the router").
Customer Service & Assistance
135