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Customer Service & Assistance
Operation behind routers with network address translation
(NAT)
In general, no special telephone or router configuration is required when operating a Gigaset telephone with
NAT router. The configuration settings described in this section are only necessary if you encounter one of the
following problems.
•
No incoming calls are possible via VoIP. Calls to your VoIP phone numbers are not put through.
•
Outgoing calls via VoIP are not connected.
•
A connection is established with the other participant, but you cannot hear them and/or they cannot hear
you.
Changing the port numbers for SIP and RTP on your VoIP phone
¥
Connect to the telephone's web configurator using the PC web browser
Register
Open website
Set-
tings – Telephony
–
Advanced VoIP Settings
Change SIP and RTP port numbers Save settings
Example: Select port numbers that are similar to the standard settings:
¥
Check new settings: Open website
Settings
–
Telephony
–
Connections
. . . the
Status
of the VoIP set-
tings is displayed
¥
Test to see whether the original problem persists. If the problem does persist, carry out the next step.
The name of the participant is not displayed in the events list on your smartphone.
•
The contact is not available on your smartphone.
Enter contact.
•
The participant number is stored differently in the contact list, e. g. without the area code
¥
Configure settings for country code and local area code:
With handset:
Settings
–
Telephony
–
Area Codes
With web configurator:
Settings
–
Management
–
Local Settings
Calling back a missed call from your smartphone.
¥
Tap the event entry
Missed call
tap on the
Call back
icon.
Answer machine ( p. 46)
No time is specified for a message in the call list.
•
Date/time are not set.
Set the date/time (
The answer machine reports "Invalid PIN" during remote operation.
•
You have entered the wrong system PIN.
Repeat input of system PIN
•
The system PIN is still set to 0000.
Set the system PIN to something other than 0000 (
p. 94).
The answer machine is not recording any messages/has switched to answer only mode.
•
The memory is full.
Delete old messages
Listen to new messages and then delete
The SIP and RTP port numbers may not be used by any other application or by any other host in the
LAN and should be completely different to the SIP and port numbers that are usually used (and pre-
set in the phone).
SIP port
49060
instead of
5060
RTP port
49004 to 49010
instead of
5004 to 5010