Siemens GIGASET C475 IP User Manual

Page 166

165

Appendix

Questions and answers

Gigaset C470-475 IP / EN for IM-Ost / A31008-xxxx-xxxx-x-xxxx / appendix.fm / 18.12.07

ion 2.

08.0

1.20

You cannot connect to the router and the phone is assigned a static IP address.

Check on the router whether the IP address is already being used by another device in the LAN or

belongs to the block of IP addresses that is reserved on the router for dynamic address assignment.

If necessary, change the phone's IP address (page 121).

You have made a call via VoIP but cannot hear the other caller.
Your phone is connected to a router with NAT/firewall.

Your STUN server (page 138) or outbound proxy (page 139) settings are incomplete or incorrect.

Check the settings.

No outbound proxy is entered or the outbound proxy mode

Never

is activated (page 139) and your

phone is connected to a router with symmetric NAT or a blocking firewall.

Port forwarding is activated on your router, but no permanent IP address has been assigned to

your phone.

You cannot make calls via VoIP.

Server not accessible!

is displayed.

First wait a few minutes. This is often a short-term event that corrects itself after a short time.

If the message is still displayed, proceed as follows:

Check whether your phone's Ethernet cable is correctly connected to the router.

Check your router's cable connection to the Internet.

Check whether the phone is connected to the LAN. Send a ping command, e.g. from your PC, to

the phone (ping

s ). It may be that no IP address could be assigned

to the phone or a permanently set IP address is already assigned to another LAN subscriber. Check

the settings on the router, you may have to activate the DHCP server.

You cannot make calls via VoIP. Either

Provider registration failed!

Registration failed

is shown.

First wait a few minutes. This is often a short-term event that corrects itself after a short time.

The message may still be displayed for the following reasons:
1. The personal VoIP access data (

Username

Authent. Name

and

Authent. Password

) you have entered

may be incomplete or wrong.

Check your information. In particular, check your use of upper and lower case.

2. The general settings for your VoIP provider are incomplete or incorrect (incorrect server address).

Start the Web configurator and check the settings.

You cannot make calls via VoIP. The display shows

IP configuration error: xxx

VoIP config.error: xxx

(xxx = VoIP status code).
You are trying to make a call via a VoIP connection that is not properly configured.

Start the Web configurator and check the settings. Possible status codes and their meanings are

listed on page 167.

The phone does not dial an entered number. The display shows

Not possible!

The number may be blocked (dial rule).

Open the

Dialling Plans

Web page of the Web configurator and delete or deactivate the block.

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 LAN connections for the PC and phone.

Check that your phone can be reached. Send a ping command, e.g. from your PC, to the phone

(ping

s ).

You have tried to reach the phone via a secure http (https://...). Try again with http://....

This manual is related to the following products:

Gigaset C470 IP