Brand: SIEMENS
Category: Mobile Phone
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for C470 IP / C475 IP
Uploaded: Nov. 21, 2025, 6:27 p.m.
Manual Publish Date: 2008-01-01
Warranty Information
Siemens Home and Office Communication Devices GmbH & Co. KG provides a warranty for this product.
The Gigaset C470 IP/C475 IP phone offers versatile calling options, allowing calls via the fixed line network or the Internet (VoIP). It supports registration of up to six handsets, simultaneous calls, and assigning unique VoIP numbers to each handset. The phone can also manage incoming e-mails, offer instant messaging, and has an integrated answer machine on the C475 IP model. It features a protected operating system for enhanced security and allows for firmware updates. Users can choose between fixed line and VoIP connections for calls and configure settings via the phone or a web interface.
Troubleshooting and error codes
| Problem | Cause | Solution |
|---|---|---|
| The handset is not working. | The battery is flat. | Charge the battery (see page 13). |
| The handset is not working. | The handset is not registered with the base station. | Register the handset (see page 98). |
| No connection to the Internet. | The router is not connected to the Internet. | Connect the router to the Internet. |
| No connection to the Internet. | The LAN cable is not correctly connected. | Check the LAN cable connections (see page 17). |
| VoIP calls cannot be made. | Incorrect VoIP settings. | Check the VoIP settings (see page 18). |
| VoIP calls cannot be made. | No connection to the Internet. | Check the Internet connection. |