Fixed network telephone (IP) / Hide number

Connect fixed-line telephone

With fixed network telephony (IP), you connect your fixed-network telephone to the Internet-Box instead of a phone socket. 

How it works: 

HD-Phones from Swisscom

When you use your wireless HD-Phone for the first time, the telephone display shows that you should press the + button (= pairing button/connection button) on the Internet-Box. When you do this, the HD-Phone connects automatically. 

Alternatively, you can also set up the connection via the menu. To do this, follow the device instructions. 

Analogue fixed-network telephone

You can also connect analogue fixed-line and cordless telephones with their own DECT base station to the Internet-Box. To do this, use the port labelled “Phone” on your Internet-Box.

 What if the connection isn’t established? Change the dialling method to “Frequency dialling” in the settings.

You can also find further information in the device instructions. 

You can continue using older analogue fixed-network telephones that are not IP-enabled. However, some functions will no longer be possible.

SIP telephone from other providers

You can also use your Swisscom fixed-network number with a SIP-enabled telephone from another provider. To do this, use your SIP credentials or set up local IP telephony. 

SIP credentials

Local IP telephony

Hide number

If you hide your landline number, you can call anonymously. The person you call will not see your number. 

How it works: 

Enter the following key combination on your fixed-network phone: *31 followed by the telephone number.

Hiding a mobile number

  • Hide for all calls: *31#
  • Deactivate hiding: #31#

Order a further telephone number

Order an additional fixed network number in My Swisscom(opens in new tab). Go to Manage products and services  Telephony Change options.

Private individuals can use two numbers, business customers up to five. Need more phone numbers? Contact us.

Then set up the phone number on the device:

Internet-Box

Make sure you are connected to your home WLAN. 

  1. Enter the address http://internetbox.swisscom.ch or 192.168.1.1 in your Internet browser and log in.
  2. Go to Telephony  Settings.      
  3. For an “Outgoing call”, specify which phone number is to be displayed when you call a person. 
  4. For an “Incoming call”, specify which phone number rings on which device. 
  5. Click on “Save”.

Centro Business

  1. Go to My Swisscom(opens in new tab) Devices  Manage devices.
  2. Set up which telephone number should ring on which device. 

If your handset is logged into Centro Business 2.0, or Centro Business 3.0 via IP BASE COMFORT, you can do this on the handset itself.

IP telephone from Swisscom

  1. In My Swisscom(opens in new tab), go to Device Overview.
  2. Set up which telephone number should ring on which device.

IP telephone from other providers

Use your SIP credentials or set up local IP telephony. 

SIP credentials

Local IP telephony

Make internal calls

If you have two or more fixed-network telephones (HD-Phones) connected to the Internet-Box, you can make calls from one to the other free of charge. Simply allocate short numbers to the devices in the web portal (http://internetbox.swisscom.ch or 192.168.1.1). You can then dial the short numbers to call another fixed network device internally.

Internal forwarding is possible only from one HD-Phone to another HD-Phone or to a telephone that is connected to phone port 1 or 2 on the Internet-Box.

The same also works with Centro Business. However, an additional phone number is needed in inOne SME for forwarding to an IP telephone (e.g. Yealink T46S).

Forwarding calls internally

Here’s how to forward an external call to another device internally:  

  1. During the call, go to Menu Options  Forward. Depending on the model, you can also use “New call”, “Internal call” or the INT button (if available).
  2. Select the other device or dial the internal short number directly.
  3. Wait until the other person picks up the call.
  4. Go back to Menu Options  Forward. Depending on the model, you can also use “Connect” or “Forward call”.
  5. The call is then transferred. You can then hang up.

FAQs

I can’t make or receive calls. What can I do?

Check the following points: 

  • Handset battery is charged 
  • Router is switched on    
  • Connected to the Internet (LED on Internet-Box is white)
  • No power failure

Still having problems? Contact us.

How can I stay in contact when there is a fault?

In My Swisscom,(opens in new tab) activate the add-on service “Redirection during a fault”. This means that you can continue to receive calls even in the event of a power cut or connection failure.

Why does my landline phone display some calls anonymously despite automatic name display?

If someone has hidden their number or if it is not in the telephone book, their name is not displayed.

Where can I find instructions for fixed-network telephones?

No suitable answer found?

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