1&1

For the SIP provider 1&1, the prefix 49 must be replaced by 0 for the incoming number. By doing this, this ensures the numbers and names from the system telephone book are correctly displayed for any incoming calls.

Go to VoIP->Settings->SIP Provider-> <1und1> -> .

VoIP->Settings->SIP Provider-> <1und1> ->

VoIP->Settings->SIP Provider-> <1und1> -> ->Advanced Settings

Proceed as follows:

Enter 49 under Substitution of Incoming Number Prefix.
Enter 0 under substitute with.
Leave the remaining settings unchanged and confirm them with OK.

	Note
	If the PBX Wizard is used again for this connection, then all settings are reset in the VoIP -> Settings -> SIP Provider menu.