optiPoint 150 S setup for SIP IT Service Provider

In this How To article you find an overview and a detailed description about how to setup the optiPoint 150 S with several SIP VoIP Service Providers.

Basic configuration
The following comparative tables show mandatory configuration parameters in order to setup the optiPoint 150 S with different SIP VoIP Service Providers. The paths in the sub-section headlines refer to the Web Based Management interface of the optiPoint 150 S.

Please note that, in some cases, it is not possible to make use of all optiPoint 150 S features when connecting to a certain SIP VoIP Service Provider. For further information the optiPoint 150 S overview of SIP IT Service Provider features list will help.

You are free to add in the tables below all the settings for your favourite SIP VoIP Service Provider.

Network > Interface


The usage of the DHCP function is recommended. If you require a static IP address due to special circumstances (e.g. for registration of several devices within the same network environment), deactivate the checkbox for the DHCP function.

The required information on how to set a static IP address can be found in the optiPoint 150 S Administration Manual.

SIP Setup > SIP Settings


SIP Setup > STUN Settings


{| ! ! STUN ! Server Address ! Server Port
 * 1&1
 * On
 * stun.1und1.de
 * 3478
 * bellshare
 * On
 * stun.bellshare.com
 * 10000
 * blueSIP
 * On
 * stun.bluesip.net
 * 3478
 * Freenet
 * On
 * iphone-stun.freenet.de
 * 3478
 * GMX
 * On
 * stun.gmx.net
 * 3478
 * Nikotel
 * On
 * calamar0.nikotel.com
 * 3478
 * Sipgate
 * On
 * stun.sipgate.de
 * 10000
 * STRATO
 * On
 * iphone-stun.strato-iphone.de
 * 3478
 * T-Online
 * On
 * stun.t-online.de
 * 3478
 * XSip
 * Off
 * -|}
 * 3478
 * T-Online
 * On
 * stun.t-online.de
 * 3478
 * XSip
 * Off
 * -|}
 * Off
 * -|}
 * -|}
 * -|}

SIP Setup > SIP Extensions


User Setup > Localization


SIP VoIP Service Provider specific default configuration file
The easiest way to get started with your optiPoint 150 S is to load a pre-configured file depending on the SIP VoIP Service Provider you want to be connected to.

In the table below you can find the various default configuration files for each certified SIP VoIP Service Provider: the table provides you with the possibility to upload all necessary settings to your optiPoint 150 S at once.

Use the Restore Settings function provided by the Web Based Management interface and upload the default configuration file via HTTP.

After setting your SIP-ID, your SIP-Password and, if desired, the phone name, you can directly connect to your preferred SIP VoIP Service Provider after the telephone has restarted.

Further configuration documents
In the table below you can find various configuration documents available for the following German SIP VoIP Service Providers:

If your provider is not listed here, please refer to the general.