--- title: TAPI Configuration slug: voice-german/tapi-configuration docTags: createdAt: 2024-03-14T22:29:44.305Z --- The following settings have an impact on the TAPI interface or call handling. ::Image[]{src="https://helpserver.biz/onlinehelp/cdc/sf/5.0/help2000/images/expert-tapi.jpg" size="86" width="451" height="454" position="center" showCaption="false"} ## External call - Prefix If the TAPI driver adds a prefix for an external call, this prefix can be removed. Otherwise prefixes can be added before the number is dialed. Example The phone number 0734273830 is signalled as **0**0734273830. In this case the prefix 0 has to be removed to allow a correct caller identification. If the TAPI driver signals the incoming phone number **without a leading 0**, then configure: Place prefix, Incoming. Example The phone number 0734273830 is signalled as 734273830. In this case the prefix 0 has to be added for incoming calls to allow a correct caller identification. :::hint{type="info"} By default, the prefix to get an outside line is added as *Outgoing, cut prefix* to automatically remove the prefix after dialing. ::: ## Prefix for internal numbers This function allows to place a prefix **in front of** an internal number. It is not used for dialling - only for **incoming and outgoing caller identification.** Example For all employees the complete phone number is stored in the database, e.g. 07342/7383-12. For an incoming call, only the extension number is signalled, e.g. 12. In order to find the name of the calling person, the prefix 7383 has to be added. Additionally, CTI Data Connector for Salesforce® adds the area code, configured in the country settings. Configure **7383** for the prefix which will firstly create the number 738312 and then will add the area code. This results in the new number 07342738312 which will allow to identify the caller. ## Provider Postfix This function allows to add a postfix **at the end** of a phone number for **outgoing calls.** Example IP providers often require a # at the end of the phone number to dial the number instantly. Configure **# **for the postfix which would dial 07342738312**#** ## Truncate incoming phone number at: This option is needed with IP phones and a TAPI driver which passes the phone number with IP information. Example The phone number is passed as *0734273830\@myprovider.com*. This option allows to truncate all characters after the specified character - e.g. @. ## Ignore Fake Number Some TAPI drivers firstly send a special number for **outgoing or incoming calls **and then the correct phone numbers. To allow for the special number being treated as a fake number being ignored, configure the fake number. Example The TAPI driver firstly sends 879 and then the correct phone number. Configure **879 **as the fake number. You can configure a list of numbers, separated by a semicolon. Example 879;888;890 **Don’t signal updated phone number during a call** If a phone number changes during a call (e.g. because the call was redirected from the main switchboard), the new phone number will be updated by default in the Desktop Notification. The update can be suppressed by checking this option. ## Controlling CTI Application If a application uses the windows dialer, CTI Data Connector for Salesforce® can be configured to handle all requests that go to the windows dialer. This allows to use the call logic for outgoing calls of CTI Data Connector for Salesforce® . ## Activate call logging This configuration is intended for service purposes. It logs the events of the TAPI device driver. See [How do I send a log file?](docId\:AJ_OxM25nTJWeIKfNKcek) ***See also*** [Where do I find this screen?](https://helpserver.biz/onlinehelp/cdc/sf/5.0/help2000/wizard_-_expert-settings.html)