When configuring DIALING RULES we need to know exactly how the number must be concatenated for dialing

- internal company calls ( the call is not routed outside your local loop)
- local calls within your area code
- for long distance calls within your country but outside your area code
- for international calls outside your country

To properly set those, we need to know the following codes like 

"exit code", "country code", "area code", "trunk code", "access code".

First of all, we need to define what is our 
* country code -> Country calling codes are used to dial phone numbers internationally. Each country has an assigned code of its own. In order to dial an international phone call you must always use a country code before the actual subscriber telephone number.
* exit code -> Exit codes, also known as international access codes or international direct dialing (IDD) codes automatically redirect telephone calls to a foreign country. It is the first code you dial when calling abroad. You may replace it with the plus sign (+).

This setting depends on the country you are in.
For example if you are located in United States, your Country Code is 1 and the Exit Code is 011.
If you are located in Germany, then your Country Code is 49 and the Exit Code is 00.
If you are located in Australia, then your Country Code is 61 and the Exit Code is 0011.

Exit Code is a sequence of digits you need to dial for international calls. If a person in Australia wants to call into Germany, then they must dial their own Exit Code 0011 and the Country Code of Germany 49.

For non-international calls, we need to define what is the 
* TrunkCode 
and what the 
* local AreaCode.

National TrunkCode is used to place calls within a certain country. It is the sequence of digits that must be dialed before the Area Code. It is left out when dialing in from abroad.
If you are located in United States, then your Trunk Code is 1.
If you are located in Germany, then your Trunk Code is 0.
If you are located in Australia, then your Trunk Code is 0.

*Access Code is code dialing for accessing phone lines outside your companies phone network. Regardless if you want to make an international call or noninternational call. If the call is internal between the local companies extensions, then the Access Code needs not to be dialed, since there is no need for accessing outside phone netwoork.

For more help please check this side -> https://www.howtocallabroad.com/codes.html

The sintax for internation calls is 
[Access Code] + [Exit Code] + [Country Code] + [Area Code] + local subscription number 

The sintax for long distance calls is 
[Access Code] + [Trunk Code] + [non-local Area Code] + local subscription number 

The sintax for local calls is 
[Access Code] + [Trunk Code] + [local Area Code] + local subscription number 
or if the local area code is not required
[Access Code] + local subscription number 

The sintax for internal calls between the local company extensions is to dial only the internal extension (usually not longer than 4 digits).

To set those settings you need to define the Dialing Rules in Phone and Modem settings. 
If you have troubles succesfully dialing the numbers over our CTI, you need to pass us the syntax form for 

• international calls
  [Access Code] + [Exit Code] + [Country Code] + [Area Code] + local subscription number 
• for long distance calls
  [Access Code] + [Trunk Code] + [non-local Area Code] + local subscription number 
• for local calls
  [Access Code] + [Trunk Code] + [local Area Code] + local subscription number 
  
  

To verify the settings go into TIClient / Setup / Phone tab. 


After you press the Apply button, those settings will be stored in the Windows LOCAL_MACHINE registry
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Telephony\Locations\Location

Note: Because the registry branch Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Telephony\Locations\Location has restricted permissions for modifying values, you might need to apply those settings via the official Windows Phone and Modem (telephon.cpl) tool. 
Otherwise the changes you made in the TIClient  / Setup / Phone / Dialing Rules, will not be saved. 

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