VoIP service enables transmitting voice via computer network or another medium accessible for IP protocol. Telephony over the Internet, Intranet, or any other data connection is used.



Name The name of a given tariff as it appears in the system
Abbreviation The name that will appear on an invoice
Price incl. VAT Price incl. VAT per month The price excl. VAT will be automatically calculated based on the setting of the VAT rate in the dph key in Invoicing Settings General.
Accounting codes

Application of items for needs of double-entry bookkeeping. Set it up in Invoicing Settings Accounting.

Advance payment - Credit

Clients can make prepayments for a particular tariff.

If you check the box, the monthly amount you have entered will be deducted from the amount that a given client should pay for calls. If the amount this client should pay is lower that the prepayment amount, the full prepayment amount will be invoiced. In practice, that means that if the prepayment amount is 100 CZK and the amount that should be paid for calls is 250 CZK, a given client has prepaid 100 CZK and will be additionally charged 150 CZK. If the total call cost incurred by the client is only 50 CZK, they have prepaid 100 CZK and no further amounts will be charged.

If the box is not checked, the client always pays the prepayment amount + the full charge for calls made.

Tips on how to use this documentation



Searching required information is possible either via structured menu which is divided into sections, or via full-text search of the entire contents of this on-line documentation.

This aid will make it possible for you to find out where exactly you are at the moment.

If, for example, the following appears beneath the main menu - ISPadmin Wiki / ENG / Client management / Menu - CLIENTS / Clients / Message Board / Groups - it means that you are:


  • in the Wiki documentation of the ISPadmin system
  • in its English localization
  • in the Client management section
  • in the Clients tab
  • in the Message board subtab
  • in the Groups sub-subtab


It contains newly added functionalities and modifications of the system which are displayed by versions and issue date. Changelog articles are also displayed in individual sections / pages of the documentation which relate to new functionality or modification. 

Basic orientation

You will find a welcoming menu with basic instruction on trying / implementing / using below. 


Frequently asked questions along with most important procedures and settings are listed in FAQ section. 


Items which refer to real system menu are highlighted in corresponding colour, including their graphical background. Eg. Invoicing Settings Templates Reminders. This is also a working reference to an article. 


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