Calling card service

MYVOIPAPP Support Team

1. Introduction


"Calling card" is a virtual card service. It is more like a prepaid account which users can use it to make outgoing call in any SIP clients who have been connected to MSS. With "calling card", the balance is controled. Each calling card has some balance. If the balance is not enough, the user cannot use it to make outgoing call. When one call is finished, some fee will be decreased from the balance.

In another way, MSS can limit some SIP clients to make outgoing call; the feature is "call level". User can use "calling card" to suppress the call level and make outgoing call.

In miniSipServer (MSS), the default called number prefix for "calling card" is "*300*". That means the calling card service will be triggered if the user dials "300*". Below figure describes the basic process of this service.

calling card service flow

MSS version 3.1 or above can support this service (previous version can only support simple calling card feature). Please download it from

We need configure MSS to support this service. These configurations include:

2. Basic Configuration

2.1 Remote database

In current phase, MSS can only support MySQL database (please download MySQL from and install it firstly).

Please click menu "Data->System information->Remote database" and configure the parameters according to your MySQL configurations.

system information configuration

Item Value Description

Database address

domain name or IP address

Remote MySQL address.

Note, MSS and MySQL can be installed in the same computer. In this case, the "database address" should be "localhost".

Visit port


Remote MySQL visit port. If you updated port in MySQL configuration, you need update this configuration in MSS too.

The default value is 3306. Please refer to MySQL manual document.

User name


The user name which is created in MySQL database.

The user should have the right to create database, create tables, etc.



Password of the visit user. It depends on MySQL configuration.

2.2 Limit called number

In default, all called numbers in MSS can be routed for all local users. If we want to deploy calling card service, of course, some called numbers or all called numbers must be limited. For example, we can limit users that they cannot make out-group call but they can do it through calling card.

What we should do is set "call level" for such called number. Please click menu "Dial plan->Called analysis" and select or add called prefix to edit. For example, we limit the call level for "external line" call to 1. That means the call will success if the user has "call level 1" right or through "calling card" service.

call level configuration

2.3 Charge information

Since "Calling card" is a prepaid service, it is important to configure prepaid information. It includes following configuration: (1) Configure prepaid rate; (2) Configure fee matrix.

calling card menus

2.3.1 Prepaid rate

Please click menu "Services->Calling card->Prepaid rate" and prepare to add a new prepaid rate.

prepaid rate dialog

Item Value Description



Indication of current record.



Interval for calculating fee.

The unit is "second".



Fee for each "Interval".

One-time fee


Once the call is answered, this fee will be reduced from the balance just one time. It can be zero and optional by default.

For an example, "ID=1; Interval=60; Tariff=10; One-time fee=20". It means that MSS should reduce 20(cents,etc) immediately when the call is answered and reduce 10(cents,etc) from the card's balance every 60 seconds.

2.3.2 Fee matrix

Please click menu "Services->Calling card->Fee matrix" and prepare to configure how to calculate fee.

fee matrix

"Dial plan" plus "called number prefix" to be a unified index to identify a record.

Item Value Description

Dial plan


The dial plan gotten from basic call. By default, it is used to do "analysis called number" to get final routing.

Called number prefix


The destination prefix which the call will be routed.

This field can be set with "*". That means for all destinations.

Different dial plan with the same called number prefix can be assigened with different charge traffic.

Prepaid rate ID


Prepaid rate for calculating fee.

This ID is configured in previous section "2.3.1Prepaid rate".

For examples:

We configure following records in the "fee matrix" table.

Dial plan Called number prefix Prepaid rate ID Description













Any subscribers call destination with prefix "10", the rate "4" will be applied.




Any subscribers call destination with prefix "1", the rate "5" will be applied.




For all prepaid subscriber and all destination, the rate "6" will be applied.




Then, we can see which rate will be applied in following cases.

2.4 Card information

A card always includes following information: card number, password for this card and balance.

Please click menu "Services->Calling card->Card information" to add or edit a card information.

card information dialog

Item Value Description



Card number.



Password for this card.

This item can be blank. If it is blank, the service logic will not prompt users to input password.




Change dial plan

yes or no

It is used to indicate whether it is necessary to change dial plan.

Once the dial plan is changed, MSS will use the new dial plan to search the fee matrix. In another way, MSS will use the new dial plan to do "analysis called number" for routing.

New dial plan


New dial plan to replace previous dial plan gotten from basic call. Once it is changed, the final routing may be effected together.

3 Advance configuration

3.1 Announcement files

As described in chapter "Introduction", several audio will be played to caller party. These audio files are recorded in English default. All audio files are installed in directory "mss_install_directory\ann". You can replace them as you want.

Please refer to document "record our own audio" for details.

3.2 CDR

A table will be created in MySQL database to store all CDRs of these calling cards. The table name is 'tbl_callingcard_cdr'. The advance user can visit or query it directly.