A2billing - WHMCS Create & Control Post Paid VoIP accounts Module (A2Post Paid)

A2billing - WHMCS Create & Control Post Paid VoIP accounts Module (A2Post Paid)

Developed By Cloud4Hosting.eu

Compatible with WHMCS v7.8


A2billing WHMCS Post-paid module allows you to offer SIP/IAX VoIP subscriptions on a2billing - Asterisk, And charge fixed monthly fees and or setup fees for each extension.

The module will also import from a2billing the monthly call usage amount and create an invoice in WHMCS, Once paid it will also add the payment in A2billing to keep the reports correct.

With this module set up, you can further secure your A2billing server and use WHMCS as your client front end instead of A2billing client area.

Top Features

  • Create, Suspend / Un-suspend, & terminate A2billing Postpaid account
  • Add / Remove SIP/IAX Extensions
  • Passes client number as CallerID & option to Change Caller ID
  • Send Welcome Email with SIP/IAX account details
  • Create products with SIP/IAX configuration options (such as a2billing client group, call plan, TYPE, NAT,ALLOW,DISALLOW, Invoice generation day etc..)
  • Set maximum negative credit A2billing balance
  • Set A2billing invoice day per product
  • Import A2billing monthly call usage invoice (Automatically on daily basis or manually)
  • Set A2billing invoice as paid once WHMCS invoice is paid (monthly call usage)
  • Offer free credit for new A2billing / SIP/ IAX accounts
  • Extend A2billing payment options by using any WHMCS supported payment gateway

Configurable Options to be set by client

  • IP Based SIP/IAX Authentication

Client Area:

  • Show Balance on A2biilling + SIP/IAX/A2billing Info
  • Change SIP/IAX Secret / password
  • Call Rates (per client assigned call plan)
  • Call History (Includes search, Download PDF,CSV,EXCEL & Printable version)
  • Create new SIP/IAX extensions
  • All client area files are fully editable & customizable using the provided .tpl template files.


  • Uppon invoice payment in WHMCS, the module Will automatically mark the invoice as paid in A2billing, as well as create receipt & e-payment logs to keep correct reports data.



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Scott Petrie @scott9864

October 10, 2019 at 02:45:18 PM

Just a warning: I never was able to get this Post paid module to work in prevision version WHMVS 7.7 & below, too many broken and borked php errors, and I gave up It was mess! The prepaid module worked (barely) but updates were often broken or incomplete! Once I even got un-encrypted version, so I guess you can say the quality control are not up to WHMCS standards!

I had this module and the prepaid for a few years but their ability to ensure that it was updated and "offered" existing clients updates was a bit slow. Even though I paid for yearly support for many years, I couldn't download updates from my account, when logging into my account, I always had to create a support ticket because the download link in my account was always pointing to an older and very out of date version and after a few years I gave up on this company (I quit using this software in September 2019)

I hope they improve, but after a few years they didn't change!

  • 4 years ago

Version Compatibility

Compatible with WHMCS v7.8

Full Version Compatibility

  • All versions of WHMCS v7.8
  • All versions of WHMCS v7.7
  • All versions of WHMCS v7.6
  • All versions of WHMCS v7.5
  • All versions of WHMCS v7.4
  • Selected versions of WHMCS v7.3
  • All versions of WHMCS v7.2
  • All versions of WHMCS v7.1
  • All versions of WHMCS v7.0
  • All versions of WHMCS v6.3
  • All versions of WHMCS v6.2
  • All versions of WHMCS v6.1
  • All versions of WHMCS v6.0

System Requirements

  • A2billing v2.0+
  • Asterisk - Realtime

* Requirements listed are in addition to the WHMCS default system requirements.

Support for this product

The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.

Developed By Cloud4Hosting.eu


v4.4.5 Released September 18th, 2019

Latest Version

  • Added compatibility for WHMCS 7.7.x and 7.8.x


Previous Versions

v2.4.4 Released June 12th, 2018

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###General Updates & Fixes

  • Added compatibility for WHMCS 7.5.2+
  • PHP 7.2+ using Ioncube 10.2+
  • Fix for “Invalid License” issue due to changes on the license server


v2.4.3 Released April 19th, 2017

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###General Updates & Fixes

  • Added compatibility for WHMCS 7.2-7.4 (On 12 Feb 2018)
  • PHP 5.6-7.0
  • Fix for import invoices on WHMCS 7.x


v2.4.2 Released October 6th, 2015

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New Features

  • Added Option to Apply TAX on A2billing imported invoices
  • In product page, the username is removed after termination


v2.4.1 Released September 30th, 2015

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Quick fix

  • Fully compatible with WHMCS 6.2+
  • FIX: Call rates & Call history: Fix included file not found issue on some PHP installations
  • FIX: Call rates & Call history is accessible also on callhistory.php, callrates.php


v2.4 Released September 6th, 2015

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General updates

  • Fully compatible with WHMCS 6.2+
  • Supports PHP 5.3/5.4/5.5
  • Invoicing cron integrated into WHMCS
  • All main module settings are now under the Addon module (in addition to the per product settings)
  • Improved error logging, added logging to Module log
  • In addition to the daily invoice synchronization with a2billing, now its possible to manually synchronize invoices by entering the desired date.


v2.2 Released June 1st, 2015

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Client Area

  • Random SIP/IAX Secret Generator/Updater
  • Added Product detailed info (Balance,SIP/IAX/A2billing Info) Template file: clientarea.tpl
  • Added Call History / Call Rates links to product page
  • Call History export to PDF,CSV,Excel,Printable version

Added functions

  • Admin: Change Caller ID (Once Phone number changes, click on "Change caller ID" to update A2billing)
  • A2billing cron job is now on WHMCS, and will log all events in WHMCS Log Activity
  • Added new WHMCS Client Field for A2billing ID
    – A2billing Admin URL can be set
  • Module product settings renamed
  • Module can work with non empty A2billing - Works with A2billing -> WHMCS Client Synchronizer


vv2.3 Released June 29th, 2015

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General Fixes

  • Bug fixes


See also

FraudLabs Pro Fraud Prevention

Fraud prevention plugin to prevent fraud, reduce fraud chargeback & high risk transactions

Order Notes

Staff need to make a note

WHMCS Order Assistant

Order Assistant helps you to automate order management process. It can automatically accept Pending Orders; send an email or open a ticket with client; and cancel the order if no payment is made still.

IPQS Fraud Prevention & Order Validation

Accurate risk analysis for orders & users to prevent fraud and minimize chargebacks.

Lara, Fraud Control

Allow you to to have custom fraud control per payment gateway.