Core4Switch is a versatile switching platform with integrated billing. Its robust and flexible architecture has been designed to meet the particular requirements of retail as well as wholesale VoIP operators. Its standalone single server deployment provides small to medium service providers an easy start, while its deployment in distributed architecture makes it suitable for larger IP carriers or telecom providers.

• Wholesale Services for VoIP Carriers, individual VoIP Traders
• Retail services for Calling Card, Callback, Callshop
• Complete Solution for IPTSPs, MVNOs
• Up to Level 5 Reseller System to Manage Distribution
• Clustering Solutions for Telecoms to handle millions of users and traffic
• Integrated Messenger Services for Computers, Mobile Phones, Tablets

General Features

1. Act as SIP proxy server, registration server and B2B user agent.
2. Media gateway for audio proxy and IVR support.
3. Both GK register and GW clients support.
4. Advance Tariff management with resolution, surcharge and minimum duration support
5. 5 level of Resellers chain management.
6. Prefix based dial plan support with priority and balance sharing features.
7. Routing based terminations
8. Advance reporting
9. Route users management
10. Pin 2 Pin call facility
11. IVR support for minute and balance
12. Firewall protection for both sip and billing
13. Secure HTTPS billing
14. Notification by SMS and Email for login or any other activities in billing.
15. Mobile/tablet browsers support

High Performance

Core4switch is designed for high performance and reliability. In a single switching platform it can handle 20,000+ concurrent calls with a stable and smooth manner. It can operate with 1300+ cps (calls per second) with no call drop and high speedy call connects.

Built in Firewall

It’s built in firewall protection rescue vendors from illegal call connect and protect loss in VOIP business.

Secure Billing

Its secure billing platform protects all unauthorized access and hacking. Secure https Protocol gives you most secure access to the billing. OTP (one time password) using 2FA (two factor authentication) features protect your account from accessing by any third party in case of password hijacking. It’s built in country lock feature make you safe to restrict login from suspicious areas.

Audit Trail and SMS/Email Notifications

Cores4witch built in audit trail help you to see all of the billing activities. It will help identify any unauthorized access and protect you to stop it. Notification system email or SMS you in specified circumstances to alert what is going on.

Both Wholesale and Retail

It can operate as wholesale or retail or both. Its class5 and class4 features give all in one support for VoIP providers to run their business.

Data Migration from other SoftSwitches

Its migration feature makes it very easy to import your previous data from any other softswitches to core4switch. Currently it highly supports migrations of VoIPSwitch, ItelSwitch, VOS3000, MtelSwitch, Nexge, etc.

Automatic Data Backup and Restore

Automatic data backup and restore features rescue you from any damage in system protect VoIP business from any loss.

PIN to PIN Calling

Hassle free internal PIN to PIN calling system will help your user call them internally without any routing.

Multiple Reseller Levels

Core4switch currently supports up to 5 levels of resellers. All resellers have their own billing platform to manage their clients and payments.

API Integration

API Integration with any website, Mobile dialer, PC dialer, Payment Gateway and other platform for any data sharing.

Advance Call Simulation and Active Call Viewer

Call log features helps you to identify any call related problem to fix and gives you a detail view of full cycle of a call. Active call analyzer helps determine how much call running in system with ringing/progressing/incall counting with search features by IP/login/callerID/termination etc.

Mobile, Smartphone, Tablet compatible Billing

Core4switch billing supports all type of mobile browsers like Symbian, Android, iOS or any other latest tablets. For small and old mobile devices like Symbian it has special templates for Client and Reseller panels.

Mobile and PC Dialers

Mobile dialer for Symbian, Android, and iOS, and PC dialers are giving retails service providers a wide range of business.

Automatic Balance Protection

Balance never go negative and call will drop immediately if balance goes negative to protect your funds.

Fast Call Connects

Core4switch’s built in caching mechanism makes fast call connects. Its call drop immediately in PDD goes higher than a certain value and try next available route.

Intelligent Routing

Routing based on priority, balance share. LCR, PBR and Performance based Routing.

Advance Reporting

Daily , weekly , monthly and yearly based reporting for profits/losses and reseller, client, termination vendor, etc. wise reports .

Easy Import and Export of Tariffs

Core4switch makes it very easy for tariff import and export from csv or excel. User can import high volume of tariffs in a simple user interface.

Authentication server

Single authentication, authorization and address translation.

Registrar server

Registration based on authentication, authorization and location detection.
The registrar server accepts REGISTER requests and places the information it receives in those requests into the location service for the domain it handles. Users register to the registrar server by using their credentials that information will save in database. A registrar server responds to location requests from other servers.

Routing server

Call Routing and Route Caching and User to User Intelligent Call Management.

Notifications server

This server initiates all the notifications to administrators, resellers and clients.

Media Gateway

Playing IVR for calling card users and perform as a proxy gateway for RTP media.
Media gateway provides services for Calling Cards and Unified Communication features. It is responsible for playing audio from files, playing numbers, providing Voice mail. Also Records conversations to a file or live streaming format.


Encryption, Decryption, Packet saving, Qos Based on Packet Calculation, Audio Recording.
CoreSaver works as a VPN. A VoIP VPN combines voice over IP and virtual private network technologies to offer a method for delivering secure voice. Because VoIP transmits digitized voice as a stream of data, the VoIP VPN solution accomplishes voice encryption quite simply, applying standard data-encryption mechanisms inherently available in the collection of protocols used to implement a VPN.
CoreSaver mainly used to unblock VOIP packets (SIP RTP) in any blocked networks. All data encrypted here with AES (Advanced Encryption System) with secured keys. Keys here generated each side separately and transmit each other to decrypt packets in the destination.
Coresaver also reduce packet size by compressing rtp headers each side. Its reduces packet loss and give more good voice quality and help maximizing ACD and ASR.

STUN Server

provides Real IP / Port detection for NAT. The STUN protocol allows applications operating behind a network address translator (NAT) to discover the presence of the network address translator and to obtain the mapped (public) IP address (NAT address) and port number that the NAT has allocated for the application's User Datagram Protocol (UDP) connections to remote hosts. Stun server helps local sip devices behind NAT to detect real ip address and fix the problem of one way voice.

Password Management System

Provides Encrypted Password and Decrypt based on user demand.
Password management is a type of password management used to secure the passwords for login IDs that have elevated security privileges. We provide standard password encryption system built by our own algorithms. We also using force password reset system when required and controlled password availability.

Messenger Server

Provides Services for User to User Messaging System, Message archiving.

Fraud Detection Server

Intelligent Fraud Detection and Blocking System. We have Integrated Fraud Detection Management System. The system is a combination of Audit Trail, Captcha Management System, Failed Auth Management System, OTP Authentication, User Agent Management, Notification Management System, IP Access Management (Black List, White List) etc, by which we can track/monitor the suspicious activities. Right now, we have started working on GEO IP Management System which will reduce the security risk factors a bit more.

Billing System

Providing Full Features Management.
Core4Switch Billing System provides full VoIP Management Features based on Core4Switch System. The billing system facilitates interactive User Management (up to five level reseller), Tariff, Routing, Dial-Plan and Call Management. Also, covers a wide range of Reports.
Core4Switch Billing System provides a variety of Advance Features as well as Improved Security Management Features, Ease of Access, Device based Supports.

Database System

Supports MySQL or PostgreSQL. Right now we have MySQL DB support. But near future we will upgrade our Application Framework to support PostgreSQL.

Web Server

Supports Apache and NginX.
Most web based applications whose basic development ground is PHP/MySQL, run on apache but also on nginx web servers. Both are powerful and effective servers. They are free, open-source, cross-platform web servers. The reasons for each respective server’s popularity are clear: apache’s power and nginx’s speed are well known.
Apache is undoubtedly the best known process-based server on the other hand nginx is noted to be a good and scalable web server for sites that need fast, efficient serving of contents. nginx acclaimed for having low memory usage.
Regarding the nature of web application and its usage, the best one is chosen or migrated from one to another. Considering the application level and user activity of Core4Switch Billing System, it is decided to which server is best suited for.
Right now, Core4Switch Billing System is already running on Apache successfully, but the experimental deployment of the Core4Switch Billing System on nginx server is going on also. Near future, we will have the full support on both web servers.


Core4switch support SIP and RTP protocols for voice communication. Compatible RFC’s are
1. RFC 3261 - SIP: Session Initiation Protocol
2. RFC 3263 - Locating SIP Servers
3. RFC 3264 - An Offer/Answer Model with SDP
4. RFC 3550 - RTP: A Transport Protocol for Real-Time Applications
5. RFC 3551 - RTP Profile for Audio and Video Conferences with Minimal Control
6. RFC 3555 - MIME Type Registration of RTP Payload Formats
7. RFC 4566 - SDP: Session Description Protocol
8. RFC 3489 - STUN - Simple Traversal of UDP Through NATs

Sales Contact

Khaled Md Ali
Customer Manager
Telco Services
Sales +8801730071022, +88017 30071019
Skype: core4voip, support@core4voip.com
Email: sales@divineit.net

Sales Contact

A K M Forhad
Chief Marketing Officer
Telco Services
Cell +8801730071010
Skype: core4switch
E: sales@divineit.net