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Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server.


Getting Started
with Asterisk

It is used by small businesses, large businesses, call centers, carriers and government agencies, worldwide.

Asterisk Overview

Today, there are more than one million Asterisk-based communications systems in use, in more than 170 countries. Asterisk is used by almost the entire Fortune 1000 list of customers. Most often deployed by system integrators and developers, Asterisk can become the basis for a complete business phone system, or used to enhance or extend an existing system, or to bridge a gap between systems.

  • TDMoE (Time Division Multiplex over Ethernet)
  • Allows direct connection of Asterisk PBX
  • Zero latency
  • Uses commodity Ethernet hardware
  • Voice-over IP
  • Allows for integration of physically separate installations
  • Uses commonly deployed data connections
  • Allows a unified dialplan across multiple offices
Read More

Asterisk Key features

Asterisk-based telephony solutions offer a rich and flexible feature set. Asterisk offers both classical PBX functionality and advanced features and interoperates with traditional standards-based telephony systems and Voice over IP systems. Asterisk offers the advanced features that are often associated with large, high end (and high cost) proprietary PBXs. The list below includes a sample of the features available in Asterisk.

  • ADSI On-Screen Menu System
  • Alarm Receiver, Append Message, Authentication, Automated Attendant
  • Blacklists and Blind Transfer
  • Call Detail Records, Forward on Busy, Forward on No Answer, Forward Variable, Monitoring, Parking
  • Call Queuing, Recording, Retrieval, Routing (DID & ANI), Snooping, Transfer, Waiting
  • Caller ID, Caller ID Blocking, Caller ID on Call Waiting
  • Calling Cards
  • Database Store / Retrieve and Database Integration
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Asterisk Call Features

  • SMS Messaging
  • Spell / Say
  • Streaming Hold Music
  • Supervised Transfer
  • Talk Detection
  • Text-to-Speech (via Festival)
  • Three-way Calling
  • Time and Date
  • Transcoding
  • Trunking
  • VoIP Gateways
  • Visual Indicator for Message Waiting
  • Stutter Dialtone for Message Waiting
  • Voicemail to email
  • Voicemail Groups
  • Web Voicemail Interface
  • Zapateller
Read More

Asterisk VoIP Protocols

The dialplan is composed of one or more extension contexts. Each extension context is itself simply a collection of extensions. Each extension context in a dialplan has a unique name associated with it. The use of contexts can be used to implement a number of important features, such as security, routing, auto-attendant, multilevel menus, authentication, callback, privacy, macros, etc.

  • Google Talk
  • H.323
  • IAX™ (Inter-Asterisk eXchange)
  • Jingle/XMPP
  • MGCP (Media Gateway Control Protocol
  • SCCP (Cisco® Skinny®)
  • SIP (Session Initiation Protocol)
  • UNIStim
Read More

Asterisk User Portal

  • Direct Inward System Access
  • Distinctive Ring
  • Distributed Universal Number Discovery (DUNDi™)
  • Do Not Disturb
  • E911
  • ENUM
  • Fax Transmit and Receive
  • Flexible Extension Logic
  • Interactive Directory Listing
  • Interactive Voice Response (IVR)
  • Local and Remote Call Agents
  • Macros
  • Music On Hold
  • Music On Transfer
Read More
The Swiss Army Knife Of Communications

Asterisk is in use today as the core engine of many communications applications.

Ultimate Flexibility

You might wonder how a single software package can serve so many different functions.

Amazing Potential

With Asterisk , you have the potential to tie communications into any application or business function.

#1 open source communications toolkit

Asterisk is full of open-source VoIP communication application


2 Core Dedicated Server

Intel® Xeon E3-1270 v3 2.40 GHz

$49 / month

  • 4 GB RAM
  • 250 GB SCSI Hard Drives
  • Internet Port 100 Mbps
  • Bandwidth 5000 GB
  • 24x7 Monitoring System
  • Network Uptime SLA - 99.999%

8 Core Dedicated Server

Intel® Xeon E5-2630 v3 2.60 GHz

$129 / month

  • 16 GB RAM
  • 500 GB SCSI Hard Drives
  • Internet Port 100 Mbps
  • Bandwidth 20 TB
  • 24x7 Monitoring System
  • Network Uptime SLA - 99.999%

8 Core Dedicated Server

Intel® Xeon E5-2630 v3 2.60 GHz

$149 / month

  • 16 GB RAM
  • 500 GB SCSI Hard Drives
  • Internet Port 1 Gbps
  • Bandwidth 50 TB
  • 24x7 Monitoring System
  • Network Uptime SLA - 99.999%

16 Core Dedicated Server

Intel® Xeon E5-2630 v3

$380 / month

  • 64 GB RAM
  • 500 GB SCSI Hard Drives
  • Internet Port 100 Mbps
  • Bandwidth 20 TB
  • 24x7 Monitoring System
  • Network Uptime SLA - 99.999%

What does Voipswitch do?

General Information About Voipswith
Voipswitch Class 4/5 Softswitch is a multiservice telephony server that leverages SIP and other related communication protocols.

  • Yes, we offer both to rent and to onetime installation to your server. You can install it for any type of open source IP telephony project like a call center, IP PBX, SIP server, voice bursting, voice marketing.

  • Yes, we give training and others tutorial documentation with videos. Usually we provide an online session but also when requested we provide onsite training, it can be in our offices or at customer.

  • Yes, we work with the datacenter in USA and Europe an can offer you a full of package including server, backup, IP addresses etc. If you are asian, we have high redundant singapore server also we care about terminated and call genaration server location which you get better call quality to fine tune. We can suggest you which colocation is better for your termination.

  • The initial release of Certified Asterisk was based on Asterisk 1.8.11. The numbering for Certified Asterisk releases reflects the open source version from which they are built. For example, asterisk-1.8.11-cert1 was the first certified release, derived from Asterisk 1.8.11. Versions following the initial release have been made against both Asterisk 11 and Asterisk 13 releases. For more information about the various versions of Asterisk, please see the Asterisk Versions wiki page.

  • Yes, it can be branded, not only logo can be changed but the whole skin which is based on web backend preferences. You can do it yourself or order it at our design team.

  • The billing system is built in the Asterisk platform and is fully integrated with Softswitch providing realtime and rating functionality among many other converged billing features. It uses an external database to store the data.

  • Certified Asterisk is available as RPM packages from or as source code from or


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