Free Business VoIP Phone System & Call Center in Bitrix24

If you are looking for a free VoIP phone system for your small business, Bitrix24 is what you need. Unlike other voip solutions, Bitrix24 works both as your internal PBX system and as contact center for inbound and outbound calls. It’s also the only free voip system that comes with fully featured free CRM. Importantly, when you clients call you from a phone number recorded in CRM, they will be identified, connected to assigned manager and their phone call will be logged and recorded, if necessary. Bitrix24 is available in cloud and on premise as self hosted software that can be installed on your server (the latter version comes with open source code access).

Use Bitrix24 to call to any mobile phone or landline, domestically or internationally. You don't need any special IP-telephony equipment, you can call from your Bitrix24 portal anywhere where there's a reliable internet connection.

You can set up Bitrix24 as cloud or self hosted call center software.

Basic features

  • Free incoming calls (ex. toll free);
  • Outgoing calls are $0.01/minute;
  • Automatic dialer ($), IVR ($$);
  • Local/toll free number rental $6/mo;
  • Phone numbers in 43 countries;
  • Built in PBX;
  • Built in Call Center;
  • Built in CRM;
  • WebRTC;
  • Mobile app (iOS/Android) and Desktop app (PC, MacOS);
  • API, Marketplace, Source Code;
  • 100% free for up to 12 users.

Business Phone System

  • Employee extensions;
  • Phone business hours;
  • Relay phone number;
  • Call waiting;
  • Call transfers;
  • Call forwarding;
  • Call queuing;
  • SIP/voip phones;
  • Softphones.

Real Time Communications

  • WebRTC;
  • IM and Group Chat;
  • Audio/Video calls;
  • HD Video conferencing;
  • Screen sharing;
  • PC/Mac/Linux/iOS/Android.

CRM and Call Center

  • Click to call;
  • Call to CRM;
  • Missed call to lead;
  • Call Recording;
  • Client ID;
  • Autoconnect to assigned manager;
  • Email marketing;
  • Telemarketing.

5,000,000+ organizations have chosen Bitrix24

Click here to get more info & register free

Internet Protocol Suite

What is Internet Protocol Suite

The Internet protocol suite, according to WikipediA, is the conceptual model and set of communications protocols used in the Internet and similar computer networks. It is commonly known as TCP/IP because the foundational protocols in the suite are the Transmission Control Protocol (TCP) and the Internet Protocol (IP). It is occasionally known as the Department of Defense (DoD) model because the development of the networking method was funded by the United States Department of Defense through DARPA.

The Internet protocol suite provides end-to-end data communication specifying how data should be packetized, addressed, transmitted, routed, and received. This functionality is organized into four abstraction layers, which classify all related protocols according to the scope of networking involved. From lowest to highest, the layers are the link layer, containing communication methods for data that remains within a single network segment (link); the internet layer, providing internetworking between independent networks; the transport layer, handling host-to-host communication; and the application layer, providing process-to-process data exchange for applications.

The technical standards underlying the Internet protocol suite and its constituent protocols are maintained by the Internet Engineering Task Force (IETF). The Internet protocol suite predates the OSI model, a more comprehensive reference framework for general networking systems.

Internet Protocol suite (IP suite), according, is the standard network model and communication protocol stack used on the Internet and on most other computer networks. While other networking models exist, the IP suite is overwhelmingly the global standard for computer-to-computer communication.

The IP suite follows a client/server model, in which multiple client programs share the services of a common server program. Protocols in the suite define end-to-end data handling methods for everything from packetizing, addressing and routing to receiving. Broken down into layers the IPS includes the link layer, the internet layer, the transport layer, application layer and the physical layer. Each layer contains a number of protocols for communications. The suite is sometimes just called TCP/IP, because those are the predominant protocols in the model and were the first ones used. However, the IP suite involves many other protocols.

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VoIP - Voice Over Internet Protocol

What is VoIP - Voice Over Internet Protocol?

According to, VoIP is an acronym for Voice Over Internet Protocol, or in more common terms phone service over the Internet. If you have a reasonable quality Internet connection you can get phone service delivered through your Internet connection instead of from your local phone company.

Some people use VOIP in addition to their traditional phone service, since VOIP service providers usually offer lower rates than traditional phone companies, but sometimes doesn’t offer 911 service, phone directory listings, 411 service, or other common phone services. While many VoIP providers offer these services, consistent industry-wide means of offering these are still developing.

Voice over Internet Protocol (VoIP), also called IP telephony, according to WikipediA, is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).

Early providers of voice-over-IP services offered business models and technical solutions that mirrored the architecture of the legacy telephone network. Second-generation providers, such as Skype, built closed networks for private user bases, offering the benefit of free calls and convenience while potentially charging for access to other communication networks, such as the PSTN. This limited the freedom of users to mix-and-match third-party hardware and software. Third-generation providers, such as Google Talk, adopted the concept of federated VoIP - which is a departure from the architecture of the legacy networks. These solutions typically allow dynamic interconnection between users on any two domains on the Internet when a user wishes to place a call.

In addition to VoIP phones, VoIP is also available on many personal computers and other Internet access devices. Calls and SMS text messages may be sent over mobile data or Wi-Fi. VoIP allows modern communications technologies (including telephones, smartphones, voice and video conferencing, email, and presence detection) to be consolidated using a single unified communications system.

ManageEngine OpUtils IP Address Management

OpUtils IP Address Management Software

OpUtils IP Address Management (IPAM) provides a centralized management of the IP address space, including IPv4 and IPv6 Address Management. IP manager software helps network engineers to identify whether an IP Address is currently available or not, in an enterprise network. The IP Address Manager tool periodically scans a subnet and provides the availability status of IP addresses in that subnet. One can check whether a particular IP is reserved or available using IP manager tool. The tool accepts multiple subnet inputs, which helps in scanning the entire network to get the status of the IP addresses.

Why OpUtils for IP Address monitor?

OpUtils IPAM helps you keeping track of all your IP Addresses. IP manager software allows you to define a hierarchy to add all your subnets based on their usage/location and then scan them to get the current status of each of the IP Addresses.

The IP manager tool main features include:

  • Active Directory Integration to check whether the IP pertains to a computer object;
  • Role Based Administration to exercise more control by creating users with Administrator or Technician Roles;
  • Hierarchial Tree View to create an hierarchical representation of their network;
  • IP History and audit to track and audit the changes made using IP Address Manager;
  • End-to-End IP details to scan the subnets to get the details of the IP Addresses;
  • Discovering and adding subnets to discover and add subnets for monitoring and managing;
  • IP Address Management Reports to provide the IP Availability Report of the network;
  • DHCP server monitoring to support Microsoft DHCP Servers;
  • Flexible Scanning to scan manually or can be scheduled to run at specified intervals;
  • Powerful Search to use the global search option to get the details of an IP Address;
  • Alert Notification to notify the administrators about the change in state of an IP Address by email;
  • Network tools for getting the current availability, DNS name, etc., of any IP Address.

More Info & Download

IP address management

What is IPAM (IP Address Management)?

IP address management (IPAM), according to WikipediA, is a methodology implemented in computer software for planning and managing the assignment and use of IP addresses and closely related resources of a computer network. It does not typically provide Domain Name System (DNS) and Dynamic Host Configuration Protocol (DHCP) services, but manages information for these components.

Additional functionality, such as controlling reservations in DHCP and other data aggregation and reporting capabilities, is also common. Data tracked by an IPAM system may include information such as IP addresses in use, and the associated devices and users. Centralized collection of this information may support troubleshooting and abuse investigations.

IPAM tools are increasingly important as new IPv6 networks are deployed with large address pools of 128-bit hexadecimal numbers and new subnetting techniques.

IPAM (IP Address Management), according to Infoblox, is the administration of DNS and DHCP, which are the network services that assign and resolve IP addresses to machines in a TCP/IP network. Simply put, IPAM is a means of planning, tracking, and managing the Internet Protocol address space used in a network. Most commonly, tools such as DNS and DHCP are used in tandem to perform this task, though true IPAM will glue these services together so that each is aware of changes in the other (for instance DNS knowing of the IP address taken by a client via DHCP, and updating itself accordingly).

List of products

SolutionDatabase support
6connectMySQL, ElasticSearch
Address CommanderPostgreSQL, MySQL, Oracle
ApplianSys DNSBOXEmbedded PostgreSQL Database
BlueCat NetworksEmbedded PostgreSQL Database
BT Diamond IPMySQL, Oracle
Cisco Network RegistrarYes SQL
CollinsMySQL MariaDB
Device42Embedded PostgreSQL Database
EfficientIPEmbedded DDBMS
FusionLayer InfinityHybrid PostgreSQL & NoSQL
HaCiMySQL, PostgreSQL
InfobloxEmbedded real-time distributed database
IP-AdminMicrosoft SQL Server
IPplanPostgreSQL, MySQL, Oracle, Microsoft SQL Server
MAAS - Metal as a ServicePostgreSQL
Men & Mice Suiteinternal SQLite, Microsoft SQL Server
MicrosoftWindows Internal Database, Microsoft SQL Server
MorpheusPostgreSQL, MySQL, Oracle, Microsoft SQL Server
NetdotMySQL, PostgreSQL
NSoTMySQL, Oracle, PostgreSQL, SQLite
OpenNetAdminMySQL (via adodb)
Pandora FMS IPAM ext.MySQL
RackTablesMySQL, MariaDB
Route Inventory ManagementEmbedded database
SolarWinds IP Address ManagerMicrosoft SQL Server
VitalQIPSybase, Oracle

Free internet protocol version 6 (IPv6) certification at

Get started in minutes. Become an IPv6 guru. Layer 2 transport. IP transit. Dedicated server. Colocation.

About Hurricane Electric

Hurricane Electric operates its own global IPv4 and IPv6 network and is considered the largest IPv6 backbone in the world as measured by number of networks connected. Within its global network, Hurricane Electric is connected to over 200 major exchange points and exchanges traffic directly with more than 7,500 different networks. Employing a resilient fiber-optic topology, Hurricane Electric has no less than five redundant 100G paths crossing North America, five separate 100G paths between the U.S. and Europe, and 100G rings in Europe and Asia. Hurricane also has a ring around Africa, and a PoP in Australia. In addition to its vast global network, Hurricane Electric owns and operates two data centers in Fremont, California - including Hurricane Electric Fremont 2, its newest 200,000 square-foot facility. Hurricane Electric offers IPv4 and IPv6 transit solutions over the same connection. Connection speeds available include 100GE (100 gigabits/second), 40GE, 10GE, and gigabit ethernet.

Contacting Hurricane Electric

Hurricane Electric
760 Mission Court
Fremont, California, CA 94539

General Information: +1 510-580-4100 [email protected]
Tech Support: +1 510-580-4100 [email protected]
Sales: +1 510-580-4190 [email protected]
Billing: +1 510-580-4180 [email protected]
Fax: +1 510-580-4151

IPv6 certifications at

The Hurricane Electric IPv6 Certification Project will allow you to certify your ability to configure IPv6 and to validate your IPv6 server's configuration.

Through this test tool set you will be able to:

  • Prove that you have IPv6 connectivity
  • Prove that you have a working IPv6 web server
  • Prove that you have a working IPv6 email address
  • Prove that you have working forward IPv6 DNS
  • Prove that you have working reverse IPv6 DNS for your mail server
  • Prove that you have name servers with IPv6 addresses that can respond to queries via IPv6
  • Prove your knowledge of IPv6 technologies through quick and easy testing.

You will also demonstrate that you are familiar with IPv6 concepts such as:

  • the format of IPv6 addresses
  • AAAA records
  • reverse DNS for IPv6
  • the IPv6 localhost address
  • the IPv6 default route
  • the IPv6 documentation prefix
  • the IPv6 link local prefix
  • the IPv6 multicast prefix
  • how to do an IPv6 ping
  • how to do an IPv6 traceroute
  • common IPv6 prefix lengths such as /64, /48, /32
  • and more!

Users say that the Hurricane Electric Free IPv6 certification service is both entertaining and educational.

Hurricane Electric aim to provide you with something to do after your first IPv6 ping.

More info & Register

NOTES. Registering will give you access to the following services:


If you have already registered for one of the sites, you may login with those credentials without registering again.