Modern VoIP PBX, for which we have proceeded in the development of our experience and the experience of our customers. We are decided to not restrict our customers and therefore our offered PBX is already equipped with all the features and its variants differ only in the performance of the hardware. Using VoIP PBX saves the cost of infrastructure for which you already make do with a classical computer Ethernet networks. You do not need to build more and more telephone lines and pay a monthly fee for the physical connection to the network operator's PBX (eg. ISDN2, HTS ...).

PBX is also offered as a standalone software package that you install on your server / computer and buy a license only. If you interested, we can install it professionally on your hardware.

Answers for F.A.Q.



VoIPSUN PBX hardware variants

VoIPsun µPBX (micro PBX)

  • Micro PBX is designed for use in small businesses. Recommended number of simultaneous calls is 10. PBX is powered via the supplied micro USB 220V adapter has an internal ethernet port, 4 USB ports and an internal microSD card. PBX can be extended with any external USB storage. Advantage Micro PBX are its small size, very low power consumption and zero noise.


  • Server variant contains basically two integrated Ethernet ports option of a 3.5 or 2.5 internal disk drives, and even in RAID1 configuration. PBX can be equipped with one high profile PCIe card (E1, ISDN2)

VoIPsun Custom PBX

  • We are able to supply any hardware configuration according to customer needs (Servers from reputable manufacturers PC), or installed on hardware supplied by the client (new or refurbished)

VoIPSUN PBX software variant


  • Software VoIPsun PBX can be purchased separately as software licenses, the price of which is graded based on the number of simultaneous calls (number of lines or other channels is not limited trunk). Software can be installed on any hardware supported by the Linux operating system.

VoIPSUN PBX cloud variant

VoIPsun Cloud PBX

  •  Hosted Virtual PBX, which is located at a colocation center (server room). With this option you will never have to worry about hardware PBX.


  • SIP (Session Initiation Protocol) protocol support
  • TLS signalization encryption
  • SRTP voice encryption
  • support for ISDN2, ISDN30 connections
  • unlimited number of connected SIP phones and SIP trunks (limited only by the performance of the HW)
  • Call Detail Records (CDR)
  • tariffication tables (billing) with peak / offpeak definitions
  • multiple internal numbering plans
  • intelligent inbound and outbound routing
  • routing rules based on time
  • complex numbers manipulations
  • custom routing scripts
  • day / night mode
  • calendar (iCAL, CalDAV, MS Exchange 2003, MS Exchange 2007/2010)
  • backup outbound rules
  • IVR
  • Music On Hold
  • custom sound files
  • attendant and unattendant call transfer
  • DISA (Direct Inward System Access)
  • call parking
  • call forward - unconditional, unreacheble, no answer, busy or calendar based
  • mobility extension
  • conference rooms
  • voicemails
  • call recording
  • API interface for CRM integration
  • remote call pickup
  • line groups
  • multilines
  • callcentrum
  • CID lookup (display caller name based on the records in the database)
  • phonebook with click2dial
  • daily and monthly charge limit
  • multilingual web administration interface with a simple translation into other languages
  • multilingual user interface
  • automatic devices configuration (TFTP, FTP, HTTP provisioning)
  • virtual FAX2MAIL
  • SIP diagnostics
  • Graphical system status
  • OpenVPN client
  • firewall
  • NTP server
  • DHCP server
  • SSH access with root restriction





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