Kerio Technologies
  • Latest version:

    2.3.5 Patch 1
    Released on:

    Apr 21 2015

    Prior to installation, please read the Quick Start Guide.

    Product Updates for Existing Users

    Bootable CD - ISO Image

    VMware Virtual Appliance (VMX)

    VMware Virtual Appliance (OVF)

    Upgrade Image

    Provisioning Developer Doc (ZIP)

    Rescue flash image

    USB script for factory reset
    USB script for password reset

    Interested in joining the beta testing program? Sign up today.

  • Latest version:

    2.3.5 Patch 1
    Released on:

    Apr 21 2015

    Prior to installation, please read the Quick Start Guide.

    System Requirements

    Minimum Hardware

    Intel Celeron 1 GHz or equivalent
    512 MB RAM
    8 GB hard drive
    Ethernet card

    Recommended Hardware

    Intel Core Duo 2 GHz or equivalent
    2 GB of memory
    16+ GB hard drive
    Ethernet card

    Virtual Appliance

    Intel Core Duo 1,5 GHz or equivalent
    512 MB RAM assigned to the virtual machine
    8 GB HDD space assigned for OS, product, configuration, and logs
    1 assigned virtual network adapter

    VMWare Hypervisor

    VMware Workstation 9 or 10
    VMware Player/Player Plus 5 or 6
    VMware ESX 5.1 or 5.5
    VMware ESXi 5.1 or 5.5

    Supported Phone Cards*

    Digital (1-port T1/E1): Digium TE121, Digium TE122, Digium TE131, Digium TE 132, Digium TE133, Digium TE 134
    Digital EuroISDN: Digium B410P (4-port)
    Analog: Digium TDM410 (4-port analog FXO), Digium A4 Series (4 port analog FXO)

    * Digium hardware cards are available through Digium reseller network. For Kerio Operator Box 3xxx, some Digium cards can be ordered as an integrated option at the time of purchase only.

    Multi-language Support

    Administration Interface

    English, Czech, German, French, Italian, Russian

    MyPhone Interface

    English, Czech, German, Spanish, French, Italian, Russian, Croatian, Hungarian, Japanese, Dutch, Polish, Brazilian Portuguese, Swedish, Chinese

    Preloaded Voice-prompt Sets

    American English, British English, Czech, German


    7940, 7941, 7960, 7961, 7940G, 7942G, 7960G, 7970

    Cisco / Linksys

    PAP2T, SPA1001, SPA112, SPA122, SPA901, SPA921, SPA922, SPA941, SPA942, SPA962, SPA301-G2, SPA303-G2, SPA501G, SPA502G, SPA504G, SPA508G, SPA509G, SPA512G, SPA514G, SPA525G, SPA525G2, SPA3102, SPA8000


    300, 320, 360, 370, 710, 715, 720, 760, 820, 821, 870, M3, M9, Meeting Point, PA1


    IP321, IP331, IP335, IP450, IP550, IP560, IP650, IP670, VVX300, VVX310, VVX400, VVX410, VVX500, VVX600, VVX1500, IP5000, IP6000, IP7000
    Supported firmware: version 3.3.0 and above


    T18P, T19P, T20P, T21P, T22P, T26P, T28P, T32G, T38G, T41P, T42G, T46G, T48G, W52P
    Supported firmware: version v70 and above


    GXP1100, GXP1105, GXP1160, GXP1165, GXP1400, GXP1405, GXP1450, GXP2100, GXP2110, GXP2120, GXP2124v2, GXP2130, GXP2140, GXP2160, GXP2200, GXV3140, GXV3175, GXV3175v2, GXV3240, GXV3275

    Mitel / Aastra

    6730i, 6731i, 6735i, 6737i, 6739i, 6753i, 6755i, 6757i, 6757i CT, 6863i, 6865i, 6867i, 6868i, 9143i, 9480i, 9480i CT


    Kerio Operator Box 1220

    Kerio Operator Box 3230


    Concurrent calls
    Concurrent recorded calls
    Unlimited. Number of participants must be smaller than the number of concurrent calls
    Voicemail storage
    up to 28 GB
    up to 28 GB

    Hardware (only available in US, Canada, APAC and EU)

    Desktop - fan-less-design
    1U rack mount unit
    Dimensions (in/mm)
    9.8 x 7.6 x 1.6in / 250 x 194 x 40mm
    16.8 x 14.4 x 1.7in / 426 x 365 x 44mm
    Weight (lb/kg)
    4.4lb / 2kg
    15lb / 6.8kg
    6 x 10/100/1000 RJ-45
    8 x 10/100/1000 RJ-45
    Other ports
    2 x USB 2.0, 1 x RJ-45 console port
    2 x USB 2.0, 1 x RJ-45 console port
    Power input
    Hard disc drive
    32 GB SSD
    32 GB SSD
    4 GB
    4 GB DDR3 1333 SDRAM
    Intel Atom Dual Core 1.8 Ghz
    Intel Core i3-2120 3.3 Ghz

    Hardware Options

    PRI - T1/E1 (24/30 concurrent calls)
    Digium TE131F 1-port card
    Warranty options
    Standard 1-year warranty
    Standard 1-year warranty
  • Tested SIP Providers

    To test Kerio Operator you will need a trial SIP trunk. We have tested Kerio Operator with a variety of SIP providers around the world and prepared knowledge base articles about how to configure Kerio Operator to work with them. Choose any of the tested SIP providers and request a trial SIP trunk. If you have successfully tested Kerio Operator with a SIP provider not listed on this page, feel free to let us know and we will update the list.


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    sipgate GmbH - Integration Guide | Website

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    ISPhone - Integration Guide | Website

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    Canada (CAN) - Integration Guide | Website

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    VoipVoice - Integration Guide | Website

    ActiveNetwork s.p.a - Integration Guide | Website

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    PlusTEL ApS - Integration Guide | Website

    Czech Republic - Integration Guide | Website

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  • Latest version:

    2.3.5 Patch 1
    Released on:

    Apr 21 2015

    Please read the Release History.

    Introducing Operator 2.3

    Click to Call Integration with Kerio Connect

    Users of Kerio Connect client can click a contact's phone number to initiate a call from Kerio Operator. By clicking a number, you can select the registered phone/device to dial from. The selected phone/device will ring. Answer the call and Kerio Operator will place the outbound call to the dialed number.

    Read about the Click to Call in our Knowledge Base: Configuring Click to Call in Kerio Connect client

    Click to Call for Kerio Operator Plugin for Chrome and Firefox

    Click to Call for Kerio Operator plugin allows you to initiate a call from Kerio Operator using Chrome and Firefox browsers.

    Read about the Click to Call for Kerio Operator in our Knowledge Base: Using Click to Call for Kerio Operator plugin for Chrome and Firefox.

    Automatic Provisioning Support for Aastra Phones

    Kerio Operator 2.3 extends provisioning support with several Aastra models.

    Call Monitoring

    Allows users with an access code to participate in any active call by dialing a special prefix, followed by an extension. After joining the call, the user can dial 4, 5, or 6 to change their level of participation (muted, muted only to remote party, unmuted). The default prefix for call monitoring is *6, and is configured in the PBX services.

    Read about call monitoring in our Knowledge Base: Using a call monitoring

    Provisioning Tools

    Kerio Operator includes tools for phones administration:

    • Displaying the phone web interface

    • Opening a packet sniffer for a communication between the phone and Kerio Operator

    • Pinging IP address of the phone.

    Read about provisioning tools in our Knowledge Base: Using provisioning tools

    Smaller features added in Kerio Operator 2.3.2

    Kerio Operator 2.3.2 includes the following improvements:

    • The Administration Interface now includes Spanish localization.

    • It is now possible to switch the day/night mode of the PBX manually. The day/night mode switch can be tested in auto attendant scripts instead of predefined time intervals.

    • Custom gateway and DNS addresses can be configured in Operator's built-in DHCP server.

    • We have added an optional automatic hourly update of the public IP address.

    • Calls arriving via an external interface (usually a link to another PBX) can be now allowed to dial out using another interface on the same Operator machine.

    Smaller features added in Kerio Operator 2.3.3

    In addition to several bug fixes and other improvements, Kerio Operator 2.3.3 comes with the following smaller new features:

    • Implemented blacklisting for incoming calls.

    • Support for encrypted calls with Cisco/Linksys SPA phones.

    • Added the Event Log (shows for example the result of fax transmissions).

    • Implemented optional e-mail notifications when an interface changes its state (up/down).

    • New optional columns in Call History: IP addresses, user agent string, codec, QoS, interface used.

    • Refactored the Advanced Forwarding dialog to make it more intuitive.

    Smaller features added in Kerio Operator 2.3.4

    Kerio Operator 2.3.4 brings several bug fixes and the following smaller improvements:

    • Updated Asterisk to version 1.8.30 and DAHDI drivers to version

    • Added the fields Facility and Application to the configuration of external logging.

    • Added auto-provisioning support for Polycom VVX300, VVX310, VVX400, VVX410.

    • The voice mail system switches to user's preferred language after a user logs to his/her voice mail from someone else's extension.

    • Operator sends e-mail alerts if LDAP or voicemail integration connections fail.

    • The administration interface has a new tile for the Dashboard screen that displays the last lines of a chosen log.

    • The Change Log is shown in addition to Release Notes during upgrade.

    • Added an option to switch off the T.38 fax support (for situations when a SIP carrier does support T.38 but their support is not reliable and the good old G.711 codec has better results).

    Fixes in Kerio Operator 2.3.4 Patch 1

    • Updated the glibc library to fix the vulnerability CVE-2015-0235 (aka GHOST).

    • Prevent random corruption of sent faxes.

    Improvements and Fixes in Kerio Operator 2.3.5

    • Added automatic provisioning support for Grandstream GXP2200, GXV3175v2, GXV3240, GXV3275.

    • Added automatic provisioning support for Mitel phones 68xx.

    • Renamed the auto-provisioned Aastra phones to Mitel.

    • Fixed day/night mode switch messages in the Event log.

    • Fixed an issue in the built-in web server that might stop processing new requests after 497 days of uptime.

    • Fixed the timezone for Harare and several other countries.

    • Improved the resilience of the TFTP server to very high load.

    • Prevent Snom phones to fetch configuration from (and end in a frozen state).

    • Fixed dial patterns for Snom phones to allow dialing longer numbers that have a prefix that is the same as some local extension.

    • Increased the maximum number of extensions for Yealink SIP-T4x phones.

    • Fixed occasional disabling of users on LDAP failure.

    • Updated the Samepage logo.

    • Fixed the FTP connection test that might sometimes report a failure even for a correct configuration.

    • Fixed the Emergency Numbers configuration for call routes with an empty prefix.

    • Fixed downloading of very large call recording files.

    Fixes in Kerio Operator 2.3.5 Patch 1

    • Fixed a bug that could happen when exporting logs.

    • Fixed editing of extension numbers - the number length was sometimes limited to 10 digits.

    Changes in System Requirements

    • Support for Aastra phones added

    • Support for Yealink/Well W52P added

    • Support for VMware ESX 5.5 added

    • Support for Digium TE131 — 134 added

    • Support for Digium A4 Series added

    For more details, read Technical Specifications.


    If you use the Kerio Operator 2.3.0 trial version, the trial license expires after downgrade.

    Release history

    Kerio Operator Release History is available at

    Open Source Software Notice

    Kerio Operator includes open source software. The complete open source code packages of these components are available in Kerio Software Archive at

    Legal Notice

    snom® is a registered trademark of snom technology AG.

    Linksys® is a registered trademark of Cisco Systems, Inc.

    Cisco® is a registered trademark of Cisco Systems, Inc.

    Polycom® is a registered trademark of Polycom, Inc.

    Salesforce® and® are registered trademarks of, Inc.

    Grandstream® is a registered trademark of Grandstream Networks, Inc.

    Aastra® is a registered trademark of Aastra Technologies Limited.

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