COMpact 4000

Semi-modular, wall-mounted compact ICT system (VoIP, ISDN, POTS); 10 channels to service provider and 16 subscribers max., 2 …

Suggested for up to 16 VoIP subscribers

Up to 12 ISDN subscribers

8 analogue subscribers

Up to 12 VoIP channels simultaneously, can be configured for external (internet telephony), internal or flexible use

System telephony with digital telephones from the COMfortel® series

Your advantages in detail

The COMpact 4000 seamlessly adapts to any operating environment and takes care of full network integration in next to no time at all. Its setup assistant helps you enter all basic settings and get the system ready for operation within minutes.

Based on a basic setup which already meets most of the connection and equipment requirements the system can be expanded with two plug-in modules for universal ISDN and analogue trunk lines. And there is a host of convenient functions, such as integrated voicemail and fax, CTI and UC capabilities, full VoIP integration and interfaces for house automation systems – everything that makes up modern telecommunications is on board.

If you are looking for a modern, small communication centre for all traditional and IP-based connections, you are perfectly served with the COMpact 4000.

Compatible products

Features & technical data

Everything you need to know about our products comes now. Scroll down for more information.

System functions

  • System profiles (10 configurations max.) switchable by internal clock or manually by phone (internal and external)
  • Bank holiday table for automatic switching of system profiles or wake-up calls
  • Trunk line authorisations for reduction of costs and for multi-company operation
  • Automatic system-wide exchange line request
  • Direct line access
  • Call through for ISDN and VoIP trunk lines
  • Waiting field for up to 10 simultaneous incoming calls
  • Announcement before answering unconditional / on busy, 10 announcements can be stored
  • Music on Hold with insertable announcement, loadable WAV file
  • ISDN features such as CLIP, CW, AOC, CF, CCBS
  • Least Cost Routing Soft-LCR for VoIP, ISDN and POTS
  • Emergency calls, 10 numbers with special rights and priority
  • Call barring / exception lists, 10 each for incoming and outgoing calls
  • Protection against attacks with blocking, black lists, monitoring
  • Call data management with max. 18,000 records
  • Project assignment of calls
  • Group caller lists
  • Group functions with intelligent ringing schemes (ACD feature for Call Centres)
  • Flexible rework time for Call Centres
  • Parallel call, simultaneous calling of a 2nd target and priority
  • Busy-on-busy for internal and external calls, dynamical applicable for logged-in Call Agents
  • Call brokering, three-party conference internal / via exchange line / via 2nd call channel
  • Open query
  • Pick-up specific/global
  • Pick-up with pre-check
  • Boss-secretary function
  • Call diversion, follow me internal, cascadable
  • Door terminal to exchange line calls (pharmacy function)
  • Voicemail and fax functions
  • Call take-over (e.g. from integrated answering machine)
  • Speaker announcement (Intercom) to system telephones (single user and groups)
  • Software interfaces
  • Supporting CTI basic functions (the most important phone functions like initiating a call, accepting a call, ending a call, holding a call, toggling calls, call transfer, starting a three party conference, pick up)

SIP convenience features for standard SIP phones

  • SIP-BLF, Busy Lamp Field acc. to RFC 4235
  • Pick-up pre-check
  • SIP-MWI (Message Waiting Indication), monitoring of the central voicemail and fax boxes acc. to RFC 3842
  • SIP text messages acc. to RFC 3428
  • Auto provisioning and status LEDs

Central address books

  • 2,000 contacts incl. photo, addresses and phone numbers
  • Separate address books for departments and multi-company operation
  • Comfortable operation via COMfortel system phones
  • Security access levels for administrator and user
  • Address book provisioning via LDAP
  • Usage of Google Contacts
  • Import of VCF and CSV files

Building and home automation

  • Max. 24 actuators, e.g. a/b Switching Modules or via http with IP switching relays
  • KNX/EIB integration via IP, e.g. with GIRA HomeServer
  • Time or key controlled operation of heating systems, aircondition lighting or blinds
  • Full integration of VoIP and analogue door intercom systems
  • Support for IP video intercom systems

VoIP telephony

  • 4 VoIP channels (external/internal) included, expansion to 12 VoIP channels possible
  • Dynamic internal/external VoIP channels
  • Fax over IP external (T.38 acc. ITU-T)
  • Excellent sound quality due to optimised echo cancellation and wideband audio with G.722
  • Remote extensions and mobile VoIP clients integration
  • MSNs in SIP-Trunk simultaneously
  • Call forwarding on busy (CFB), no reply (CFNR), unconditional (CFU) at carrier trunk, configuration dependent
  • Encrypted signalling (SIPS) and data transmission (SRTP)
  • Transfer of customer-specific calling number information with outgoing calls (CLIP no screening)
  • Individual gateways for each provider

Voicemail and fax

  • 1 voicemail channel and 1 voicemail box included
  • Expansion possible to a maximum of 4/0 or 3/1 channels for voicemail/fax with 20 boxes each
  • Fax sending via the network (Windows 7/8/10 and macOS)
  • Storage of the voice and fax messages on USB memory (not included)
  • Recording capacity (per 1 GByte storage): approx. 8.5 hours voice messages incl. announcements or approx. 3,500 fax pages
  • Call acceptance and individual announcements depending on calling number, time and call type
  • Comfortable operation via corded COMfortel system phones
  • Substitute function
  • Message and fax forwarding via e-mail
  • Remote access of the voicemail boxes incl. voice guidance
  • Active and passive fax switch at analogue trunk lines

UCC functions

  • Softphone-functions for Windows, Android und iOS
  • Call setup and ending via the PC, incl. Outlook plug-in
  • Presence management with automatic status detection
  • Instant messaging for a better sharing of information
  • Contact data for local users and out of external data bases
  • Screen sharing for convinient cooperation
  • „Federation" as networking concept between external sites and companies
  • Platform independent (Windows, Mac, iOS, Android)

Supplementary smartphone apps

  • PBX Manager with switching of call forwardings log-in/-out in groups, retrieving of messages
  • COMfortel Mobile Business – seamless integration in iOS and Android, signalling of the business number, full flexibility, always reachable

Software interfaces

  • Recalling call data via SFTP
  • LAN TAPI (4 clients in scope of delivery)
  • Online name search (reverse search), adaptable
  • PBX Control API, e.g. retrieve caller lists, call forwarding ON/OFF, configuration switching, sending of fax/voicemail, switching relays, alarm status (start, acknowledgment, timeout), hotel (room status, call list, wake-up call) 

Installation and maintenance

  • Administration via web interface, secure access via https
  • System access local via Ethernet and remote via Internet
  • System software update via local or remote PC upload
  • Central configuration of IP telephones (security by using certificates)
  • Auto provisioning for telephones of other brands
  • Easy configuration with COMfortel IP Editor
  • Selectable authorisation levels, password protected
  • IPv6 support

Unlockable options

  • Expansion from 4 to 8 VoIP channels, thereof up to 4/0 or 3/1 channels for voicemail/fax, incl. 20 voicemail and fax boxes
  • Expansion from 8 to 12 VoIP channels
  • Auto Attendant
  • LAN-TAPI (for all subscribers)
  • PBX Call Assist
  • SIP comfort package brand plus included auto provisioning for standard SIP phones

Exchange lines 1



VoIP channels (SIP acc. RFC 3261), point-to-multipoint/point-to-point connection (SIP trunking) 2

0 - 4 10

S0 ports, point-to-multipoint/point-to-point connection (PTMP/PTP, Euro-ISDN, DSS-1), switchable to internal S0/UP0

0 - 2 3

Analogue trunk line (tone dialling, CLIP capable)

0 min. | 4 max.

VoIP codecs trunk line

G.711, G.722, G.726, G.729, iLBC

Subscriber ports 1



VoIP subscribers

0 min. | 16 max.

VoIP channels (SIP acc. RFC 3261) 1

0 - 4 12

VoIP codecs internal

G.711, G.722, G.726, G.729, iLBC

Switchable S0/UP0 ports , point-to-multipoint connection (PTMP, Euro-ISDN, DSS-1) 1

0 - 2 6

Range of the internal S0/UP0 ports

approx. 150 m / 1,000 m at Ø 0.6 mm

Analogue ports, symmetrical, pulse/tone dialling, CLIP/CNIP capable


Range of the analogue ports

2 x 50 Ω, approx. 790 m at Ø 0.6 mm

Voicemail and fax system 1



Voicemail channels 2

1 4

Fax channels

0 min. | 1 max.

Voicemail boxes / fax boxes

1 / 0 20 / 20

Fax standard

T.30/T.38 acc. ITU-T

Active and passive fax switch for analogue trunk


Door and relay connections



Door intercom systems analogue (a/b) or VoIP (SIP)


Door bell inputs

depending on the analogue/VoIP door intercom system

Door opener relay

depending on the analogue/VoIP door intercom system

Switching relays (door opener, staircase lighting, IP switch relay, a/b Switching Modul)


Additional connections 1



Ethernet port 10/100 Base-T (10/100 MBit/s, twisted pair)


USB host V2.0 for printer and memory connection


Analogue audio output for announcements (e.g. a/b Audiobox)


Module slots


Technical data



Operating voltage

230 V ±10 %, 50 Hz

Power consumption

3.2 W 55 W


plastic, chassis with cover

Dimensions (w x h x d)

334 mm x 331 mm x 94.5 mm

Weight (w/o modules)

approx. 1,600 g



Supported operating systems

Windows 7/8/10, macOS, Linux

  • 1 Possibly depending on the configuration of the ICT system
  • 2 VoIP channels can be configured individually internally/externally or as voicemail/fax channels

Delivery Scope

  • Basic unit
  • Ethernet cable
  • ISDN cable
  • Installation Instructions and Setup Guide


UP0/S0 Adapter

Converts from 2-core UP0 to 4-core S0


Adapter for connecting a loudspeaker system to an analogue extension connection of an ICT system

a/b Switching Module

Switching module for door bell, door opener and light system control via 2-wire analogue line, for TFS-Dialog 200/300/400 and TFS-Universal plus


PBX Manager

Application to control and configure a FONtevo ICT system

COMfortel® Mobile Business

FMC application for mobile use of your business calling number

More security for your device

Benefit from comprehensive protection. We offer you various possibilities to take advantage of our guarantees. So you are always on the safe side, no matter what your needs are. As a standard, you receive a 24-month warranty from us, through a specialist dealer even 36 months. With an additional fee-based warranty extension, you can extend your warranty to a maximum of 60 months. Please note that the warranty extension by a further 24 months can only be redeemed within the first 6 months after purchase of this product described here.

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Best Practice

Agencies and law firms

It might be surprising to many people, but callbacks and telephone consultations make up a large proportion of our work as tax consultants. When looking for a new PBX, I settled on a COMpact 4000 from FONtevo – it covers everything we could possibly have imagined: we wanted to keep the telephone …

Patrick B. // Independent Auditor and Tax Consultant

Read more

Agencies and law firms

„Technology that quickly pays for itself for insurance and financial service providers“

> Read more

Agriculture and forestry

„Productive solutions for agriculture and forestry“

> Read more

Family and career

„The solution for juggling work and family life!“

> Read more

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