COMpact 4000

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

Features & technical data

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System functions

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

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 functionality for Windows, Android and 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), 4 included
  • 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 telephone 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

Datasheet download


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Satisfied Customers

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

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Family and career

„The solution for juggling work and family life!“

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Agriculture and forestry

„Productive solutions for agriculture and forestry“

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Agencies and law firms

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

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