Improved DS200 Series with the new CPU IV is a new generation IP based solution that converges advanced IP skills with the reliability of TDM voice processing for SMB and CME. System supports & manages both data, video and voice traffic in one powerful platform.

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General Information

KAREL DS200 Series provide a flexible, reliable, convenient and cost-effective communication platform with rich, flexible range of features and solutions which meet the communication needs as well as the challenges of the corporate world.

KAREL DS200 Series are a state-of-art, modular system with the open system architectures and digital platforms. The DS200 Series interface with Analog, ISDN BRI, ISDN PRI, E&M, PLC, E1-R2, TWT, LB or VoIP Lines on the trunk side and Analog, ISDN, Digital, Wireless or IP Stations on the extension side.

The electronic and mechanical architectures of the DS200 Series are designed using the facilities of the latest technology to support a flexible communication platform.

A distributed processing structure is adapted, instead of a single processor to control all the functionality. High grade of reliability is assured by the on-line redundant processor which is ready to back-up the main processor and by the power network. The power network is designed to provide redundancy support to ensure persistant operation in case of any failure in the power system caused by external effects.


The modular architecture and the rich features of DS200 Series allow for flexibility in creating and modifying system configurations in accordance with the specific needs of a wide range of customers such as hotels, hospitals, manufacturing plants, commercial enterprises and public offices.

The DS200 Series comes in three different models. The DS200 model has capacity of 1344 TDM Ports + 750 IP Ports. The DS200S and DS200M, with maximum capacities of 244 TDM + 750 IP Ports and 144 TDM + 750 IP Ports respectively, are cost effective alternatives for organizations that need the rich features but not high capacities offered by DS200 Series.

In addition to this wide range of interfaces used for the network connections, a large set of extension services such as metering pulse generation, automated line check, Caller ID display and Caller ID generation are provided in this configuration.

The compact and flexible structure of the DS200 model allows for cabinet or wall mounting applications. The cabinets of the DS200 are designed for the most efficient installation and maintenance processes. The mechanical structure for the construction of the Main Distribution Frame is situated at the back;while space is reserved for the batteries at the bottom. The back and side doors may be opened for easy installation and servicing, just as the in-cabinet illumination is implemented for the same purpose. Latchable wheels allow facile displacement of the system whenever necessary. Finally, the glass front door allows easy monitoring of the system status.


One of the most powerful properties of the DS200 Series is networking. Any number of DS200 Series systems can form a telephone system network and act as a single, uniform system. This can be done by connecting to each other via star, chain or any combination of the both, thanks to the intercorporated QSIG support. Within such a network, uniform or non-uniform numbering plans can be used so that an extension of any individual PABX system can directly call the other party that is connected to another system in the network.

Widely and frequently used PABX facilities such as calling line identification, alternative routing, routing authorizations, routing restrictions, least cost routing, call forwarding and call transfer are supported within the entire network.

In addition to the software flexibility in networking applications, DS200 Series systems offer a wide range of hardware interfaces such as Analog, E&M, TWT, Digital ISDN BRI, ISDN PRI, R2 and VoIP Interfaces, which can be used together and in any combination within a single DS200 Series system.

IP Telephony

IP Telephony provides a way to extend communication to employees in their workspaces, whether they are in main campus locations, at branch offices, working remotely or mobile.

DS200 supports SIP signalling protocol for a wide range of devices including :

  • Standard SIP Phones
  • WiFi SIP Phones
  • Proprietary SIP Phones
  • IP Dect Phones
  • SIP Enabled IP Trunks
  • Other SIP Devices using RFC.3261, RFC.3264, RFC.3310, RFC.2327 and RFC.4028.

Peer-to-peer communication-

DS200 uses less system resources in the calls between IP Extensions. This is now possible through P2P (Peer-to-peer) Communication between IP Ports.

VoIP Trunk Applications-

KAREL DS200 Series systems offer a cost-effective yet efficient solution to link enterprises with distant offices or branches.

Especially for the enterprises which have wide area networks with leased line or frame relay connections, DS200 Series Exchanges are the superb solutions for fulfilling your communication needs, without disturbing the data transmission over the existing network, without the necessity of any other interfaces causing additional costs.

DS200 Series IP Enabled Exchanges puts an end to the ncessity to use any other router interfaces such as FXO, FXS, ISDN BRI, ISDN PRI and E&M as well as the capacity limits that are due to these interfaces.

Supported Prorocols-

DS200 supports H.323 and SIP Protocols at trunk (line) interface whereas SIP is the protocol that is supported at the extension interface.

Supported Codecs-

You will have many codecs supported with DS200. If you have MGWI in your system, then you will have support for G.711, G.729 and G.729AB.If you have MGWII installed in your DS200, than you will have G.711, G.729, G.729AB, iLBC, T.38 and G.723.


DS200 respects your security and provides secure conversation methods through sRTP (Secure Real-Time Transfer Protocol) and SIPs (SIPSecure) along with TLS (Transport Layer Security).

DTMF Transmission-

DS200 supports both In-Band (G.711 & DTMF Relay) and Out-of-Band (SIP INFO & RFC.2833) methods for DTMF transmission.

SIP Network Elements-

The new CPUIV provides you to have benefits of DHCP feature. If you enable connection to DHCP server, you do not need to assign IP adress manually to the CPU card.

DNS feature is to be used in the new CPU of DS200. Different DNS adresses can be defined for the ethernet ports on the new CPU.

Now the new CPU of DS200 comes with an Integrated Firewall that protects the system from malicious threats. By this way, system does not allow access of unauthorized elements.

DS200 offers STUN support for NAT Traversal. With the help of STUN server residing at the public side of the NAT, the PABX connects its users to unknown public network ans also lets them receive calls from public network. NAT Traversal feature to be enabled to connect to the WAN via a router.

SIP Algorithms for Voice Quality-

Now DS200 is equipped with Dynamic Jitter Buffer (DJB) and Package Loss Concealment (PLC). DS200 supports Advanced Echo Canceller as well and thus echo is not a problem anymore for your system.

With the help of Voice Activity Detection (VAD), silent periods are not sent to the network, thus bandwith is protected. This feature can be supported by the codec G.729A and must be used at both sides of the connection.

Automatic Gain Control (AGC) checks the emitted voice signal and raises or lowers the volume of the signal if it is respectively weak or strong.

DS200 offers you ToS and DiffServ as QoS abilities. By the use of these abilities, DS200 can record & monitor QoS parameters and use QoS data for finding alternative routes.

Oversubscription might cause declines in Bandwith thereby the decline in voice quality. By the help of Call Admission Control, DS200 does not allow subscription above the defined limit.

The new CPU provides Session Timer to keep an effective call operation. Session time is a method to check the continuity of the calls.


General Features for the use of TDM Extensions

  • Account Coded Call
  • Answering an Incoming Call
  • Answering Second Call
  • Background Music
  • Busy Call Pick Up
  • Busy Extension Signalling
  • Call Back
  • Call Hold
  • Call Park
  • Call Park – For ISDN BRI/Digital Extensions
  • Call Record Listing
  • Call Record Listing of a Specific Extension
  • Call Transfer
  • Calling from Common Pool
  • Calling from Private Pool
  • Camp On
  • Changing Forced Account Code Password
  • Changing Hotel Room Usage Status
  • Changing Password
  • Check-in/Check-out
  • CLIR
  • Common Pool Auto-dial
  • Common Pool Entry
  • Conference
  • Date Setting
  • Deciding Talking Extensions in Multiple Conference
  • Deleting a Record from the Call Record Listing
  • Discarding Third Party After Intrusion
  • Do Not Disturb
  • Door Opener
  • Erasing the Entire Messages
  • Executive-Secretary Service
  • Extension Physical Address Query
  • Follow Me
  • Follow Me Busy
  • Follow Me No Answer
  • Follow Me Secretary Mode
  • Forced Account Coded Call
  • Group Call Pick Up
  • Group External Call Pick Up
  • Group Hotel Room Query
  • Group Wake-Up Service
  • Handling Multiple Conference Participants
  • Headset User
  • Hot Line
  • Hotel Room Cleanness Status Notification
  • Hotel Room Query
  • Internal Call
  • Intrusion
  • Last Number Auto-dial
  • Last Number Redial
  • Leaving a Message to an Extension
  • Leaving Message by the Help of Operator
  • Leaving Message to an Extension through the DISA Line
  • Line Call
  • Line Drop
  • Line Flash
  • Line Transfer to a Parked Call
  • Line Transfer to an Extension
  • Line Transfer to Extension on Hold
  • Line Voice Level Control
  • Line-Line Connection
  • Listening to All Messages Remotely
  • Listening to Entire Messages
  • Listening to New Messages
  • Listening to New Messages Remotely
  • Listening to the Messages through the DISA Line
  • Malicious Call Identification
  • Marked Call
  • Meet Me Service
  • Message Waiting on the Operator
  • Minibar Account
  • Multiple Conference
  • Multiple Conference – One Way Speech
  • Night Guard Code
  • Night Mode
  • Parallel Ringing / Tone on Busy
  • Password Define
  • Password Dialing
  • Password-Protected Line Access
  • PBX Group Log-In / Log-Out
  • Permanent Absent Message
  • Permanent Reminder Service with Message
  • Phone Lock Level
  • PLC / E&M Line Intrusion
  • Private Pool Auto-dial
  • Private Pool Entry
  • Recording Conversation
  • Reminder Service
  • Reminder Service with Message
  • Remote Follow Me
  • Remote Forced Account Coded Call
  • Remote Line Access
  • Resetting the Call Record Counter
  • Restoring the System Parameters
  • Retrieving a Call Parked through Another Phone
  • Retrieving a Call Parked through One\’s Own Phone
  • Retrieving a Parked Line
  • Ring Test
  • Room Monitoring Service
  • Selective Call Pick Up
  • Selective Line Access
  • Selective Line Transfer to Extension on Hold
  • Serial Transfer
  • Serial Transfer – For ISDN BRI/Digital Extensions
  • Telephone Lock
  • Temporary Absent Message
  • Time Setting
  • Total Cost Listing
  • Transmitting Ring Signal to Local-Battery Telephones
  • Wake-Up Service

General Features for the use of TDM Extensions

  • CLIP (Calling Line Identification Presentation) > Supported by the EX200 (8T0/0) card
  • CLIR (Calling Line Identification Restriction) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • COLP (Connected Line Identification Presentation) > Supported by the EX200 (8T0/0) card
  • COLR (Connected Line Identification Restriction) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • AOC (Advice of Charge) > Supported by the EX200 (8T0/0) card
  • CH (Call Hold) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • CW (Call Waiting) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • CF (Call Forwarding, Unconditional / No reply / Busy) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • CCBS (Call Completion on Busy Subscriber) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • CCNR (Call Completion on No Reply) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • 3PTY (Three Party Conference) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • TP (Terminal Portability) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • MSN (Multiple subscriber number)
  • DDI (Direct dialing in)
  • ECT (Explicit call transfer) > Supported by the EX200 (0/S0) card
  • CONF (Conference) > Supported by the EX200 (0/S0) card + ST26/ST30/NT30D Digital telephone
  • UUS (User to user signaling) > Supported by the EX200 (0/S0) card +ST26/ST30/NT30D Digital telephone



IP Phones with BLF Feature, Softphones and KAREL Digital Phones & DSS Modules have the ability to inform you about the status of the other extensions or lines. You will be notified about the availability of the extensions through the corresponding LED activity. Additionally if you have a SoftPhone then you might have all supported indications such as Online, Offline, Ringing, Busy, Away and Idle. You may also add messages just next to your status icon.

Instant Messaging

SIP Extensions of DS200 can send and receives messages between each others instantly. You may make use of this feature through IP Desktop Phones and SoftPhones. The protocol has been built to provide opportunity to see messages even if you were offline at the time the message was sent. As a storage for the offline messages, memory of 500 Kilobytes has been made available. Finally if you have a softphone, then you may start chatting as you do in commonly used messenger softwares.

Integrated Auto-Attendant

The new CPUIV comes with an onboard AA Module. The AA Messages which were previously stored in EVM200 Card only are now in CF Memory with a capacity of 4 Channels. Thanks to CF memory structure, you may easily drag and drop your AA Files from your computer to CF. You are free to upload wav file of any size into the memory.

For System Messages, Voice Mail and larger channel and storage capacity EVM200 must be preferred.

Enhanced Phonebook

With the help of the LDAP Server in the new CPUIV, you may now reach to a remote phonebook, which may be a phonebook out of your central office, scroll through it and search people by their names.

Additionally you may use the Local and Central Phonebook in your system as well. The users of the new Operator Console, NT30D, are now allowed to use Dial by Name feature.

Internal Music

If you would like the calling parties listen to a music while they are waiting, you may select a music file which is in wav format and upload it to CF.

Alarm Software

You may view the status of the DS200 systems installed in different locations through this interface. You may even upload different maps to the software and place your DS200 systems on the map.

In case of an alarm situation, the Software will warn you with both visual and acoustic warnings. Alternatively, you may register your e-mail adress to receive alarm notifications through e-mail.

You may edit & revise the Alarm messages as to your needs.


Integrated SNMP provides central management over multisite exchanges.

SNMP Agent Version II is integrated in the new CPUIV. Thereby you do not need to install an agent to your computer.

Through a MIB Browser you may takeover all the multisite DS200 IPs and change/view the parameters which are :

  • The status of system slots
  • Capacity of the cards installed in slots
  • Version of the System SW
  • Port Access Codes
  • LCR
  • Statistics
  • Alarms on the system
  • Finally, you may easily update the Master Software using MIB Browser.

Technical Specifications

System Capacity

  • Start-up Capacity – 0/0.
  • Number of the Slots for the Expansion Modules – 14 (One rack) to 84 (Six Racks).
  • Max. Capacity (TDM) – 224 (One Rack) to 1344 Ports (Six Racks).
  • Max. Capacity (IP) – 750 Ports (Lines + Extensions).
  • Busy Hour Traffic of 3600 Calls/Hour per rack.

Hardware Specifications

  • Distributed Microprocessor Structure that provides at most flexibility for a Digital System.
  • Open Architecture Design.
  • Flexible and Hybrid Structure
  • DSP/ICP/SMPS Technologies
  • Cards that have been produced with SMD Technology.

Software Specifications

  • IP Extension And Trunk Channels.
  • Embedded Proxy, Registrar, Presence and IM Servers
  • License Controlled IP Channels
  • Embedded Self Test Ability
  • Linux (Suse 11.0) Real-Time Operating System
  • SDL for the main system software as the programming language, and C for the modules.
  • Computer Aided Software Engineering (CASE)
  • Possibility of programming the exchange Locally or Remotely
  • Possibility of programming over a PC.

Physical Specifications

  • Modular structure with slots for easy installation / maintenance.
  • Possibility of Wall or Cabinet type installation.

Compatibility Specifications

  • SIP and H323 Protocols on IP Side.
  • Direct use of Fully Digital Phone Sets.
  • Compliance to the requirements for connection to Peripheral Devices like Answering machines, DECT Telephones, Fax and Modems.
  • Euro-ISDN BRI / Euro-ISDN PRI Compatible
  • DDI/MSN Numbering.
  • PP/PMP Configuration
  • 1000 Different Phone Numbers on PRI Lines
  • Possibility of Configuring PRI Lines in Both TE and NT Modes
  • Possibility of making use of all ISDN Services.
  • Interface Unit that operates with the R2 Protocol that contains 30 Digital Channels.
  • Support for Video Conference and Fast Ethernet Applications.
  • Easy and flexible connection to any Router.
  • Support for most Inter-Exchange connections.
  • Interface for Local Battery telephone connection.
  • Compatible with most Hotel Applications.
  • External music connection.
  • Door Opener activation.

Reliability Specifications

  • Backed up power supplies for uninterrupted operation
  • Automatically activated Redundant CPU card for uninterrupted operation
  • Module replacement without cutting down the system power
  • Low battery Power Cut-off / Automatic charging
  • Three level of Over-voltage / current protection
  • Possibility of transferring exchange / user paramaters to a printer
  • Access to call record information over a PC or a printer
  • Possibility of filtering call records
  • Flexible / Automatic Numbering Plan

Optional Specifications

  • Power backup by the battery
  • Conference feature with 32 participants
  • Voice Mail Capacity upto 1360 Min.
  • Capacity of precessing 32 recordings / 32 playbacks simultaneously
  • Voice Messages to inform the status of their phones
  • More economical calls over GSM Lines, by the GT10 and GT20
  • Direct Transfer of lines to extensions in case of a power failure, by the HR08
  • Additional protection against Lightning, AM Interface and Leakage Signals from the power lines, by the SF04 and SP04
  • CTI Software – NET-Console
  • Protection against high voltage

Expansion Modules

  • EX200 (8+/0) Analog Extension Module (with Optional CLID)
  • EX200 (8+/0) – FSK Caller ID Add-On Card (in FSK Mode)
  • EX200 (8+/0) – DTMF Caller ID Add-On Card (in DTMF Mode)
  • EX200 (0/16C) Analog Extension Module (with CLID)
  • EX200 (0/8KoU) Digital Extension Module
  • EX200 (0/16KoU) Digital Extension Module
  • EX200 (0/8S0) ISDN BRA Extension Module
  • EX200 (0/8LB) Local Battery Extension Module
  • EX200 (8T0/0) ISDN BRA Line Module
  • EX200 (1S2/0) ISDN PRA Line Module
  • EX200 (1S2-R2/0) Combo ISDN PRA / E1 – R2 Line Module
  • EX200 (4E&M/0) E&M Line Module
  • EX200 (8E&M/0) E&M Line Module
  • EX200 (4PLC/0) PLC Line Module
  • EX200 (4TWT/0) TWT Line Module
  • EX200 (8TWT/0) TWT Line Module
  • EX200 (MGW1) Media Gateway Module (with 16 VoIP Channels)


  • LCS200 – SIPE1 – DS200 SIP Extension License (1 SIP Extension)
  • LCS200 – SIPE5 – DS200 SIP Extension License (5 SIP Extensions)
  • LCS200 – SIPE10 – DS200 SIP Extension License (10 SIP Extensions)
  • LCS200 – SIPE50 – DS200 SIP Extension License (50 SIP Extensions)
  • LCS200 – SIPE100 – DS200 SIP Extension License (100 SIP Extensions)
  • LCS200 – SIPL1 – DS200 SIP Line License (1 SIP Line)
  • LCS200 – SIPL4 – DS200 SIP Line License (4 SIP Lines)
  • LCS200 – SIPL12 – DS200 SIP Line License (12 SIP Lines)
  • LCS200 – H323L1 – DS200 H.323 Line License (1 H.323 Line)
  • LCS200 – H323L4 – DS200 H.323 Line License (4 H.323 Lines)
  • LCS200 – H323L12 – DS200 H.323 Line License (12 H.323 Lines)
  • LCS200 – MG4 – DS200 MGW Channel License (4 VoIP Channels)
  • LCS200 – MG8 – DS200 MGW Channel License (8 VoIP Channels)
  • LCS200 – MG12 – DS200 MGW Channel License (12 VoIP Channels)
  • LCS200 – MG24 – DS200 MGW Channel License (24 VoIP Channels)
  • LCS200 – PRS_IM – DS200 Presence & Instant Messaging
  • LCS200 – NETCM+NETCON – DS200 Net-CM+Net-Console License (for CRL & PC Console)