DECT system to the enterprise

Published on March 02, 2012

DECT system to the enterprise

    According to forecasts of RUmetricsfrom November 26, 2009 the DECT market in Russia will increase from 10% to 20 - 25%, now already in 2012 we can safely say that yes, the way it is. Already, many companies and the enterprise are switching from old analog PBXs to new IP-PBXs and Unified Communications systems, at the time of such a transition very often with the transition to IP, a transition to mobile solutions, that is, DECT systems, is carried out. Basically, DECT solutions are mostly used at home or in small offices (approximately 80%) where only one base station is used and from one to six handsets. For medium and large companies, such single-base solutions are not suitable since they need to cover large areas and support a lot more subscribers, in fact, the DECT system for an enterprise is its own cellular network, which consists of many base stations, repeaters and subscribers.

    Technical task


    All projects, as you know, begin with a technical task and a list of "Wishlist", so I will start. And so in brief I will tell about the enterprise where the DECT network will be deployed:
    • Number of subscribers - up to 300
    • Number of channels - 50
    • Area - 40600 sq.m
    • Number of buildings - 4
    • External lines - 2 PRI

    Infrastructure - Optical fiber
    I can single out a couple of main points from the whole TK: of the four buildings, only the Administrative building (4-storey building of 2500 sq. M per floor) needs a DECT coating, a Production shop (one large shop for 12000 sq. M) building on the 1st floor with an area of ​​1,500 meters divided into small rooms. There is a small distance between the administrative and production hall, up to 200 meters, the third building is about 1 km away from all. The DECT system must support at least 300 subscribers and 50 channels throughout the coverage area.

    Commercial offer


    After studying the technical specifications, the client is presented with the following estimate for equipment:
    • KIRK 6000 IP system controller - 1 pc.
    • KIRK 6000 IP Media Resource Controller - 1pc
    • KIRK6000 system authorization key - expansion to 500 subscribers - 1 pc.
    • KIRK 6000 IP base station - 13pcs
    • Repeater 4CH mulitsel SMB connector with an external antenna - 1 piece
    • Directional Antenna - 1pc
    • Repeater 4 channels multisel - 3pcs
    • Wireless handset DECT KIRK 4020 - 47 pcs.
    • DECT KIRK 2010 cordless handset - 55 pcs.
    • Cordless handset DECT KIRK 5020 - 15 pcs.
    • Switchvox Asset Management Server AA355 - 1 pc.
    • E1 card for 2 ports (TE207P) - 1 pc.
    • Subscriptions for Switchvox - 240 pcs.

    Description of KP.

    The KIRK 6000 system controller is used to manage subscribers and convert the call to SIP. In our case, the controller needs only one, the client refused the reservation (you can install 2 controllers and use one as master, the second as slave).

    By default, the controller can only work with 30 subscribers, so in the CP we added an Authorization Key to expand to 500 subscribers.

    In addition, the controller has a limit on simultaneous channels, up to 30, so we added the Media Resource Controller to the system, it will expand the number of channels by another 30.

    DECT network scheme:


    In the administrative building, where 4 floors, we need 8 BS, for each floor 2 pieces. Base stations are located at the top of each floor and are directed at each other. There are no walls in the production hall and there are no obstacles for DECT, so we installed 2 BSs on opposite sides of the workshop (Ethernet was only extended there) and 2 repeaters in the middle. To connect the third building to the production hall from the outside, we installed one BS directed towards the third building, after which, on the other hand, we installed a repeater with an external antenna directed towards the workshop and 2 base stations.

    Photo


    When preparing the iron for the installation, it was interesting what was inside, the photos below:

    KIRK 6000 IP and BS system controller



    System Setup


    Basic settings of the KIRK 6000 server ( man )

    By default, KIRK6000 has an IP address of 192.168.0.1, a user admin, and an ip6000 password. First of all, we change the IP: SIP server parameters and codecs Connecting the BS to the KIRK600 Server To connect the BS, I distributed all IPs via DHCP and in the Wireless Server Host settings I specified the IP address of the Server. Now the BS is visible on the server and it can be configured and synchronized with other BSs or repeaters in the coverage area. Connecting handsets In the server settings, I turned on Autocreate users and Subscription allowed in order to quickly connect all the handsets to the system. After each tube is assigned its own user on Switchvox. Check registration on Switchvox:


























    As you can see from the pictures, everything is quite simple to set up, the only problem was the correct connection between the BS and the repeaters. The fact is that each BS has its own RPN (Radio Part Number) number and for synchronization it is necessary to connect each BS to at least one other BS, for example BS-1 is installed on the ground floor of the administrative building BS-2 is also on the ground floor in another wing , for synchronization in the settings of BS-2, I specify the RPN of BS-1. For BS-3, I’ll indicate the RPNs of BS-2 and BS-3 (you can specify two RPNs for master & slave synchronization) and so you need to go through all the BSs and configure them.

    The project was successfully completed, the client is satisfied and we are satisfied with the work, the KIRK system has been working without problems for a couple of months. I hope that our experience in implementing DECT systems will help you.