INTRODUCTION OF IP TELEPHONY INTO BUSINESS SYSTEM COAL MINE VELENJE

Tema diplomskega dela je uvedba IP telefonije v Poslovni sistem Premogovnika Velenje (v nadaljevanju PS PV) z namenom posodobitve telekomunikacijskih naprav, sistemov in omrežja. Za prenos govora preko podatkovnih omrežij bomo uporabili Internetni protokol (IP). Telekomunikacijsko omrežje (v nadaljevanju TK omrežje) na področju PS PV je staro in zahtevno za vzdrževanje. To se odraža na vse večjih stroških, ki pri vzdrževanju nastajajo. Največjo težavo predstavljajo kabelske povezave ter zagotavljanje rezervnih delov za vzdrževanje telefonske centrale SI2000. Kabelske povezave med telefonsko centralo in uporabnikom v večini primerov potekajo po zemlji ali električnih kinetah. Težave nastanejo pri močnem deževju, ko vlaga vdre v kabelski vod (izvedba s svinčenim plaščem in papirno izolacijo) in pri tem povzroča kratke stike na telefonskih linijah. Telefonska centrala iCS SI2000 obratuje od leta 2001 na 95% svoje zmogljivosti. Materiali so iztrošeni in zanesljivost delovanja je vprašljiva. Rezervnih delov ni več moč dobiti in so glede na vrednost same centrale zelo dragi. Z uvedbo IP telefonije se bomo izognili starim kabelskim povezavam z vgradnjo nove iCS SI3000 telefonske centrale pa zagotovili sodobno TK omrežje. Diplomsko delo vsebuje analizo stanja TK omrežja na področju Premogovnika Velenje, na osnovi katere so bile podane zahteve za izgradnjo sistema IP telefonije. Opisani so tudi gradniki sistema IP telefonije, ki bodo v uporabi na zunanjih objektih (jamski objekti niso vključeni). Osnova za izgradnjo sistema IP telefonije na področju PS PV je integrirani klicni strežnik SI3000 (v nadaljevanju telefonska centrala) slovenskega proizvajalca Iskratel. Predstavljen je tudi zgrajen sistem IP telefonije, ki dejansko obratuje na področju PS PV in podana je vsa problematika, ki nas je spremljala pri zagonu sistema.The theme of the thesis is the introduction of IP telephony in the Premogovnik Velenje Business System (hereinafter: PV BS) with a view to modernise telecommunication devices, systems and network. For voice transmission over data networks, Internet Protocol (IP) will be used. The telecommunication network (hereinafter: TC network) in the area of the PV BS is obsolete and difficult to maintain. This is reflected in the increasing costs incurred during maintenance. The greatest problem is posed by cable connections and provision of spare parts for the maintenance of the SI2000 telephone exchange. Cable connections between the telephone exchange and the user are mainly laid in the ground or in electrical ducts. Problems occur during heavy rainfall when moisture penetrates the cable line (paper insulated lead sheathed cable), causing short circuits on telephone lines. The iCS SI2000 telephone exchange has been operating at 95 percent of its capacity since 2001. The materials are worn out and the reliability of operation is questionable. Spare parts are no longer available and are extremely expensive considering the value of the device itself. The introduction of IP telephony will allow us to avoid using the old cable connections, and installation of the new iCS SI3000 telephone exchange will provide a modern TC network. The thesis contains the analysis of condition of the TC network in the area of Premogovnik Velenje, on the basis of which requests for building the IP telephony systems were made. The components of the IP telephony system intended for use in the external facility (mine facilities are not included) are also described. The basis for building the IP telephony system in the area of the PV BS is the SI3000 integrated call server (hereinafter: the telephone exchange) made by Slovenian company Iskratel. The constructed IP telephony system that is actually in operation in the area of the PV BS is also presented, together with all the problems that accompanied the starting up of the system