Accord Communications manufactures ISDN Key telephone systems to meet futuristic requirements of the convergence of voice, data and image for small and medium offices looking for most modern telecommunication system. This special DKTi series ISDN key telephone system allow the customers with full integration with ISDN to pass on the benefits of ISDN like caller line identification [CLIP], advice of charge [AOC], multiple subscriber numbering [MSN], data transmission at 128 Kbps, video conference, etc. Apart from ISDN, the system also offers a lot of advantages for analog trunk line users such as CLI on analog trunks, directory dialing by name, 32 party conference, unanswered calls record; 2 port - 7 level auto attendant, 70 times auto redial, different rings for different telephone numbers, etc. The ISDN key telephone system also support the futuristic features like Computer Telephone Integration [CTI], Least Cost Routing [LCR], Flash ROM Technology, LAN Connectivity, DECT Connectivity. The company supplies these ISDN key telephone system in two models DKTi-1 and 2. The first starts from 4+8 and can be expanded up to 8+24 and can accommodate up to 3 BRI lines and the other series DKTi-2 starts from 4+8 and can be expanded up to 16+48 and can accommodate up to 6 BRI or 1 PRI.