Incorporation(1990~1993)
1990. 8    Established Telemann Corporation
1991. 2    Hand-held Ham Radio develop & manufacture
1991. 5    PLL Land Mobile Radio develop & manufacture
1991. 7    Radio remote control system develop & manufacture
1992. 2    900MHz CT1/CT1+ develop & manufacture
1992. 11  UHF PLL hand-held Radio develop & manufacture
1993. 10  Cordless Phone test system develop & manufacture
Growth (1994~2003)
1995. 5    CATV  broadcasting video signal processor developed & manufactured
1996. 2    45~950MHz RF Signal level meter developed & manufactured
1997. 2    5~755MHz CATV signal/spectrum analyzer developed & manufactured
1999. 6    CATV cable modem developed and manufactured
2000. 4    Sat signal/spectrum analyzer 1602 developed & manufactured
2001. 9    Korea Ministry of Information and Communications selected Cable Internet Analyzer as standard measuring equipment
2002. 3    Korean Digital Satellite Broadcasting standardized on Telemann Corporation measuring equipment
2003. 5    Supplied Signal Satellite Meter for a Skylife
2003. 5    Supplied Signal Satellite Meter for a Hanaro telecommunication, Durunet
2003. 5    Participated in MEDIACAST (UK) exhibition
Take - off(2004~)
2004.  2     Developed Digital TV Signal Analyzer 1702
2004.  3     Developed Digital TV Signal Analyzer 1703
2004.  5     Participated in MEDIACAST(UK) exhibition
2004.  8     Acquire CE certification of 1702/1703
2004.  9     Export Signal Analyzer to CHINA, INDIA
2004. 10    Developed the TG-1300 & supplied the 1703, TG-1300 for the Public Network
2004. 11    Developed Europe type of1 720/1730 COFDM
2005.  1    Developed 1720/1730QAM
2005.  2    Developed 1730/1730 QAM of  Korea & America  type
2005.  3    Developed 1720/1730 VSB/QAM  Korea & America  type
2005.  3    Export Signal Analyzer to Europe
2005.  3    Acquire CE certification of Digital Signal Analyzer
2005.  5     Participated in KOBA (Korea) exhibition
2005.  6     Participated in KCTA (Korea) exhibition
2005.  5     Participated in ANGA CABLE(Germany) exhibition
2006.  6     Export Signal Analyzer to Australia, Eastern Europe
2006.  9     Participated in IBC (Netherland) exhibition
2007.  5     Participated in IBC, ANGA CABLE and etc exhibition
2008.  5     Participated in ANGA CABLE(Germany) exhibition
2008.  8     Supplied HD DVB-S2 for Sky-life
2009.  2     Participated in CSTB2009(Russia) exhibition
2009.  3     Developed Combo SMATV 1950, Combo Signal Generator 1800 for  the Public Network