1999EG 201 050-1999 Speech Processing@ Transmission and Quality Aspects (STQ); Overall Transmission Plan Aspects for Telephony in a Private Network (V1.2.1)
1998EG 201 050-1998 Speech Processing@ Transmission and Quality Aspects (STQ); Overall Transmission Plan Aspects for Telephony in a Private Network (V1.2.1)
1997EG 201 050-1997 Corporate Telecommunication Network (CN); Overall Transmission Planning for Telephony on a Corporate Network (V1.1.1)