COMMUNICATIONS CONVERTER FOR THE CONVERSION OF SYNCHR. OR ASYNCHRONOUS SERIAL DATAS TO A E1 (2 MBIT/S-G703.6) OR T1 (1.544 MBIT/S) NETW. INTERF. TWO INDEPENDENT SERIAL OPTICAL INPUTS WITH ST-CONNECTORS WITH 820NM FOR MULTIMODE FIBER CABLE FOR MAX.512 KBIT/S/115,2 KBIT/S FOR SYNC./ASYNC. DATAS. ONE RS232 INTERFACE WITH MAX. 115,2 KBIT/S DESIGNED AS 9POL. SUB-D SOCKET FOR THE CONNECTION WITH DIGSI-KABEL 7XV5100. WIDERANGE POWER SUPPLY/AUXILLI. VOLTAGE FROM 24V-250V DC OR 115/230V AC