The cover cap and cover frame (1-gang to 5-gang) can be used to integrate third-party devices with a square centre plate (50 x 50 mm) such as those from Alcatel, AMP Econo Link System, Brand-Rex, METZ CONNECT (BTR), Kannegieter BICC Brand Rex, Krone, Molex, Reichle de Massari, Rutenbeck, Schumann Netzwerktechnik RJ45 connection box cat.5 BICC, Siemens ICCS 100 and 300, Telegärtner, Telenorma, TKM, Quante, Panduit (2-gang MSCSP 2) etc., into the design line.