Information technology. International standardized. Profiles TB, TC, TD and TE. Connection-mode transport service over connection-mode network service. Part 9. Subnetwork-type dependent requirements for network layer, data link layer and physical layer concerning permanent access to a paket switched data network using virtual calls
Rectangular iron all-cast moulding boxes having inside dimensions: length from 400 to 500 mm, width from 300 to 400 mm, height from 100 to 200 mm. Construction and dimensions
