NF Z81-116*NF ETS 300116:1993 Attachments to the public switched telephone network (PSTN). Category II attachment for 1200 bits per second duplex modems standardized for use on the pstn (candidate NET 22).
1993NF Z81-116*NF ETS 300116:1993 Attachments to the public switched telephone network (PSTN). Category II attachment for 1200 bits per second duplex modems standardized for use on the pstn (candidate NET 22).