Siemens RM400 C Series Operating Manual page 204

Abbreviations
EEC European Economic Community
EISA Extended Industry Standard Architecture
EMC electromagnetic compatibility
EN Europa-Norm (European standard)
E-SIH EISA-Bus Serial Interface Multiplexer Inhouse
E-SIM EISA-Bus Serial Interface Multiplexer
EWAN EISA Wide Area Network
FCC Federal Communications Commission
FDDI Fiber Distributed Data Interface
GCR Group Coded Recording
HD high density
HDLC High-level Data Link Control
ID identification, identifier
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IHSS Inhouse interface
IHSS-MP Inhouse Multipoint (Controller)
IMD Inhouse Multiplexer data line
I/O input/output
ISA Industry Standard Architecture
ISDN Integrated Services Digital Network
ISO International Organization for Standardization
ITC intelligent terminal controller
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RM400 C Models U24802-J-Z146-2-7600