Nokia 3G 0800 015 0286 - Manual (Page 17)

ITU
International Telecommunications Union. ITU is a UN affiliated body engaged
in standardisation relevant to international telecommunications. It includes
two standardising divisions, i.e. ITU-T (standardisation for modems, ISDN,
network interfaces for communication system operators, etc.) and ITU-R
(standardisation related to radio communication services). Standards
established by the organisation are referred to as “recommendations”, and are
formally adopted as such only upon the unanimous consent of all member
countries.
Iu
Standardised interface between a Radio Network Controller Network and
Packet Subsystem (e.g. RNC3GSGSN)
Iub
Interface between a Base Station and Radio Network Controller.
IWF
Inter-Working Function. A system under voice band data communication
service _MODFM: V.90 max. 56kbps/ G3 FAX: max. 14.4kbps_ which
functions to convert digital signals transferred over the air interface to 3.1 KHz
band data.
I
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