Inter-working Function
Encyclopedia
The Inter-working Function (IWF) is a method for interfacing a wireless telecommunication network with the PSTN
. The IWF converts the data transmitted over the air interface in to a format suitable for the PSTN
.
IWF contains both the hardware and software elements that provide the rate adaptation and protocol conversion between PSTN
and the wireless network.
some system require more IWF capability than others, depending on the network which is being connected
The IWF also incorporates a "modern bank", which may be used when,for example, the GSM Data Terminal Equipment (DTE) exchanges data with a land DTE connected via analogue modem
The IWF provides the function to enable the GSM system to interface with the various
forms of public and private data networks currently available.
The basic features of the IWF are listed below.
� Data rate adaption.
� Protocol conversion.
The IWF also incorporates a ‘‘modem bank”, which may be used when, for example, the
GSM Data Terminal Equipment (DTE) exchanges data with a land DTE connected via
an analogue modem.
Public switched telephone network
The public switched telephone network is the network of the world's public circuit-switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, all inter-connected by...
. The IWF converts the data transmitted over the air interface in to a format suitable for the PSTN
Public switched telephone network
The public switched telephone network is the network of the world's public circuit-switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, all inter-connected by...
.
IWF contains both the hardware and software elements that provide the rate adaptation and protocol conversion between PSTN
Public switched telephone network
The public switched telephone network is the network of the world's public circuit-switched telephone networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, all inter-connected by...
and the wireless network.
some system require more IWF capability than others, depending on the network which is being connected
The IWF also incorporates a "modern bank", which may be used when,for example, the GSM Data Terminal Equipment (DTE) exchanges data with a land DTE connected via analogue modem
The IWF provides the function to enable the GSM system to interface with the various
forms of public and private data networks currently available.
The basic features of the IWF are listed below.
� Data rate adaption.
� Protocol conversion.
The IWF also incorporates a ‘‘modem bank”, which may be used when, for example, the
GSM Data Terminal Equipment (DTE) exchanges data with a land DTE connected via
an analogue modem.