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IWF contains both the hardware and software elements that provide the rate adaptation and protocol conversion between [[Public Switched Telephone Network|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
{{DEFAULTSORT:Inter-Working Function}}
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