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Introduction
The Interworking Function (IWF) acts as a gateway between the mobile network and data network infrastructure such as a WAP gateway.
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Purpose
The IWF is used to facilitate a circuit switched connection from the MSC to the WAP gateway.
In addition the IWF can be used to support mobile originated and terminated calls for asynchronous data and fax.
The IWF's role is to synchronize events between the circuit-based network and the packet data network.
The IWF is not required for packet based networks such as GPRS.
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