Supports Partial Rerouting: Default = Off, Software level = 4.0+.
Partial rerouting (PR) is an ISDN feature. It is supported on external (non-network and QSIG) ISDN exchange calls. When an external call is transferred to another external number, the transfer is performed by the ISDN exchange and the channels to the IP Office are freed. Use of this service may need to be requested from the line provider and may incur a charge.
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