Provides an indication as to which attribute should be used to apply to a call's connection ID. This function allows for backward compatibility to T-Server versions which assumed a given call would have a unique identifier across multiple sites. AttributeFirstTransferConnID is used instead of AttributeConnID if AttributeFirstTransferConnID is present in the message from the T-Server.
|mode||Mode specifying whether AttributeFirstTransferConnID is to be substituted for AttributeConnID when referring to the connection ID for this call.|
Standard (See standard-return-values.)
This function does not generate any messages to T-Server.