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ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

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Defining the VN4 SubroutinesVN4_TRANSFER_START is the only VN4 subroutine that can be activelyadded to an InVision application. All other VN4 subroutines appear inthe application, but are internal to VN4_TRANSFER_START. They arecalled automatically, <strong>and</strong> cannot be added by the user.These internal subroutines include:• VN4_DIAL• VN4_DISC_STATE• VN4_GET_BUSY_STATE• VN4_GET_CONNECT_INIT_STATE• VN4_HOLD_RESULT• VN4_HANG_VIRTUAL_LINE• VN4_HOLD• VN4_HOLD_RETURN• VN4_VIRT_CAUSE• VN4_XFER10-4 <strong>ISDN</strong> <strong>Protocol</strong> Administrator’s <strong>and</strong> Developer’s <strong>Guide</strong> 60001262, First Edition

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