Sending and receiving ISDN-specific messages

Some variants of the ISDN Software protocol support sending and receiving ISDN-specific messages for which there are no NCC API equivalents. ISDN Software currently supports the following ISDN-specific features:

This feature...

Allows an application to...

Transparent message sending and receiving

Send user-defined information elements (IEs) to the stack, and receive FACILITY messages that are not recognized by the stack.

Request call ID for call transfer

Request an identifier for one of two calls transferred together. This feature is useful when both calls are inbound.