Ports

A port is one end of a 64 kbps unidirectional stream, which can be attached to the TDM bus. Ports can be seen as sources, which put voice on to the TDM bus, or sinks which take voice data from the TDM bus. Examples of source ports are:

• The stream received from a caller via a telephony channel and placed on the TDM bus by the DTNA.
• The stream that may be generated by a fax card.

An example of a sink port is:

• The stream taken from the TDM bus by a fax card to decode a fax.