When the system is configured as an SDLC secondary station on a multipoint configuration object, the communications controller traces all records or frames.
The records or frames sent to the system include those records and frames intended for other stations. When you use the communications trace service tool to format the data for this configuration, the resulting report might show received records that were intended for other stations.
On a single point-to-point line, where only one secondary station is configured, SDLC traces all frames received before it gets the frames intended for other station addresses. It is not until the secondary SDLC receives the other station addresses that it knows which single-station address the communications equipment uses.