B.3 Session Status Messages

The following Session Status messages tell you whether your computer and the host system are ready to communicate:

S

At initialization, this message indicates that the 3270 emulation program is not yet connected to the host; after a few seconds, it should change to one of the other messages in this list.

If the session has started but has been interrupted, this message indicates that the connection to the host has failed. There should be a communications check code (-+z_nnn) displayed; check this in Communications Check Codes.

SB?

The 3270 emulation program is connected to the host, but the 3270 LU has not yet been activated. This message should change to

SB*

after a few seconds.

SBN

The session is in Network Virtual Terminal (NVT) mode, usually because it is negotiating whether to use TN3270, TN3270E, or TN3287 protocols. Data that appears on the screen is NVT data, not 3270 data.

SB*

The display station is in session with the host component called System Services Control Point (SSCP) which handles logging on. The LU has been successfully activated.

Either you have not yet logged on to a host application, in which case you should enter the appropriate logon command for the required host application, or you have used the SYSREQ key (default keystroke Ctrl + Y) to switch to the host control session, in which case you should use SYSREQ again to return to the application session.

SB#

The 3270 emulation session has established communication with the host application program. If the session is using TN3270E protocols, the name of the host application is shown in the Control Display Sessions dialog box. Log on to the host application if you have not already done so.