User`s guide

2: BSC Protocol Summary
DC 900-1340I 43
Table 2–3: BSC 2780/3780 Session Access Modes
Mode Usage
Manager Set Manager mode for a session by setting the DLI “mode” configuration
parameter to “mgr.” Manager mode gives the client the right to issue any com-
mand or request. There can be only one Manager session per link.
Read Set Read mode for a session by setting the DLI “mode” configuration parame-
ter to “read.” Read mode gives the client the right to issue the same commands
as Manager mode (except the Autodial Start and Modem Configuration com-
mands). The main difference between the two modes is that when a Read ses-
sion is present, all incoming serial line data read from the link is sent to the
Read session only. Additionally, the safe store acknowledgment and disconnect
acknowledgment are sent to the Read session, even if the commands were
issued by the Manager session (the Manager session receives no acknowledg-
ment). All error reports are duplicated and sent to both the Manager and Read
sessions (the Autodial Start acknowledgment is sent to the Manager session
only). Only one Read session is allowed per link.
Control Set Control mode for a session by setting the DLI “mode” configuration
parameter to “control.” The Control session may not transmit data and does
not receive incoming data. Any Manager session for the link with an active
Control session does not receive copies of responses to commands sent by the
Control session. There can be only one Control session per link.
Trace Set Trace mode for a session by setting the DLI “mode” configuration parame-
ter to “trace.” There is only one Trace session allowed per link on the ICP, for
monitoring the activity on that link. The Trace session is limited to issuing or
receiving the Start Link Trace and Stop Link Trace commands, and for receiv-
ing link trace data (see Section 5.4.1.15 on page 136).