IBM 3708 Description page 283

Control Terminal Access
. The 3708 allows the control terminal operator to exclude control terminal access on
a port by port basis. If control terminal access is set to
I
N
I
for a downstream port,
access to control terminal functions is not possible. The user is not prompted with
the "c - Control Terminal" option on the host selection screen and a
I
c
I
input is
rejected with an Incorrect Response message.
Multiple Control Terminal Sessions
The 3708 does not allow multiple control terminal sessions. If the control terminal is
in use and an attempt to gain access to the control terminal is made by another user,
the 3708 does the following:
• Rejects the second control terminal request with a Control Tenninal Already
Act i ve message
• Notifies the existing control terminal that an attempt was made to gain access to
the control terminal functions with a ClOO Activation of Another Control
Tenninal Session Rejected message.
Transmission of UNBIND(OF) and/or TERM-SELF(40)
The 3708 transmits an UNBIND(OF) and NOTIFY (power off) or TERM-SELF(40)
and NOTIFY (power of!), or just NOTIFY (power off) SNA command to the host
to terminate a user's LU-LU session under the following conditions:
• The user is disconnected or powers off in the middle of the session
• The 3708's inactivity timer expires.
The NOTIFY (power off) ensures that the SSCP is aware of the loss of a session.
The UNBIND(OF) or TERM-SELF(40) command ensures that the network
terminates the LU-LU session and prohibits another user from dialing into the same
3708 port and gaining access to the previous user's application. See "Ending Host
Sessions and Disconnecting from the 3708" on page 2-12.
Inactivity Timeout
An inactivity timeout can be configured for each dial-in port or for each port using
EIA 422A interface. The timer is reset each time a character is transmitted from the
host or from the terminal. If the timer expires, the SNA session is broken. See
"Ending Host Sessions and Disconnecting from the 3708" on page 2-12 for more
information.
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IBM 3708 Description