CONNECTED TERMINALS THROUGH AN A/B SWITCH

ITEM: RTA000025680



QUESTION:                                                                       
I have a customer with a RISC system/6000 model 320 with a wyse 185             
attached through an A/B hardware switch.  Depending on the position of          
the switch, the terminal is connected to the RISC or to a COMPAQ System         
Pro PC.  When the customer changes the switch to connect to the PC from         
the RISC, and then switches back to the RISC, the RS/6000 has logged            
him off.  Is there a way to get around this and keep his session active         
even when the terminal is not physically connected to the RISC?                 
                                                                                
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A:   Yes, there is a way that you can keep the RISC session active,             
     while switching to a COMPAQ System Pro PC.  You will need to set           
     "clocal" and "nohang" to the STTY attributes for run time and              
     login field.  This can be done as follow:                                  
                                                                               
     smit                                                                       
       Devices                                                                  
         TTY                                                                    
           Change/Show a Characteristics of a TTY                               
             STTY attributes for RUN TIME                                       
               **** set "clocal" for this field ****                            
             STTY attributes for LOGIN                                          
               **** set both "clocal" and "nohang" to this field ****           
                                                                                
     By setting the "clocal", it assumes that there is a line without           
     modem control.                                                             
     By setting the "nohang", it specifies that a hang-up signal not to         
     be sent if the carrier drops.                                              
     As long as you don't request any data from the RISC, you will              
     not loose any data.  However, if you  request the data from the           
     RISC while you are switching to the a COMPAQ system Pro PC, you will       
     loose this data since the terminal is not available to receive it.         
                                                                                
     For additional on the "clocal" and "nohang", please refer to               
     InfoExplorer by searching under "stty" command.                            
                                                                                
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This item was created from library item Q600596      BQSMR                      
                                                                                
Additional search words:                                                        
BQSMR CONNECTED IX OCT92 OP OZNEW OZNOTPID RISCOSO RISCSYSTEM                   
SOFTWARE SWITCH SWITCHING SYS TERMINAL TERMINALS THROUGH                        
                                                                               


WWQA: ITEM: RTA000025680 ITEM: RTA000025680
Dated: 11/1996 Category: RISCOSO
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