[comp.sys.hp] Telebit on HP9000/370

jeff@dsndata.uucp (Jeff Minnig) (01/31/89)

I'm trying to hook up a Telebit Trailblazer+ to a HP9000/370 via
a 98642 mux (port 0).  This is the 25-pin port on the '42.  The
problem is that I cannot seem to get the modem and the system
to agree on how hardware handshaking should work.  The modem seems
to work ok at LOW (cough,sputter) speed using XON/XOFF, but that is
unacceptable for high-speed transmissions.  I have a pair of the TB's,
and a pair of phone lines, so testing isn't a problem... 

The configuration that I've come up with so far is:

E0 F1 M1 Q0 T V1 X0

S07=070		Wait For Carrier Time                          
S09=006		Carrier Detect Time                            
S47=004		DSR Delay Time                                 
S48=001		Eight Bit Comparison                           
S50=000		Transmission Mode                              
S51=254		Interface Speed                                
S52=002		DTR Interpretation                             
S53=000		DCD and DSR Interpretation                     
S58=001		Flow Control Used By DTE (System)              
S60=000		Data Format                                    
S66=000		Lock Interface Speed                           
S67=000		CTS Interpretation                             
S68=255		Flow Control Used By DCE (Modem)               
S92=001		Answering Sequence Selection                   
S110=255	Data Compression Enable                        


I need to know:

a)      How do I configure the modem?  Regs 52, 53, 58, 67, and 68
        will have to be configured, but what values?

b)      How are the /dev's created under hp-ux 6.2, ie, what bits
        do you set with the mknod?

c)      Any special tricks with cables?

d)      How about using the 9-port builtin 98644 in the main system
        cabnet?  Any problems there?

e)      Is there a difference in the configuration between dialing
        out from the modem and answering in?

        Thanks in advance...

        Jeff Minnig

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Jeffrey T. Minnig               | LL:   (402) 476-8278
Systems Analyst                 |
Design Data                     |
1033 'O' St.  Suite 324         | net: dsndata!jeff
Lincoln NE 68508                | 
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Jeffrey T. Minnig               | LL:   (402) 476-8278
Systems Analyst                 |
1033 'O' St.  Suite 324         | net: dsndata!jeff
Lincoln NE 68508                | 
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