wwm@pmsmam.uucp (Bill Meahan) (03/08/90)
I know this was posted last year but, darn it!, I didn't save a copy.
What is the correct cabling for connecting a Telebit (T2500) to a
6-channel MUX on an 825? (MUX is HP98196A aka 27140A).
Thanks!
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/* witty */ |packet: wa8tzg @ wa8ooh.mi.usa.narjn@hpfcso.HP.COM (Bob Niland) (03/08/90)
re: > What is the correct cabling for connecting a Telebit (T2500) to a
> 6-channel MUX on an 825? (MUX is HP98196A aka 27140A).
The pin-outs on the 27140A MUX are dual-function DCE/DTE. They are wired to
look like a DCE, with the missing DTE functions on otherwise unused pins.
For direct connection of DTE devices (e.g.terminals, printers, etc.), you
use a 1-1...25-25 straight-thru cable, such as an HP 40242M.
For connection of DCE devices (e.g.modems), you need a special cable that
brings the hidden pins to life. It is ordered as product number 92219Q.
If you want to make your own cable, I suspect someone can post the pinouts.
I can't find my copy from the last time this came up....
Regards, Hewlett-Packard
Bob Niland rjn%hpfcrjn@hplabs.HP.COM 3404 East Harmony Road
UUCP: [hplabs|hpfcse]!hpfcla!rjn Ft Collins CO 80525-9599bill@hpuorfa.HP.COM (Bill Chidester) (03/09/90)
> re: > What is the correct cabling for connecting a Telebit (T2500) to a > > 6-channel MUX on an 825? (MUX is HP98196A aka 27140A). ............... > > If you want to make your own cable, I suspect someone can post the pinouts. > I can't find my copy from the last time this came up.... > > Regards, Hewlett-Packard > Bob Niland rjn%hpfcrjn@hplabs.HP.COM 3404 East Harmony Road > UUCP: [hplabs|hpfcse]!hpfcla!rjn Ft Collins CO 80525-9599 The pinouts for the 92219Q cable are: CPU Peripheral 25 Pin M 25 Pin M 1 ------------------------------------------ 1 2 <----------------------------------------- 3 3 -----------------------------------------> 2 4 <----------------------------------------- 8 6 -----------------------------------------> 20 7 <----------------------------------------> 7 8 -----------------------------------------> 4 9 <----------------------------------------- 22 20 <----------------------------------------- 6 22 <----------------------------------------- 5 23 -----------------------------------------> 23 Of course, all disclaimers apply: the one that is guaranteed to work costs $55.00. --------------------- Bill Chidester "Whatta ya want fer nothin'?" -- E. Blues HP Orlando (407) 826-9228