🚀 go-pugleaf

re:  "I just bought a surplus Hewlitt Packard 2627A graphics terminal
      without a communications cable and I would like someone to please tell
      me how it should be wired, i.e.  what signals are on what pins.  The
      port 1 connector has 50 (?)  pins like those on multiline telephones.

Although the HP 2627A is no longer in production (but is available as a
remarketed product), the manuals are still in print, and are:

   02627-90001  Users Manual        $ 38.00
   02627-90002  Reference Manual      25.00
   02627-90003  Service Manual        17.00
    5957-9918   Cabling Manual        17.00

I was surprised at the relatively high price of the "Users" manual until
I checked our library copy.  It is printed in color, which is costly. 

The datacomm pinouts are as follows.  This also describes the HP 13222N U.S.
modem cable, if you substitute a 25-pin male DB25P connector for "Port 2".
Only those lines marked with an asterisk (*) are generally needed for use
with port selectors or retail modems.

   Port 1  Signal      Port 2  Description
   ======  =========== ======  =========================================
    7      DA (TT)     24      Transmitter signal element Timing (DTE)
    9   *  CE (RI)     22      Ring Indicator
   12   *  BA (TxD)     2      Transmitted Data
   13   *  CA (RTS)     4      Request To Send
   14   *  CD (DTR)    20      Data Terminal Ready
   15      SCA (SRTS)  19      Secondary Request To Send
   40      CH/CI (SRS) 23      data Signal Rate Selector
   41      DB (ST)     15      Transmitter signal element Timing (DCE)
   42   *  BB (RxD)     3      Received Data
   43      DD (RT)     17      Receiver signal element Timing
   44   *  CB (CTS)     5      Clear To Send
   45   *  CC (DSR)     6      Data Set Ready
   46   *  CF (CD)      8      Received line signal detector (Carrier Detect)
   47      SCF (SRR)   12      Secondary "CF"
   48   *  AB (GND)     7      Signal Ground

Regards,                                              Hewlett-Packard
Bob Niland                                            3404 East Harmony Road
[ihnp4|hplabs]!hpfcla!rjn                             Fort Collins CO  80525