Network Working Group                                         S. Chipman
Request for Comments: 667                                      BBN-TENEX
NIC: 31422                                                 December 1974

                                Host Ports

   The following is the approved scheme to connect our computers to the
   network.  This configuration will become effective December 18, 1974.

    __________________
   | PDP-11           |
   | SPEECH FRONT END |________
   | 50.=62(8)        |      __|_________
   |__________________|     |            |
    __________________      |   IMP-50   |________\ NCC-TIP
   | PDP-10           |     |____________|        /
   | SYSTEM D         |________|   |   |
   | 114.=162(8)      |            |   |
   |__________________|            |   |________________________
    __________________             |                            |
   | PDP-10           |            |                            |
   | SYSTEM A         |________    |                            |
   | 197.=305(8)      |        |   |                            |
   |__________________|        |   |                            |
    __________________       __|___|_____                       |
   | PDP-11           |     |            |                      |
   | LPT              |_____|   IMP-5    |________\ CCA         |
   | 69.=105(8)       |     |____________|        /             |
   |__________________|        |   |                            |
    __________________         |   |                            |
   | PDP-11           |        |   |                            |
   | PACKET RADIO     |________|   |                            |
   | 133.=205(8)      |            |                            |
   |__________________|            |                            |
    __________________             |    ________________________|
   | PDP-10           |            |   |
   | SYSTEM B         |________    |   |
   | 49.=61(8)        |      __|___|___|_       ____________
   |__________________|     |     49     |_____|    161     |
    __________________      | BBN10X-TIP | VDH | ANALOG TIP |  Local
   | PDP-10           |     |____________|     |____________|  Terminals
   | SYSTEM C         |________|
   | 241.=361(8)      |
   |__________________|

   All host interfaces are local (except host number 005 which is an
   easily convertible local/distant interface and we have been asked by
   Div 6 to avoid using it so Div 6 can more easily check out PDP-10 IMP
   interfaces).  The PDP-11 with the line printer is intentionally on
   host 105 so that a simple minded program can respond when someone
   tries to ICP to its logger socket "To login to BBN (System C) use
   host number 241(10)".

         [ This RFC was put into machine readable form for entry ]
         [ into the online RFC archives by Alex McKenzie with    ]
         [ support from GTE, formerly BBN Corp.           2/2000 ]