; 1993-97 SDF AT&T 3B Network Configurations


            [14.4kbps] [14.4kbps] [14.4kbps]  
 *[adaptex] [14.4kbps] [14.4kbps] [14.4kbps]
 *[egsner]  [14.4kbps] [14.4kbps] [14.4kbps]
     ||           \\\     |||        |||
     ||            \\\    |||        |||
   eports           -----eports     eports
 -------------------   -------------------
| === | 3b2/400     | | === | 3b2/400     |
|_____|_____________| |_____|_____________|
|    ;| 'news'    ..| |    ;| 'sdf'     ..|
 -------------------   -------------------
   |              \________________________\
   |               |      1mb/s starlan
   |               |           rfs
  -------------------  
 |    ;| 3b2/310   ..|            --------
  -------------------            | unixpc |
  /      'minmei'                |  7300  |
 |    (layers server)            |'mapcar'|
 |                              __--------_
 |        --------             \            \ 
 |       |        |            \\____________\
 |       ||       |            
 |       |        |            
 |       |        |            
 |       |       ||            
  \      |        |
   |      -------- , 
 [abc]   __|____|__ `,  ___
  box   /          \ `~(...)
       /____________\
          tty 5620
           syscon

  * 'egsner' and 'adaptex' brought in email and usenet
    news respectively.  both ran connections at 19.2kbps
    using telebit's PEP (packetised ensemble protocol)

 ... in 1996 lucent technologies donated a 3b2/522.  
     adaptex stopped feeding news and dialups were cut.
     the configuration went from that above to this:

         -------------------
        |                   |
        |                 xm|
         -------------------
         -------------------  
        | === | 3b2/522     |	
        |_____|_____________|---------- 
        |    ;| 'sdf'     ..|    \ \ \ \
         -------------------     [modems]