home *** CD-ROM | disk | FTP | other *** search
/ NetNews Usenet Archive 1993 #3 / NN_1993_3.iso / spool / comp / dcom / modems / 20153 < prev    next >
Encoding:
Text File  |  1993-01-28  |  5.2 KB  |  109 lines
  1. Newsgroups: comp.dcom.modems
  2. Path: sparky!uunet!ukma!bogus.sura.net!udel!intercon!psinntp!panix!oppedahl
  3. From: oppedahl@panix.com (Carl Oppedahl)
  4. Subject: Re: Zyxel 1496E+ 'ati2' descriptions wanted.
  5. Message-ID: <C1L57H.Drt@panix.com>
  6. Organization: PANIX Public Access Unix, NYC
  7. References: <1k98jsINN5vb@NS1.PeachNet.EDU>
  8. Date: Thu, 28 Jan 1993 22:30:53 GMT
  9. Lines: 98
  10.  
  11. In <1k98jsINN5vb@NS1.PeachNet.EDU> Charles Menser <charles@shadow.peachnet.edu> writes:
  12.  
  13. >Could someone please explain the stats quoted by the ati2 command,
  14. >on the Zyxel 1496E+.
  15.  
  16. >I understand the bytes/octets sent/rcvd, but the rest... ?
  17.  
  18. I was sent the following information:
  19.  
  20. (don't know how accurate it is)
  21.  
  22.               Data flow in error-control mode
  23.  
  24.                                                   +--------------------------+
  25.                                                   |  Strip start, stop bit   |
  26.               DTE (PC)                   RS232    |  Add start, stop bit     |
  27.                 /----\   Chars sent      /----\   |    /----\                |
  28.                 |    |   --------------> |TXD |---|--->|    | -----------\   |
  29.                 \----/  <--------------  |RXD |<--|--- |    |<---------\ |   |
  30.               /--------\ Chars received  |    |   |    |    |          | |   |
  31.               \--------/                 |    |   |    |    |          | |   |
  32.                                          \----/   |    \----/          | |   |
  33.      +--------------------------------------------+                    | |   |
  34.      |                     /-----\                                     | |   |
  35.      |                     |     |                                     | |   |
  36.      |     Blocks received |     |                  Octets received    | |   |
  37.      |   /---------------->|     | ----------------------------->------| |   |
  38.      |   | /-<------------ |     |<-----+------------------------------|-|   |
  39.      |   | | Blocks sent   |     |    | |           Octets sent        | |   |
  40.      |   | |               \-----/    | |                              | |   |
  41.      |   | |               Framing    | | Octets       /----\          | |   |
  42.      |   | |                          | | received     |    |          | |   |
  43.      |   | |                          | \------------->|    | ------>--/ |   |
  44.      |   | |                          \--<------------ |    |<-----------/   |
  45.      |   | |                              Octets sent  |    |                |
  46.      |   | |                                           \----/                |
  47.      |   | |                                        Data Compression         |
  48.      |   | |                                                                 |
  49.      +---+-+-----------------------------------------------------------------+
  50.          | |             /------------------\         Async-to-Sync Conversion
  51.          | \----------->-| Modulation       |
  52.          |               \------------------/
  53.          |
  54.          |
  55.          |                /-----------------\
  56.          \--<-------------| DeModulation    |
  57.                           \-----------------/
  58.  
  59.  
  60.  
  61.  
  62.  
  63.  
  64.        Chars    Datas receive from or send to DTE (PC). They are formated as
  65.                 7,E,1 or 7,O,1 or 8,N,1 etc.
  66.  
  67.        Octets   Datas receive or send to remote modem in error control mode.
  68.                 They are compressed if data compression was enabled.
  69.  
  70.        Block    Framed Octets. They are delimited by the unique bit pattern
  71.                 "01111110" known as a flag.
  72.  
  73.  
  74.  
  75.        Chars Sent         Characters DTE has sent to modem
  76.        Chars Received     Characters modem has sent to DTE
  77.        Octets Sent        Data (bytes) have sent to remote modem
  78.        Octets Received    Data (bytes) have received from remote modem
  79.        Blocks Sent        Blocks have sent to remote modem
  80.        Blocks Received    Blocks have received from remote modem
  81.        Blocks Resent      Blocks have resent due to remote modem request. If
  82.                           there were many Blocks Resent, you may experienced
  83.                           problems on the line or protocol incompatibility.
  84.        Max Outstanding    Maximum blocks received without acknowledge remote modem
  85.        Max Block Size     Maximum octets contain in a block
  86.        Retrains Requested The number of times local modem request retrain
  87.        Link Duration      By minutes
  88.        Retrains Granted   The number of times remote modem request retrain
  89.        T401 Timeouts      For protocol maintainace, modems probably recovered.
  90.        T402 Timeouts      For protocol maintainace, modems probably recovered.
  91.        FCS Errors         Errors in frame (block) checksum. If there were many
  92.                           FCS Errors, you may experienced problems on the line.
  93.        Round Trip Delay   By T (1/2400 sec)
  94.        Xmitter Underrun   For modem's processor power measurement
  95.        Receiver Overrun   For modem's processor power measurement
  96.        Disconnect Reason  Only four reasons areavailable
  97.                           Local Hang Up
  98.                           Remote Hang Up
  99.                           Carrier Lost
  100.                           Resent Expiration (others)
  101.  
  102.  
  103.  
  104. -- 
  105. Carl Oppedahl AA2KW  (intellectual property lawyer)
  106. 30 Rockefeller Plaza
  107. New York, NY  10112-0228
  108. voice 212-408-2578     fax 212-765-2519
  109.