term% ls -F
term% cat index.txt
TELCO(4)                   Kernel Interfaces Manual                   TELCO(4)

       telco, faxreceive, faxsend, fax, telcofax, telcodata - telephone dialer

       telco [ -p ] [ -i source-id ] [ -v ] dialer-devs

       aux/faxsend address page1 ...

       aux/faxreceive [ -s spool-dir ] [ -v ]

       fax [ -v ] telno recipient [ files ]



       Telco is a file server that provides a network interface to Hayes tele‐
       phone dialers.  The interface is the same as that provided by ip(3) and
       can be used  by  any  program  that  makes  network  connections  using
       dial(2).  The network addresses used by telco are telephone numbers.

       The options are

       -p     use pulse dialing

       -v     verbose:  write  to the log file all communications with the di‐

       -i     specify a source-id to be used during FAX transfers

       Some control of outgoing calls can be encoded  in  the  address.   Nor‐
       mally,  addresses are of the form telco!number, where number is a deci‐
       mal telephone number.  However, commas in the telephone number  can  be
       used  to  insert pauses in the dialing process.  Dialing options can be
       added to the end of the address, separated by !'s.  The dialing options

              turn on compression (default off)

              a  decimal  number representing the highest baud rate with which
              to make the call

       fax    to make a Class 2 facsimile  call  (used  by  programs  such  as

       Telco  also  answers  incoming calls.  Upon receiving a facsimile call,
       telco starts the script /rc/bin/service/telcofax.  For  data  calls  it
       starts  /rc/bin/service/telcodata.   Each  is  started with the network
       connection as both standard input and standard output and with two  ar‐
       guments,   the   file   name   of   the   network   connection,   e.g.,
       /net/telco/0/data, and the type of modem.  Currently,  the  only  modem
       types supported are:

       MT1432 Multitech's 14400 baud modem

       MT2834 Multitech's 28800 baud modem

              the 14400 baud modem in Safaris

       VOCAL  the 14400 baud Vocal modem

       All  other  modems are assumed to be compatible with the standard Hayes
       command subset.

       Faxreceive is normally started by /rc/bin/service/telcofax.   It  reads
       and spools a CCITT Group 3 (G3) encoded FAX, and then starts the script
       /sys/lib/fax/receiverc, passing it four arguments: the spool file name,
       Y  (for success) or N, the number of pages, and the id string passed by
       the caller.  This script sends by mail(1) notification to a list of re‐
       cipients  kept in the file /mail/faxqueue/faxrecipients; the script and
       the list should be edited to match local needs.   Faxreceive's  options

       -s     specify   a   different   spool   directory;   the   default  is

       -v     verbose: write to the log file all communications with  the  mo‐

       Faxsend  transmits a FAX to address.  Page1 and all arguments that fol‐
       low are names of files containing G3 encoded FAX images, one per page.

       Fax is a shell script that converts to G3 format PostScript, G3,  text,
       or  other  files acceptable to lp(1) and queues the result to be trans‐
       mitted to  a  FAX  machine.   A  standard  cover  sheet,  derived  from
       /sys/lib/fax/,  is  sent before the message.  Telno is the destina‐
       tion telephone number.  Recipient is the name of the  recipient  to  be
       placed  on  the cover sheet.  If no files are specified, standard input
       is converted and sent.  The -v option invokes page(1) on the  generated
       G3 files instead of transmitting them via FAX machine.

       Start the dialer on a PC, then use con to phone out.

              telco /dev/eia1
              con -l telco!18005551212

       The  connection  will  be made at the highest negotiable baud rate.  To
       use the best negotiable compression scheme as well:

              con -l telco!18005551212!compress



       con(1), ip(3)

       These programs require the Class 2  facsimile  interface.   This  means
       that  faxsend  and  faxreceive will not work on most portable computers
       since they have Class 1 interfaces.

       The modem specific information is  currently  built  into  the  source.
       This should be in a user modifiable file.