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Full Discussion: A Modem Dailer
Top Forums Programming A Modem Dailer Post 12625 by S.P.Prasad on Friday 4th of January 2002 03:22:27 AM
Old 01-04-2002
A Modem Dailer
I am trying to write a Modem Dialer Software on SCO unix platform. I have successfully opened /dev/tty1A port and made following port setings
[Server Side]
Input Mode = 0 ( None )
OutPut Mode = 0 ( None )
Hardware Control Mode = 8 Bits , Enable Receiver , Drop DTR when application terminates , Bi-Direction Flow Control
Disable Special Control Characters except START, STOP , VMIN , VTIME

I have successfully got a response from Modem as "OK" for both "AT" & "ATZ" commands. I have connected the Modem to my intercom line. At an other PC i am running the client software which has the same setup for port /dev/tty2A as of Server and a Modem connected at its end which in turn is connected to the intercom line

I am completely unable to transfer data from Server/Client to Clinet/Server PC. When I write "ATD phone_numberW\r" command at the client side , I am able to trace "RING" event at Server side. But after that the code goes for a toss stating at client side "NO DIALTONE" or "BUSY" or "HANGUP".

Kindly guide me the Know how of modem Programming stating
1) How to detect what Modem Make I am using?
2)What is the generic Modem Init strings?
3)What are the sequences of Command to be intiated from Client and Server side to Modem and what will be the EXPECTED responses ?
4) Are my port settings correct ?
5) How can I transfer data from PC to PC using Modems at both ends.
 

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LEARN ABOUT DEBIAN

jacktrip

JACKTRIP(1)							   User Commands						       JACKTRIP(1)

NAME

       JackTrip - manual page for JackTrip VERSION: 1.0.5

SYNOPSIS

       jacktrip [-s|-c host] [options]

DESCRIPTION

       JackTrip:  A  System  for High-Quality Audio Network Performance over the Internet Copyright (C) 2008-2009 Juan-Pablo Caceres, Chris Chafe.
       SoundWIRE group at CCRMA, Stanford University VERSION: 1.0.5 -----------------------------------------------------------------------------

OPTIONS

       -s, --server
	      Run in Server Mode

       -c, --client
	      <peer_host_IP_number>  Run in Client Mode

       -n, --numchannels #
	      Number of Input and Output Channels (default 2)

       -q, --queue
	      # (1 or more)	     Queue Buffer Length, in Packet Size (default 4)

       -r, --redundancy
	      # (1 or more)	     Packet Redundancy to avoid glitches with packet losses (defaul 1)

       -o, --portoffset
	      # 		     Receiving port offset from base port 4464

       -b, --bitres
	      # (8, 16, 24, 32)      Audio Bit Rate Resolutions (default 16)

       -z, --zerounderrun
	      Set buffer to zeros when underrun occurs (defaults to wavetable)

       -l, --loopback
	      Run in Loop-Back Mode

       -j, --jamlink
	      Run in JamLink Mode (Connect to a JamLink Box)

       --clientname
	      Change default client name (default is JackTrip)

       -v, --version
	      Prints Version Number

       -h, --help
	      Prints this Help

COPYRIGHT

       Copyright (C) 2008-2009 Juan-Pablo Caceres, Chris Chafe.  SoundWIRE group at CCRMA, Stanford University

JackTrip VERSION: 1.0.5 					   November 2010						       JACKTRIP(1)
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