09-09-2012
If the sockets are both RJ11 I assume that both expect to be connected to a phone line and "hear" a dial tone when they connect to the "line".
You don't say what country you are in but modems can have variable standards. You need to know that they are both the same.
Can you connect both devices to real phone lines or on extensions of a PBX that uses POTS phones? Then dial the other number or extension number. With appropriate AT commands you can set one to auto-answer and the other to dial the number (or extension number) of the other.
How much data do you want to transfer? Too much to make a public network phone call to do it?
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LEARN ABOUT CENTOS
phones
phones(4) File Formats phones(4)
NAME
phones - remote host phone number database
SYNOPSIS
/etc/phones
DESCRIPTION
The file /etc/phones contains the system-wide private phone numbers for the tip(1) program. /etc/phones is normally unreadable, and so may
contain privileged information. The format of /etc/phones is a series of lines of the form:
<system-name>[ ]*<phone-number>.
The system name is one of those defined in the remote(4) file and the phone number is constructed from [0123456789-=*%]. The `=' and `*'
characters are indicators to the auto call units to pause and wait for a second dial tone (when going through an exchange). The `=' is
required by the DF02-AC and the `*' is required by the BIZCOMP 1030.
Comment lines are lines containing a `#' sign in the first column of the line.
Only one phone number per line is permitted. However, if more than one line in the file contains the same system name tip(1) will attempt
to dial each one in turn, until it establishes a connection.
FILES
/etc/phones
SEE ALSO
tip(1), remote(4)
SunOS 5.10 14 Jan 1992 phones(4)