This needs to be added to your custom.crons:

# Check for if we are in use, for the ID sequence. Every 10 min
*/10 * * * * (/home/irlp/custom/idscript > /dev/null 2>&1)





This needs to be added to /home/irlp/custom in a file called idscript. 
Need to "chmod 750 idscript" after typing it in.




#!/bin/bash
#
# This is a script that will play the ID message over the simplex node while in use.
#
# Revision Log
#
# Version 0: Christian Reynolds, May 25, 2003

# Verison 0.1 Richard Cook, July, 2004

# Added "!" to make only id if NOT in use.
########

# Defines

# System Globals
. /home/irlp/custom/environment

# Make sure we are user repeater!!!
if [ `/usr/bin/whoami` != "repeater" ] ; then
echo This program must be run as user REPEATER!
exit 1
fi

# Check to see if we have a file available
# If the file exists, and is nonzero in size, we sleep and move on
if [ -s /home/irlp/audio/myid.wav ] ;
then usleep 1
else exit 1
fi

# With ! added this script will only id if not in use. 


if [ ! -f /home/irlp/local/active ] ;
then usleep 1
else exit 1
fi

# Check to see if we have a newsline like thing playing. If so,
# We won't be able to ID. Skip out.
if [ -f /home/irlp/local/noid ] ;
then exit 1
fi

if [ "$DTMF_ONOFF_MACROS" = "YES" ] ; then
MACROFILE=macros/custom_off
fi

# Loop if the repeater is busy
while [ TRUE ]
do
if $BIN/cosstate
then
if $BIN/pttstate
then
break
fi
fi
echo -en "\rCOS or PTT is active "
sleep .4
done

# Ok, we are at this point, assuming that the repeater is not locally
# busy.

killall ispeaker
killall ispeaker_PCI
killall sfswrapper

# Start playing the files
# Log the activity to the log file
$BIN/key
sleep .2
if [ -s /home/irlp/audio/myid.wav ] ;
then $BIN/play /home/irlp/audio/myid.wav >/dev/null 2>&1
date >> /home/irlp/log/myid.txt
fi

# Turn on IRLP for normal use
if [ -f "$LOCAL"/active ]; then
"$SCRIPT"/sfswrapper
fi

# Ok, time hang up the repeater
$BIN/unkey

exit 0




Next, need to digitize a wave file called myid.wav and save it in the
/home/irlp/audio folder as the repeater user. Same format as your station on/off wave file, 8bit mono.