pouvez vous svp m'expliquer quelque lignes de ce code ?

#!/bin/bash
# Date
name_file=$$.txt

echo "
Channel: Local/$1@$context
MaxRetries: 0
RetryTime: 60
WaitTime: 30
Context: outgoing
Extension: 800
Priority: 1
Set: Mavariable=$2"> /tmp/tmpcallme/$name_file <

/bin/chmod 777 /tmp/tmpcallme/$name_file
/bin/cp -a /tmp/tmpcallme/$name_file /var/spool/asterisk/outgoing
/bin/rm -f /tmp/tmpcallme/$name_file <