##1019 [ TX/RX ] No answer from user (user alerted)
Cause
• Cause number #19 (No answer from user
(user alerted)) arrived from the network.
##1020 [ TX/RX ] Subscriber absent
Cause
• Cause number #20 (Subscriber absent) ar-
rived from the network.
Chapter 2: Service Error Codes
Remedy
• Wait a while, and start a communication
once again.
• Print out a communications analysis list,
and analyze it.
• Contact the telephone company or the ex-
change manufacturer to find out the nature
of cause number #19.
Remedy
• Start a communication once again.
• Print out a communications analysis list,
and analyze it.
• Contact the telephone company or the ex-
change manufacturer to find out the nature
of cause number #20.
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