AT&T Merlin 820 Service And Maintenance Manual page 41

Trouble on One Voice Terminal
Step 9. On both voice terminals, perform the action that revealed the trouble.
IF
The trouble appears on the voice
terminal on which it first
appeared,
The trouble appears on the voice
terminal that at first did not have
the trouble,
Page 38
THEN
Trouble found. It is caused by
the voice terminal body.
Read the section on Maintenance
Exchange Procedures at the end of
this manual.
Trouble found. It is caused by
the handset cord.
Read the section on Maintenance
Exchange Procedures at the end of
this manual.