Appendix N    Trouble shooting and FAQ 
N-6 
 
N.5. TEL 
Problem (P)  Possible cause  Confirmation item 
Communication is impossible 
 
 
 
 
 
 
 
 
 
 
Cable is not connected. 
Check that the main unit or JB and the communication terminal are connected 
correctly.    Check also that the power is supplied. 
Since a secret code type of originating call is set, 
input of a secret code is necessary. 
Check the setting of Secret Code on the [Telephony] screen.    When secret code 
is set to “Enable”, originate a call referring to this Instruction manual. 
Communication is occupied by another port.  Check that communication is not being carried out by another TEL port or ISDN 
port.    Check also that the telephone set is properly on-hooked. 
The # button is not pressed following the 
destination number. 
When origin
ating a call using a TEL port, press the # button following the 
destination dial number. 
If the problem is not solved with above countermeasures, turn OFF and ON the power source of main unit to reboot 
JUE-501/JUE-251. 
Communication is impossible 
with specific destination. 
System failure  Ask your service provider. 
Speed Dial calling and   
Redial calling is impossible. 
Dialing sequence is incorrect.  Speed Dial calling : Speed dial number (2 digits or 3 digits) *# 
Redial calling:00*# 
The line can not be 
disconnected by on-hook 
Turn OFF and ON the power switch of main unit to reboot.