
4. POLARITY REVERSE SIGNAL CONTROL
When onne ting the telephone line terminal to equipment that must not re eive the polarity
reverse signal, install the jumper wire in pla e marked with JP4 in the figure.
Jumper JP4 is not fa tory-preset be ause the polarity reverse signal is set to transmit
from the CH1 or CH2 telephone line terminal.
[Rear]
[Front]
CALL OPERATIONS
(1 )Lift up the handset and onfirm that a dial tone is audible. Dial the desired station number
within 10 se onds.
(2)Repla e the handset when terminating the onversation.
(3)The inter om station's dial key
orresponds to dial key
of the pushphone.
[Example]
Inter om station
Pushphone
(All all paging)
(All all paging)
• Dialing must be ompleted within 10 se onds after lifting up the handset. If in omplete,
no dial signal an be transmitted to the ex hange even when the dial keys are pressed.
Thus, the pushphone annot be used for fun tions su h as all transfer, spee h message,
busy all ba k et . to dial during the onversation.
• When transmitting the DTMF signal during the onversation in onun tion with the TI-20
or TI-600 tie-line unit et ., do not press any button of pushphone. This will lead to
malfu tion of the ex hange.
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