Section 6. Repair
6-2
Unable to Access Dial Tone or Answer a Call
1.
Make sure the CARRIER LED is operating correctly (See Step 5 in
Section 5, “Test and Adjustments/Initial Turn-on”).
2.
Check the position of JP6. If not using the Decode Input (p1 pin 6), set JP6
to the B position. (See Step 6 in Section 5, “Installation Procedure”).
3.
Scope U13 pin 12 while transmitting the access code. This pin should go
high with each DTMF digit. If the pin does not follow the DTMF digits,
recheck the DTMF level out of the radio and the receive audio level into the
Model 30 (See Step 1 in Section 5, “Test and Adjustments/Initial Turn-on”).
Intermittently Disconnecting During a Call
1.
Noise on the phone line may false the busy tone detector causing the unit to
disconnect the call. Try disabling the busy tone detector (86#).
2.
If the Disconnect code is only a single character (e.g. “#”), voice audio may
be falsing the DTMF decoder so the unit decodes the DTMF Disconnect
code. Try setting the Disconnect code to several digits (e.g. “#12”), or try
enabling Single Digit Access Code Validation.
Содержание 30 Worldpatch
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