Filter
Top Products
Troubleshooting Guidelines
Error Conditions
5-5
The telephone works properly, except sidetone
DTMF is not heard.
CAUSE: PBX suppresses sidetone
DTMF.
RESOLUTION: On PBX administration,
on the Change-System-Parameters
screen, enable On-Hook Dialing. If the
user has Hands-Free Answer (HFA) and
answers the call on the telephone’s
speakerphone, then switches to the
handset, pressing the dialpad buttons
does not send DTMF tones. This is a
known bug, and the only current
resolution is to disable HFA.
Hands-Free Answer (HFA) is administered but the
telephone did not automatically answer a call.
CAUSE: HFA only works if the
telephone is idle. If a second call comes
into the telephone while the first call is in
progress (including ringing before the
first call is answered), the second call is
ignored.
RESOLUTION: None.
The TFTP application terminates and asks for
registration.
CAUSE: Non-Avaya shareware or
freeware TFTP applications often cease
operating to request registration.
RESOLUTION:
Short-term: Restart the application.
Long-term: Register the product or
replace it with an application that does
not behave this way (for example,
Avaya’s TFTP application).
Table 5-1. Some Error Conditions in Operation of 4600 Series IP Telephones —Continued
Condition Cause/Resolution