Yealink SIP-T19 E2 T4 Series, Руководство администратора

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Administrator’s Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series IP Phones
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noises, the possible reasons could be:

Users are seated too far out of recommended microphone range and sound faint, or are
seated too close to sensitive microphones and cause echo.

Intermittent voice is mainly caused by packet loss, due to network congestion, and jitter,
due to message recombination of transmission or receiving equipment (for example,
timeout handling, retransmission mechanism, buffer under run).

Noisy equipment, such as a computer or a fan, may cause voice interference. Turn off any
noisy equipment.

Line issues can also cause this problem; disconnect the old line and redial the call to ensure
another line may provide better connection.
Why is there no sound when the other party picks up the call?
If the caller and receiver cannot hear anything - there is no sound at all when the other party
picks up the call, the possible reason could be: the phone cannot send the real-time transport
protocol (RTP) streams, in which audio data is transmitted, to the connected call.
Try to disable the 180 ring workaround feature. For more information, refer to 180 Ring
Workaround on page 382 .
Why does the IP phone play the local ringback tone instead of media
when placing a long distance number without plus 0?
Ensure that the 180 ring workaround feature is disabled. For more information, refer to 180 Ring
Workaround on page 382 .
Wi-Fi and Bluetooth Issues
Why is the wireless signal strength low?
Ensure the IP phone and your gateway/ router are within the working range and there is no
obvious interference (walls, doors, and so on.) between them.
Why can’t I connect the Bluetooth device with the IP phone all the time?
Try to delete the registration information of the Bluetooth device on both IP phone and
Bluetooth device, and then pair and connect it again. Contact Yealink field application engineer
and your Bluetooth device manufacturer for more information.
Why the Bluetooth headset affects IP phone’s voice quality
？
You may not experience the best voice quality if you use a Bluetooth headset while the 2.4 GHz
band is enabled or while you are in an environment with many other Bluetooth devices. This
possible loss in voice quality is due to inherent limitations with Bluetooth technology.