Yealink SIP-T19 E2 — решение проблем с IP-телефонами: советы и рекомендации [751/841]

Troubleshooting

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 Ensure that the target firmware is applicable to the IP phone model.

 Ensure that the current or the target firmware is not protected.

 Ensure that the power is on and the network is available in the process of

upgrading.

 Ensure that the web browser is not closed or refreshed when upgrading firmware

via web user interface.

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Check if the IP phone is configured to obtain the time and date from the NTP server

automatically. If your phone is unable to access the NTP server, configure the time and

date manually.

If you have poor sound quality/acoustics like intermittent voice, low volume, echo or

other 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 (e.g.,

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.

A remote phone book is placed on a server, while a local phone book is placed on the

IP phone flash. A remote phone book can be used by everyone that can access the

server, while a local phone book can only be used by a specific phone. A remote phone

book is always used as a central phone book for a company; each employee can load

it to obtain the real-time data from the same server.