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outgoing Calls disconnection after every 3 seconds

Publication Date:  2017-08-23 Views:  504 Downloads:  0

Issue Description

user has upgraded the u1910 to V200R003C20SPC900 and after upgrade all outgoing calls through the AT0 trunk dropped after 3 second 

Handling Process

- confirm that all used AT0 trunk are active and calls are working fine when connecting the AT0 trunk direct to analog phone without connecting the pbx 

- review the used dial and busy tone parameters and confirm its ok by comaring with different sites uses AT0 on the same country 

- collecting the call logs using ssh during test the same affected call

Root Cause

 the root cause why the outgoing call disconnected is the U1910 incorrectly detects the peer signal as a congestion tone( once the U1910 detect a congestion tone , the call will be disconnected )


1-   adjust the configuration of the congestion tone of U1910.

3- Choose the congestion tone which are configured on this U1910 site.

Then click automatic detection to adjust the parameter of the congestion tone.