Telcobridges - Session Border Controllers
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Can't transfer extension

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Can't transfer extension Empty Can't transfer extension

Post by cheng514 Thu Oct 22, 2020 9:55 pm

I was testing the sip trunk function of FREESBC recently. The inbound and outbound functions of the direct line call are normal, but when I switch from the automatic switchboard to the extension, it will automatically hang up.
After capturing the packet, the analysis is that after the DTMB key dialing information is not forwarded'invite' to the operator, the call cannot be established normally, and the internal device actively hangs up.
I also tried to modify the settings in Call Transfer Options, but it still doesn't seem to improve the results.



Number of Messages : 2
Point : 4
Registration Date : 2020-10-22

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Can't transfer extension Empty Re: Can't transfer extension

Post by William Wong Thu Oct 22, 2020 11:01 pm

Hi Cheng514,

For this kind of issue which may involve further investigation, I suggest you considering our ProSBC package.

I also see you had sent us email about this topic, I would reply the same to you.

Best regards,


William Wong

Number of Messages : 8
Point : 8
Registration Date : 2017-11-30

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