Get P-SBC-Error when client register to sbcos

[xiexin0606]

Hi, we would like to use the sbcos, but when the softphone register to it, we get the error as below:

SIP/2.0 500 Service not available
Via: SIP/2.0/UDP 192.168.1.47:8440;branch=z9hG4bK-524287-1---a5d586273e2c625d;rport=8440;received=192.168.1.47
To: <sip:11111@192.168.1.4>;tag=221e192f9bab43739afcb90db051aeca.7d7b
From: <sip:11111@192.168.1.4>;tag=8175241c
Call-ID: LPY1kworjeeqqF8T4G0X-w..
CSeq: 1 REGISTER
P-SBC-Error: B-Trunk access
Server: SBC-OS
Content-Length: 0

Does there have any guides we can learn?

Thanks

[adubovikov]

you didn't add IP to the mapping.

[xiexin0606]

you didn't add IP to the mapping.

Thanks, do you mean to add the PBX IP to the mapping or add the client IP Phone IP to the mapping?
Can we pay for the user guide?

Thanks

[adubovikov]

https://github.com/voiceboys/sbcOS/blob/master/DOC/REGISTRATION_TRUNK

[xiexin0606]

We have read that, but didn't understand :), since we new to sbc-os and kamilaio.