Disable Authentication for incoming call from SIP Gateway

1. Brekeke Product Name and version:
2.1.6.6
2. Java version:
1.6
3. OS type and the version:
Windows XP
4. UA (phone), gateway or other hardware/software involved:
SIP trunking
5. Select your network pattern from http://www.brekeke-sip.com/bbs/network/ ... terns.html :
pattern 1
6. Your problem:
Cannot accept incoming call from the SIP server to the Brekeke PBX server.
Try to call into PBX subscriber from a SIP gateway.
SIP GATEWAY --- invite ---> BREKEKE PBX
SIP GATEWAY <--- 100 ---- BREKEKE PBX
SIP GATEWAY <--- 407 ---- BREKEKE PBX
SIP GATEWAY ---- ack ----> BREKEKE PBX
SIP GATEWAY --- invite ---> BREKEKE PBX
SIP GATEWAY <--- 100 ---- BREKEKE PBX
SIP GATEWAY <--- 403 ---- BREKEKE PBX
SIP GATEWAY ---- ack ----> BREKEKE PBX

What do I need to do to disable authentication for incoming call?

Thanks

You can disable authentication in the sip server config screen.