It worked like that:

Route 10 numbers to a registered customer:

Matching Patterns:
$request=^INVITE
To=sip:5555555.@
$regaddr("mycustomer")=(.+)

Deploy Patterns:
$target=%1


Thanks

1. Brekeke Product Name and version: Brekeke SIP Server , Version 2.4.8.6 Standard 2. Java version: 1.6.0_01 3. OS type and the version: Linux 2.6.18-4-686 4. UA (phone), gateway or other hardware/software involved: 5. Select your network pattern from http://www.brekeke-sip.com/bbs/network ...

Looks like the problems was on the sip client.

I am using Sonus Gateway/Softwitch <--> Brekeke SIP Server <--> SIP client

I was using the client 3CX Phone, after switching to X-Lite 4 the problem is gone.

Thanks for your help.

What they let me know is that they are not parsing this a=rtcp:3550 attribute correctly. They think it is due a bug on the running software of their equipment. That bug was fixed in the next software version (In my case I have to stay with the current version). This is the CQ posted in the next ...

1. Brekeke Product Name and version: Brekeke SIP Server , Version 2.4.8.6 Standard 2. Java version: 1.6.0_01 3. OS type and the version: Linux 2.6.18-4-686 4. UA (phone), gateway or other hardware/software involved: 5. Select your network pattern from http://www.brekeke-sip.com/bbs/network ...