Vos3000 sip default port is 5060 and 6060
The rc4 is 5070(the encryption is defined by linknat.com)
You can modify the mbx3000 config file to add the register port
by editing “/home/kunshi/mbx3000/etc/softswitch.conf ”

nano /home/kunshi/mbx3000/etc/softswitch.conf

SS_NAME=”MBX3000″
SS_H323_RAS_PORT=”1719″
SS_H323_RC4_RAS_PORT=”3719″
SS_H323_SIGNAL_PORT=”1720″
SS_H323_RC4_SIGNAL_PORT=”3720″
SS_SIP_PORT=”5060,6060”
SS_SIP_RC4_PORT=”5070″

Add the ports and save and exit

Now restart the mbx services

/etc/init.d/mbx3000d reload

now check the new ports which you have added

netstat -anp|grep “port number” (you added)