I want to send SD (720x576 PAL) signal from one TV station to the 10 receiving set-top boxes in other cities.

I want to buy Aminet A129 set-top boxes and use Wowza Media Server. Does anyone know:

1. Which lowcost DVBoverIP H.264 encoder can be used for this purpose, and what protocol set-top boxes used to receive the signal (TCP/IP, UDP, Multicast, DHCP, SMTP, HTTP, SNMP, RTP or RTSP) ?
2. Which Wowza Media Server package do I need to buy for those 10 set-top boxes ?

Thanks in advance
Vladimir Petrovic