IF the Siemens doesn't support Multicast, your nextoption would be to set the IPTV system to "smallcast" to your target address. Smallcast is a unicast to get through infrastructure that doesn't support multicast.
You may be able to do a VPN, but many VPNs (if I'm recalling correctly) don't suport multicast.
Smallcast should work.
Good Luck
Scott