{HEAD ~ Data} that is used to screen or filter incoming calls is programmed into {TAIL ~ a call manager} by the IP telephone system users broadband residential gateway 
{ HEAD ~ Data } that is used to screen or filter incoming calls is programmed into { TAIL ~ a call manager } by the IP telephone system users broadband residential gateway
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH