Voice gateway 232 may be router based and include one or more voice feature cards and {HEAD ~ DSP Module cards} to perform {TAIL ~ voice processing} 
Voice gateway 232 may be router based and include one or more voice feature cards and { HEAD ~ DSP Module cards } to perform { TAIL ~ voice processing }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL