{HEAD ~ The exemplary device} 30 further illustratively includes a display 60 and a plurality of {TAIL ~ control keys} including an “off hook” key 61, an “on hook” key 62, a menu key 63, and a return or escape key 64 
{ HEAD ~ The exemplary device } 30 further illustratively includes a display 60 and a plurality of { TAIL ~ control keys } including an “ off hook ” key 61 , an “ on hook ” key 62 , a menu key 63 , and a return or escape key 64
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH