THE RPTING FLC WAS TOLD THAT A POSSIBLE OPERATIONAL DEV OCCURRED BECAUSE THEY ACCEPTED A CLRNC THAT THE CTLR MEANT FOR ANOTHER COMPANY FLT. THE FLC HAD RECEIVED A XING RESTR WHICH THEY HAD REQUESTED RELIEF FROM; AND THEN THOUGHT THAT THEY HAD HEARD AND READ BACK AN AMENDED CLRNC FOR A LATER XING RESTR.

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WHILE IN THE ARR PHASE OF OUR SFO-ORD FLT (FL240; 260 KTS ASSIGNED; 28 DME W OF JVL VOR); ORD CTR CLRED US TO CROSS JVL VOR AT 16000 FT AND 210 KTS. WE ACCEPTED THAT CLRNC AND READ IT BACK ACCORDINGLY. BECAUSE OF OUR DISTANCE FROM THE JVL VOR; WE DECIDED IT WOULD HAVE BEEN DIFFICULT TO COMPLY WITH BOTH ALT AND SPD REQUESTS; SO I; THE PNF; ASKED ORD; 'CHICAGO ACR ABC; DO YOU NEED THE ALT OR THE SPD OVER JVL? IT WILL BE TOO TIGHT FOR BOTH.' IN RESPONSE; ORD CTR REPLIED; 'ACR ABC; JUST CROSS TEDDY AT 10000 FT AND THEN SLOW TO 250 KTS' AT WHICH TIME MY READBACK WOULD HAVE BEEN 'ACR ABC; CROSS TEDDY AT 10000 FT; THEN 250 KTS.' ALL 3 OF THESE XMISSIONS APPEARED UNGARBLED AND CLR; AND AT NO TIME WAS THERE NOTICEABLE RADIO SQUEALING; STATIC; OR APPARENT BLOCKS. WHILE IN OUR DSCNT THROUGH 13500 FT; ORD CTR INSTRUCTED US TO LEVEL OFF AT 14000 FT. I REPLIED THAT WE WOULD CLB BACK UP TO AND MAINTAIN 14000 FT. SHORTLY THEREAFTER; WE WERE ALSO INSTRUCTED TO TURN TO A NORTHERLY HDG. PRIOR TO OUR HDOF TO ORD APCH; ORD CTR REQUESTED US TO CALL THEM ON THE TELEPHONE UPON ARR AS WE 'MAY HAVE BEEN INVOLVED IN A POSSIBLE OPERATIONAL DEV.' FORTUNATELY OUR VOICE RECORDER COULD HAVE VERY CLOSELY VERIFIED THE ACCOUNTS OF THIS EPISODE AS I HAVE STATED ABOVE. UNFORTUNATELY; WE NO LONGER HAVE ACCESS TO THESE RECORDINGS AND ORD CTR MAINTAINS THE XMISSIONS WERE 'GARBLED' OR 'STEPPED ON' OR THAT WE RECEIVED A CLRNC MEANT FOR ANOTHER COMPANY FLT (WHILE IN OUR DSCNT AFTER RECEIVING OUR CLRNC TO CROSS TEDDY AT 10000 FT THEN 250 KTS; WE DID HEAR THE SAME CLRNC BEING GIVEN TO COMPANY FLT NUMBER DEFG). TWO WAY COM DICTATES THAT IF THERE IS CONFUSION AT ANY TIME; FURTHER COM IS REQUIRED TO CLARIFY THE SIT. WHY WASN'T MY READBACK OF 'TEDDY AT 10000 FT THEN 250 KTS' RECTIFIED IF IT INDEED WAS FOR ANOTHER ACFT (AND I MUST ADD THAT IT WAS IN REPLY TO MY REQUEST FOR ALT AND OR SPD RELIEF TO OVERHEADING JVL ORD)? SUPPLEMENTAL INFO FROM ACN 332487: THE READBACK FOR MUTUAL VERIFICATION SHOULD BE A PLT AND CTLR'S RESPONSIBILITY FOR EFFECTIVE 2-WAY COM.