ACFT CLEARED TO LAND ON RWY RELEASED TO GND CTL.

Narrative

SMT XAA; CALLED CABBI (OM) INBND ON A PRACTICE ILS; REQUESTING A FULL STOP. I ASKED WHETHER HE COULD LAND ON RWY 18 TO HOLD SHORT OF RWY 24 FOR LNDG TFC. I TOLD HIM 2930' OF RWY WAS AVAILABLE TO HIM; AND I ISSUED THE WIND; WHICH WAS VERY LIGHT. HE SAID THERE WOULD BE NO PROB. I THEN TOLD HIM TO RPT THE MIDDLE MARKER INBND; STRAIGHT IN FOR RWY 18. I HAD SEVERAL ACFT IN THE PATTERN FOR RWY 24 AND A FEW DEPS. RWY 24 WAS THE DESIGNATED ACTIVE--RWY 18 WAS GND CTL'S JURISDICTION. AS I SAW THE SMT APPROX OVER THE MIDDLE MARKER; I CLRED HIM TO LAND RWY 18 TO HOLD SHORT OF RWY 24; HOWEVER UNFORTUNATELY I USED THE WRONG CALL SIGN CALLING HIM XXB; ANOTHER SMT ON THE FIELD. WHEN HE DID NOT RESPOND; I REPEATED THE CLRNC; AGAIN USING THE WRONG CALL SIGN. ABOUT THAT TIME I NOTICED SMA X XING RWY 18 AT THE RWY 24 PARALLEL TXWY; AND IT WAS THEN THAT I REALIZED I FAILED TO COORDINATE THE RWY 18 LNDG WITH GND CTL. I COULD TELL; HOWEVER; THAT SMA X WOULD BE ACROSS THE RWY BEFORE THE SMT XED THE RWY THRESHOLD. ON VERY SHORT FINAL; THE SMT SAID 'CONFIRM XXX CLRED TO LAND.' I CLRED HIM TO LAND; USING HIS CORRECT CALL SIGN; GIVING HIM THE FULL LENGTH OF THE RWY. THE SMA WAS CLR. AT THAT TIME I BELATEDLY COORDINATED THE RWY 18 LNDG WITH GND CTL. ABOUT 15 MINS LATER I WAS REMOVED FROM POS AND DECERTIFIED; INITIALLY BEING CHARGED WITH COMMITTING A SYS ERROR BECAUSE THE SUPVR DIDN'T BELIEVE SMA X WAS ACROSS THE RWY WHEN THE SMT XED THE THRESHOLD. THAT WAS CHANGED TO AN OPDEV WHEN THE PLT OF SMT XXA CONFIRMED BY TELEPHONE THE RWY WAS CLR WHEN HE XED THE THRESHOLD. THE OPDEV WAS BECAUSE I FAILED TO COORDINATE THE RWY 18 LNDG WITH GND CTL. I WILL READILY ADMIT THIS SITUATION INVOLVED HUMAN ERRORS ON MY PART; BUT ONE OF THE THINGS THAT MAKES THE ATC SYS WORK SO WELL IS REDUNDANCIES. AT CARBONDALE TWR WE HAVE A CAB COORD POS. A CTLR PLUGGED INTO THE CAB COORD POS ASSISTS THE LCL CTLR IN SPOTTING TFC; AND POINTS OUT TO THE CTLR IF HE MAKES A MISTAKE OR OVERLOOKS SOMETHING; SO IT CAN BE CORRECTED BEFORE IT IS TOO LATE. ON THIS DAY; THE SUPVR WAS PLUGGED INTO THE CAB CTLR POS; BUT WAS APPARENTLY NOT TRYING TO HELP ME WORK THE TFC; BUT MERELY MONITORING MY PERFORMANCE. I BELIEVE ALL ATC EMPLOYEES SHOULD BE ON THE SAME TEAM--THAT IS; DOING THE JOB OF ENSURING AIR SAFETY. IN THIS CASE; THE REDUNDANCIES IN THE SYS DIDN'T WORK. THE SUPVR SHOULD HAVE COORDINATED THE RWY 18 LNDG WITH GND CTL; AS I ALSO SHOULD HAVE. WE BOTH FAILED.