CLRNC DELIVERY TRANSPOSES CALL SIGNS AND ISSUES WRONG CLNRC AND MISSES ALT READBACK ERROR. SIT WAS RESOLVED BY THE RELIEVING CLRNC DELIVERY AND THE LCL-GND CTLR WHO WITNESSED THE ERRORS. VIOLATION OF FACILITY PHONE USAGE POLICY. DISTR.

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ACR X CALLED CLRNC DELIVERY FOR IFR TO ORD. CLRNC DELIVERY SPECIALIST WAS ON TELEPHONE; CONVERSING ABOUT AN AUTO INSURANCE CLAIM. ACR X FILED DIRECT ORD AND 14000 FT; ACR X USED THE FULL CALL SIGN ON INITIAL CONTACT. CLRNC DELIVERY SPECIALIST ASSUMED THAT ACR Y CALLED FOR IFR TO ORD (ALSO PROPOSED). SHE TOLD ACR Y THAT SHE HAD AN XYZ AND WAS THAT HIM. ACR X INSISTED THAT HE WAS INDEED ABC. CLRNC DELIVERY SPECIALIST CHANGED ACR X'S FLT PLAN TO READ ABC AND ISSUED THE IFR CLRNC TO ACR X ASSUMING THAT IT WAS ACR Y TO ORD 'AS FILED' TO MAINTAIN 3000 FT AND EXPECT 8000 FT WITHIN 10 MINS. ACR X READ BACK THE CLRNC TO MAINTAIN 2000 FT AND EXPECT 8000 FT WITHIN 10 MINS. THE READBACK ERROR WAS NOT CAUGHT BY CLRNC DELIVERY. (MVA AT ARPT IS 2500 FT.) LCL CTL AND GND CTL SPECIALIST ADVISED THE CLRNC DELIVERY SPECIALIST THAT THE PLT HAD READ BACK 2000 FT IN ERROR. THE CLRNC DELIVERY SPECIALIST EITHER DIDN'T HEAR OR IGNORED LCL CTL AND GND CTL AND WENT BACK TO THE OUTSIDE PHONE CONVERSATION WITH THE INSURANCE AGENT. THE CLRNC (RTE) ISSUED TO ACR X SHOULD HAVE REFLECTED A STAR OR PROPER ROUTING AS PER PERTINENT LOAS. THE RTE ISSUED 'AS FILED' WAS DIRECT ORD. THE SIT WAS RESOLVED BY THE SUCCEEDING CLRNC DELIVERY SPECIALIST AND THE LCL CTL AND GND CTL SPECIALIST WHO WITNESSED THE ERRORS. I BELIEVE THAT THE INCORRECT ROUTING; ALT ISSUED; READBACK; AND THE TRANSPOSED CALL SIGN WOULD NOT HAVE HAPPENED IF THE CLRNC DELIVERY SPECIALIST ISSUING THE CLRNC HAD NOT BEEN DISTRACTED (VOLUNTARILY) BY MAKING OUTSIDE TELEPHONE CALLS FOR PERSONAL BUSINESS WHILE ASSIGNED AN ATC POS OF OP; IN VIOLATION OF FACILITY TELEPHONE USAGE POLICY.