E135 CREW STOPPED ON THE HIGH SPD TXWY K4 TO CLARIFY A CONFUSING TAXI CLRNC. THIS INVOLVED A COMPANY RAMP CTLR GIVING TAXI INSTRUCTIONS ON A DESIGNATED ARPT TXWY AT PHL.

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TAXI PROB PHL. LEAVING RWY PHL RWY 27R WE EXITED AT K4. TOLD BY LCL TO TURN L ON TXWY K; R TA RAMP SPOT X. CALLED RAMP CTLR AND HE SAID GND WANTED US TO KEEP GOING ON TXWY K. WENT BACK TO GND. AIRBUS A320 BLOCKING RTE. TALKED TO GND AND CONTINUED ON TXWY K. CONFUSION OVER EXACT TAXI INSTRUCTIONS AND WHO IS CTLING. K4 HIGH SPD WAS BLOCKED BY US FOR A SHORT TIME WHILE WE MADE SURE OF TAXI INSTRUCTIONS. RAMP CTLR ASKED US TO CALL FAA TWR ON LAND LINE. I DID AND WE DISCUSSED SPOTS AND RAMP TAXI PROCS. SUPPLEMENTAL INFO FROM ACN 589472: AFTER LNDG PHL RWY 27R EXIT K4 WE WERE TOLD BY TWR TO TURN L TXWY K; R TA RAMP SPOT X. WE CALLED RAMP CTL AND THEY TOLD US TO CONTINUE ON TXWY K AND CONTACT GND. WHEN WE TRIED TO CONTINUE THERE WAS AN AIRBUS BLOCKING THAT HAD JUST CLRED THE RWY. WE WERE CONFUSED ABOUT THE INSTRUCTIONS AND WHERE TO TURN. WE TURNED AT TXWY K TO JOIN THE END OF THE LINE GOING TO TERMINALS AND CALLED RAMP AGAIN. RAMP INFORMED US TO CALL FAA VIA TELEPHONE WHEN WE WERE ESTABLISHED INBOUND. WE WERE TOLD THAT WE CAUSED UNNECESSARY CONGESTION BY STOPPING FOR CLARIFICATION.