Sharp UP-700 Quick Reference Manual page 10

COMMON CREDIT CARD ERRORS
"COMM ERROR"
CHECK POWER ON DATACAP DATATRAN(RED LABEL)
CHECK INTERFACE CABLE CONNECTING REGISTER TO DATATRAN(BLUE
LABEL)
"NO DIAL TONE"
CHECK PHONE LINE CONNECTION TO DATACAP DATATRAN
CREDIT CARDS RUNNING SLOW (HIGH SPEED INSTALLS ONLY)
CHECK POWER ON DATACAP DATATRAN (RED LABEL)
CHECK INTERFACE CABLE CONNECTING DATATRAN TO IPTRAN (WHITE &
YELLOW LABELS)
CHECK INTERNET CONNECTION TO IPTRAN (GREEN LABEL)
DISCONNECT POWER (RED LABEL) ON IPTRAN FOR 30 SECONDS
RECONNECT POWER ON IPTRAN