Can You Solve this Telecommunications Crossword?

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Across
  1. 2. A demarcation point
  2. 4. Regulatory Body
  3. 6. A HV hazard type
  4. 9. A safe voltage range
  5. 10. A type of functional earth
  6. 12. A type of network boundary
  7. 14. A form of electrical interference
  8. 15. A hard type of conduit
Down
  1. 1. A type of electrical signal
  2. 2. Who compiles the mandatory standards
  3. 3. Connection point for customer equipment
  4. 5. A type of network boundary
  5. 7. A carrier’s (integrated) service data network
  6. 8. A compound used for conduits
  7. 11. Relates to step potential
  8. 13. A type of functional earth