21. Mexico has countered with complaints about U . S . carriers misusing leased lines . 22. Other companies are being forced to delay new services, because leased lines are too expensive. 23. Continental will provide countywide telephone service by supplementing its existing cable networks with leased lines . 24. They only offer guarantees for dedicated or leased lines . 25. More commonly, this is in the form of regular telephone lines, ISDN or leased lines . 26. This is in contrast to purchasing bandwidth or leased line capacity on an existing network. 27. "After the satellite service is operating we will still provide services through the leased line . 28. It is less expensive than leased lines and that is one reason for its popularity. 29. Revenue from leased lines fell to 4.469 billion yen from 4.875 billion yen a year earlier. 30. Calling cards, cellular roaming and liberalised leased lines within the regulatory frameworks of the member states.