| A T1 line refers to a specific type of copper or fiber optic telephone line that can carry more data than traditional telephone lines. The T-carrier line, as it is sometimes called, was developed by AT&T Bell Labs for North America and Japan. |
| A T1 line refers to a specific type of copper or fiber optic telephone line that can carry more data than traditional telephone lines. The T-carrier line, as it is sometimes called, was developed by AT&T Bell Labs for North America and Japan. |
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