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The Maritime Telegraph and Telephone Company (MT&T, later MTT) was founded around 1910 in Halifax, Nova Scotia and provided telecommunications solutions to Nova Scotia until 1998 when it merged with the Island Telephone Company, NBTel, and NewTel Communications to form Aliant (now Bell Aliant).
Many payphones in Nova Scotia still display MTT branding.
References
Maritime Telegraph and Telephone Company Wikipedia(Text) CC BY-SA