DISA alow you access resources into your PBX. When you dial a public number and this number is autoterminated in the DISA DN, you get a dial tone. Then depend of the setting for you number DISA, you can made internal, local and international calls trought the Meridian PBX.
disa in direct inward system access.. you dial in on a did, get auto answer, enter a password and get dialtone back out of the pbx, the only known use for disa is toll fraud.. i have used it years ago where the owner of a company wanted access to out watts from the house... worked great he had access for years, (so did i)
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