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What is DISA?
DISA stands for Direct Inward System Access. DISA allows outside callers to call into the PBX and obtain an internal dialtone. The user can then dial out from the PBX as if the call were coming from an internal extension.
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DISA stands for Direct Inward System Access. DISA allows outside callers to call into the PBX and obtain an internal dialtone. The user can then dial out from the PBX as if the call were coming from an internal extension.
...