DID
The Wiki of Unify contains information on clients and devices, communications systems and unified communications. - Unify GmbH & Co. KG is a Trademark Licensee of Siemens AG.
DID = Direct Inward Dialling
Explanation
Subscribers of a telephone system can be directly reached from the external network by an individual number. This number consists of a common part and the internal part which may have 1 or more digits.
