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This is a technology that enables IP-based telephone systems with only a single access account can manage many phone numbers. With the conventional SIP procedure, each individual terminal device requires for a phone number has its own account with user name and password. SIP trunking, however, enables with only one account the direct dial-in to many devices, each with its own extension numbers:
- called "SIP-DDI" - and that makes a lot easier.
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