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Fixed Telephony Digital Line E1

DDR DIGITAL AND ACCESS DIGITAL – Direct Inward Dialing , provides extensions that act as a personalized direct line , without the need of operators.


· It is necessary for the PBX and Phone System have software and hardware adapted for the use of DDR service.
· The Telephone Exchanges must be digital technology.
· Marketed in groups of circuit breakers 30 through a 2Mbps access.