Categorize common telecommunications identifiers by the job each one performs.
Sort each identifier by the job it performs in a telecom system. Public Telephone Number Enterprise Dialing Identity SIP Service Name Packet or Link Address Subscription or Location Record +442079460100 Direct inward dial number assigned by the carrier Four-digit office extension 7421 Reception hunt group short code sip:reception@example.com sbc01.voice.example.net 10.44.18.25 assigned to a phone Device MAC address printed on the handset label Mobile subscription identifier used inside the carrier network Emergency location record for a DID
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