Figure 3-2. Nontandem Tie-Trunk Network; Direct Inward Dialing (Did) Lines/Trunks - AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual

Lines and Trunks

Figure 3-2. Nontandem Tie-Trunk Network

Direct Inward Dialing (DID)
Lines/Trunks
Direct Inward Dialing (DID) trunks allow incoming calls to reach specific
individuals or facilities in the system without the assistance of a system
operator. DID trunks are available only in the Hybrid/PBX mode. They are
connected to the system on an 800 DID module or through DID-emulated
channels on a 100D DS1 module.
For Release 2.0, DID functionality has been extended to DID-administered B-
channels in the DS1 circuit board in T1 mode. B-channels administered for DID
operation behave like tie trunks to the network and like DID trunks to the system
switch.

Direct Inward Dialing (DID) Lines/Trunks

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