Public Network: Did System - Nortel BCM50 Configuration Manual

290 Chapter 30 Public networking: Setting up basic systems
Programming:
Lines
• Set lines to manual answer.
• Configure into a line pool.
Telephones
• Line pools are assigned to general office telephones.
• The Prime line is set to the line pool.
• Lines are assigned individually and as a line pool to the central answer position (set to appear
and ring).

Public network: DID system

Direct Inward Dialing (DID): A call is received over the DID circuit (for example, PRI) and is
preceded by a packet of information (Receive Digits) containing the number that was dialed. The
BCM decodes this information and routes the call to the extension that has been programmed with
the designated Target Line. The benefit to the customer is a pooled access group for incoming calls
so that dedicated lines are not required to be terminated on the system for each user.
This setup allows you to assign a dedicated phone number to each telephone. The CO assigns a list
of available numbers for each DID line. You can change your DN range to match these numbers,
or you can use target lines to match each number with a DN.
Figure 93 illustrates an example of a DID system.
NN40020-603 NN40020-603