Two-Way Did; Dialing Plan And Pri - Nortel BCM50 2.0 Installation Manual

• The OLI digits for each set should be identical to the DID dialed digits for the set.
• The routing table should route 911 to a PRI line pool.
• If attendant notification is required, the routing table must be set up for all 911 calls to use a
dedicated line which has an appearance on the attendant console.
• The actual digit string 911 is not hard-coded into the system. More than one emergency
number can be supported.
If transmission of internal extension numbers is not required or desired, then it is recommended
that the person in charge of the system maintain a site map or location directory that allows
emergency personnel to rapidly locate a BCM50 set given its DID number. This list should be kept
up to date and readily available.
IP telephony note: Ensure that you do not apply a 911 route to an IP telephone that is off the
premises where the PSAP is connected to the system.

Two-way DID

With PRI the same lines can be used for receiving direct inward dialing (DID) and for making
direct outward dialing (DOD) calls.
The dialing plan configured by your customer service representative determines how calls are
routed. Consult your customer service representative to determine whether or not this feature is
compatible with your service provider.
Note: For information on adding integrated lines on an integrated router,
refer to the integrated router documentation.

Dialing plan and PRI

The Dialing Plan supports PRI connectivity to public and private networks. The dialing plan is a
collection of features responsible for processing and routing incoming and outgoing calls. All PRI
calls must go through a dialing plan.
Notes about the dialing plan:
• allows incoming calls to be routed to sets based on service type and digits received
• provides the ability to map user-dialed digits to a service type on a Call by Call basis
• allows long distance carrier selection through user-dialed Carrier Access Codes
Consult your customer service representative to determine how your dialing plan is configured.
Chapter 5 ISDN overview
Telephony Device Installation Guide
35