NEC P, N 1093100 Direct Inward Dialing, Directly dial system extensions from outside the system

Direct Inward Dialing

Direct Inward Dialing

Description

Directly dial system extensions from outside the system.

Direct Inward Dialing (DID) lets outside callers directly dial system extensions. DID saves time for callers who know the extension number they wish to reach. To place a DID call, the outside caller dials the local exchange (NXX) and additional digits to ring the telephone system extension. For example, DID number 926-5400 can directly ring extension 400. The caller does not have to rely on an attendant or receptionist to handle the call. Direct Inward Dialing is an efficient way to handle incoming calls, since callers can reach a large block of extensions over a relatively small number of DID lines. Direct Inward Dialing requires a T1 PCB and T1 DID service with a block (range) of DID numbers from the telco.

For outgoing calls, DID lines operate identically to loop start lines.

In addition to direct dialing of system extensions, DID provides:

❥DID Dialed Number Translation

The system provides a 100-entry DID Translation Table. This table gives you more flexibility when buy- ing DID service from the telco. If you can't buy the exact block of numbers you need (e.g., 300-399), use the translation table to convert the digits received. For example, a translation table could convert digits 500-599 to extension numbers 300-399.

By default, the system uses the last 2 digits of the received DID number to route to extensions 300-399.

❥Flexible DID Service Compatibility

You can program the system to be compatible with DID service of varying lengths (up to 8 digits). DID service is typically 3 or 4 digits long. With 4 digit service, the telco sends 4 digits to the system for trans- lation. With 3 digit service, the telco sends 3 digits to the system for translation. Be sure to set up your system for compatibility with the provided telco service. Additionally, the system is compatible with Dial Pulse (DP) and DTMF DID signaling. DID lines can be either wink start or immediate start.

By default, there are no DID lines programmed.

❥DID Station Intercept

DID Station Intercept automatically reroutes DID calls under certain conditions. There are 3 types of DID Station Intercept:

-Busy/DND Intercept

If a caller dials an extension that is busy or in Do Not Disturb, the system routes the call to the extension’s programmed DID Station Intercept destination.

-Ring No Answer Intercept

If a caller dials an extension that is unanswered, the system routes the call to the extension’s pro- grammed DID Station Intercept destination.

-Busy/DND and Ring No Answer Intercept

If a caller dials an extension that is busy, in Do Not Disturb, or is unanswered, the system routes the call to the extension’s programmed DID Station Intercept destination.

By default, DID Station Intercept is disabled for all extensions.

❥Line Overflow

If an incoming DID call is not answered at the destination extension or at the programmed intercept des- tination, it routes according to Line Overflow. This ensures that the call has an answering point in the system. Line Overflow typically routes to voice mail or to an extension. If the call is not answered at the overflow extension, it normally diverts to Key Ring. If Line Overflow is disabled, an unanswered DID call routes to Key Ring (and cannot overflow).

By default, Line Overflow is disabled. Unanswered calls route to Key Ring (and cannot overflow).

❥Vacant Intercept

If a caller misdials or dials an extension that does not exist, or there is a DID Translation Table error, Vacant Intercept handles the call routing. Vacant Intercept is always enabled. Since Line Overflow is dis- abled by default, Vacant Intercept by default routes to Key Ring (and cannot overflow).

Features

DSX Software Manual Features ◆ 99