Avaya BCM 4.0 Networking Guide de configuration télécharger pdf (Page 460)

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460 Chapter 53 Call Security: Configuring Direct Inward System Access (DISA)

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Remote access on PRI

Remote system access on PRI trunks is similar to that of T1 E&M trunks connected to a private

network.

The main differences are:

• A remote caller is on the public network dialing standard local or long-distance telephone

numbers.

• The digits received are delivered by the central office.

• Answer with DISA cannot be administered to a PRI trunk. Instead, you can program the dialed

digits to match those of a specific target line DN, the DISA DN or the Auto DN.

• North America: Use incoming Call by Call (CbC) Service routing to map the call type to the

DISA DN.

With FX, INWATS, 900, and SDS service types, either a Service Id (SID) or a CDN is mapped

to Target Line Receive Digits. This is programmed under “Configuring PRI Call-by-Call

services” on page 180. DISA may be accessed by having the SID or CDN map to the DISA

DN. This example has a Receive Digit Length = 4, DISA DN = 1234, and CbC Routing with

(Service Type = FX, Map from SID = 2, Map to digits = 1234).

A call presented to the BCM system with service type FX and SID 2 will be handled as

follows:

— The ISDN setup message will specify FX with SID = 2

— The FX SID = 2 will be mapped to DISA DN digits 1234

— The call will be answered with DISA.

Refer to “Configuring lines: PRI” on page 177.

Remote access on DPNSS lines

A remote caller can access a BCM system dial tone, select a line pool that contains exchange lines

or DPNSS lines, then dial a number. The procedure is identical to dialing an outside number from

an extension in the local system. The main features are:

• Calls coming from another switch to the BCM system are routed in two ways, depending on

the Answer mode that you program. If the Answer mode is set to Manual, and the line is

assigned to ring at an extension, the incoming call automatically rings at the assigned

extension. If Answer mode is set to Auto, BCM automatically answers the incoming call.

Because most other DPNSS features are extension-specific, Nortel recommends that all

DPNSS lines are configured as auto-answer lines.

• The Page feature is available to both remote callers and callers within the system. A remote

caller must have DTMF capability to access the Page feature.

• The line redirection feature allows the originating party to redirect a call that is waiting a

connection or re-connection to an alternate destination after a time-out period. Failed calls can

be redirected. Priority calls cannot be redirected.

Refer to “Private networking: DPNSS network services (UK only)” on page 371.

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Avaya BCM 4.0 Networking Guide de configuration Page 460

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