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Chapter 38 Private networking: DPNSS network services (UK only) 375

BCM 4.0 Networking Configuration Guide

DPNSS supports the Universal Dialing Plan (UDP), an international standard for sending and

receiving private numbers over networks. The UDP requires that a dialing number includes the

following:

• a Private Access Code, programmed into the system as part of the destination code table to

prevent conflicts with the internal numbering system. (Access Codes)

• a Home Location Code (HLC) assigned to each PBX system, and configured as part of the

destination code (a maximum of seven digits). For each HLC, a destination code must be

programmed in the system. (Dialing plan, UDP, Location code)

• a Directory Number (DNs) assigned to each extension as a line appearance. The DN appears

as the last string segment in a dialed number. In the number 244-1111, 1111 is the DN.

A typical Private Number, using a private access code and dialed from another site on the network,

appears below.

In this networking example, a private network is formed when several systems are connected

through a Meridian M1 and a terminating BCM system. Each site has its own HLC and a range of

DNs. Figure 124 illustrates this example.

Calls are dialed and identified to the system as follows:

• To reach a telephone inside the Private Network, at the BCM site, the user dials the DN of

choice.

• To reach a telephone inside the Private Network, from another site, the user dials HLC + DN.

• To reach a telephone outside the Private Network, the user dials an Access Code + HLC + DN

Each node has its own destination (dest) codes which includes the appropriate access and HLC

codes to route the call appropriately.

Table 89 shows examples of the construction of numbers used when dialing within the example

network. Note that 6 is the Private Access code.

Private Access Code + Home Location Code + Directory Number = Calling Party Number

6 + 848 + 2222 = 6-848-2222

Table 89 Calling numbers required for DPNSS network example

Calling Site LOC/HLC

Calling Party

Number

Called Site Dialing String

Called Party

Number

Site A 244 244 1111 Site B 6 668 2222 668 2222

Site B 668 668 2222 Site D 6 848 2222 848 2222

Site D 848 2222 Site D 2229 2229

Site C 496 496 3333 Public DN 9 563 3245 563 3245

1 2 ... 370 371 372 373 374 375 376 377 378 379 380 ... 757 758

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Avaya BCM 4.0 Networking Guida di Configurazione Pagina 375

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