El Derecho Comparado

For more information about TAPI Route Points, see TAPI Route Points on page 227.

Table 9 Typical Extension Ranges for 3-digit and 4-digit Dial Plans Extension Type 3-digit 4-digit

Telephones 100–449 1000–3999

Auto Attendant 500–599 500, 501, plus 5500–5599

Hunt Group 450–499 4000–4099

External Extensions (includes line card ports and Call Park)

600–799

(external Auto Discovery starts at 750)

6000–7999

(external Auto Discovery starts at 7250)

Call Park (must fall within External Extension range)

Managing Extensions 57

Table 10 provides a more detailed explanation of extension types, including default extension ranges and values for 3-digit and 4-digit dial plans.

Note 1: The NBX V3000 and the Superstack 3 NBX V5000 are shipped with a factory default 4-digit dial plan. If you import any 3-digit plan, you must manually specify any 3-digit extension ranges that are not set by the imported plan. You must also manually change any device extensions so that they fall within the appropriate range.

Note 2: The NBX 100 is shipped with a factory default 3-digit dial plan. If you import any 4-digit plan, you must manually specify any 4-digit extension ranges that are not set by the imported plan. You must also manually change any device extensions so that they fall within the appropriate range.

Note 3: TAPI Route Point extensions occur in the same range as telephones. TAPI Route Point extensions do not appear in telephone lists within the NBX NetSet utility. For more information about TAPI Route Points, see TAPI Route Points on page 227.

Table 10 Dial Plan Extension Settings Field Purpose (See Notes 1 – 3)

Telephone Extensions Range

The range of extensions for telephones.

■ 4-digit dial plan: 1000–3999 ■ 3-digit dial plan: 100–449

TAPI route point extensions are included in the telephone extensions range.

Length — This pull-down field specifies the number of digits for telephone extensions.

Auto Attendant Extensions Range

The range of extensions for Auto Attendants. Default:

■ 4-digit dial plan: 5500–5599 ■ 3-digit dial plan: 500–599

For both 3-digit and 4-digit dial plans:

■ Extension 500 is reserved as the default Auto Attendant. ■ Extension 501 is reserved as the voice mail Auto Attendant.

Table 9 Typical Extension Ranges for 3-digit and 4-digit Dial Plans (continued) Extension Type 3-digit 4-digit

Default Auto Attendant Extensions

Default extension that the NBX system assigns to the default Auto Attendant. The Auto Discovery process assigns this extension.

The system must direct each call coming in on an external line to an extension. During the Auto Discovery of external lines (analog lines and Digital Line Card channels), the NBX system assigns the default extension (500) as the Auto Attendant extension. After you import the dial plan configuration file and complete the Auto Discovery process, you can manually configure the extension for each analog line and each Digital Line Card channel.

For both 3-digit and 4-digit dial plans:

■ Extension 500 is reserved as the default Auto Attendant. ■ Extension 501 is reserved as the voice mail Auto Attendant.

Hunt Group Extensions Range

The range of extensions for hunt groups.

■ 4-digit dial plan: 4000–4099 ■ 3-digit dial plan: 450–499

External

Extensions Range

The range of extensions that are connected to external devices, such as Analog Line Card ports, Digital Line Card ports (BRI-S/T, T1, E1, ISDN PRI), Call Park, and Paging extensions.

Default:

■ 4-digit dial plan: 6000–7999 ■ 3-digit dial plan: 600–799

Call Park Extensions Range

The range of extensions for Call Park. This feature allows the user to temporarily park a telephone call and then pick it up at a different telephone. Call Park extensions must be a subset of

external extensions.

■ 4-digit dial plan: 6000–7999 ■ 3-digit dial plan: 600–799

Table 10 Dial Plan Extension Settings (continued) Field Purpose (See Notes 1 – 3)

Managing Extensions 59

Some countries reserve numbers beginning with 11 for numbers of national importance. To accommodate this requirement, you can begin the telephone extension range at 120.

Changing Extension Length and Ranges

You can view and change extension settings, such as extension length and extension ranges.

If you are changing from a 3-digit to a 4-digit plan, import the 4-digit dial plan configuration file before you configure or autodiscover any devices. To view and change extension settings:

1 On the Operations tab, click Settings. The Settings dialog box appears. 2 Make the desired changes to the extension settings. Table 10 describes

each field.

3 Click OK to enable your changes and exit the dialog box.

Start External Discovery At

The extension to use when autodiscovering external devices. The system assigns extensions starting with this number and incrementing upward as they are discovered. If the highest extension is reached, the system starts looking from the beginning of the external range and selects the first unused one. Typically, systems do not use all of the available external extensions from 600–799 in a 3-digit dial plan or from 6000–7999 in a 4-digit dial plan.

Default:

■ 4-digit dial plan: 7250 ■ 3-digit dial plan: 750

External Keyset Prefix

In Keyset mode, when a button on an NBX Business Telephone directly accesses an outside line, the NBX system must check Class of Service. The system prepends the External Keyset Prefix

value (typically 8, 9, or 0) when it makes a call in Keyset mode.

Note 1: The NBX V3000 and the Superstack 3 NBX V5000 are shipped with a factory default 4-digit dial plan. If you import any 3-digit plan, you must manually specify any 3-digit extension ranges that are not set by the imported plan. You must also manually change any device extensions so that they fall within the appropriate range.

Note 2: The NBX 100 is shipped with a factory default 3-digit dial plan. If you import any 4-digit plan, you must manually specify any 4-digit extension ranges that are not set by the imported plan. You must also manually change any device extensions so that they fall within the appropriate range.

Table 10 Dial Plan Extension Settings (continued) Field Purpose (See Notes 1 – 3)

Planning Extension Ranges

Plan extension ranges in order to accommodate your present and future needs.

Example: If you initially have 60 telephones and expect to add no more than 100 additional telephones in the future, choose 100–299 as the telephone extension range (1000–1199 in a 4-digit system). This arrangement provides 200 extension numbers to handle the planned 160 telephones plus 40 extra extensions to handle unexpected additions. Once you set the telephone extension range, you can extend it later, provided that the new range does not overlap any other number range. Example: For a 4-digit dial plan, you can set the initial telephone extension range to 1000–1099. This arrangement allows for up to 100 telephone extensions. Later, you can extend the range up to 3999 to allow for 400 telephone extensions. By default, the Hunt Group range starts at 4000, 450 for a 3-digit dial plan, so you cannot assign telephone extensions in either of those ranges.

How Auto Discovery Assigns Extensions

The Auto Discovery process assigns new extensions to telephones and other devices. For example, if you install a T1 or E1 card, you can use Auto Discovery to assign extension numbers to each port on the card. The Auto Discovery process initially assigns a default name (new user) to each new telephone, and assigns the next available extension number. Later, you can replace (new user) with the appropriate user’s name. It is possible to bypass the Auto Discovery process and to manually add a new telephone and assign an extension. However, 3Com strongly recommends that you take advantage of the Auto Discovery process. For instructions on using Auto Discovery, see the section on “Adding a New Telephone” on page 133.

You can define a user in the system database without assigning a telephone to that user. By defining a user with no device, but with a telephone extension only, you create a phantommailbox. The NBX system associates an extension with this phantom mailbox so that the user can have voice mail capability. To access voice mail from any telephone, the user calls either extension 500 (the default Auto Attendant extension), or 501 (the default Auto Attendant voice mail extension.)

Managing Extensions 61

Telephones and Line Card ports reserve most of the extensions within the system. However, there are other extensions within the system. Table 8

shows the default extension ranges for 3-digit and 4-digit dial plans. Modifying Extensions You can modify the extension number of any device in the system.

Normally, you make changes only after you have changed the extension ranges for the NBX system, in order to align the extensions with the new ranges.

CAUTION: Be very careful when you change extensions. The system does not validate changes that you make here, and there is no Undo or Cancel function. A mistake can compromise the operation of the system. To modify extensions:

1 From the NBX NetSet main menu, click Dial Plan > Operations > Modify Extensions to open the Modify Extensions dialog box.

2 In the extensions list, select the extensions that you want to modify. Use Shift-click to select a block of extensions or Ctrl-click to select several extensions at different locations in the list.

3 Select an operation from the Operation drop-down list. Table 11 lists and describes the operations.

4 Make the appropriate entry in the text box to the right of the Operation list. The system uses this number in conjunction with the operation that you selected in step 3. For examples, see “Changing Extensions” below. 5 Click Apply. If the requested change creates a duplicate extension or an

extension of zero length, the change is discarded. 6 Click OK to enable your changes and exit the dialog box.

Table 11 Modify Extension Operations Operation Purpose

Change Extension Modifies the first selected extension. Change Extension applies to only one extension at a time. If you select multiple extensions, the NBX system changes only the first extension that you selected.

Prepend Prepends the digits in front of all selected extensions. Append Appends the digits to the end of all selected extensions. Strip Leading Digits Strips (removes) the specified number of digits from the

Changing Extensions

You can perform several operations through the Modify Extensions dialog box (Table 11). This section describes several examples.

Example: If you select Change Extension from the Operation list, the system replaces the selected extension with the number you type in the text box.

Example: If you select Strip Leading Digits from the Operation list, and type the number 2 in the text box, the system strips (removes) two digits from the beginning of the extension.

Example: If you select extensions 1000 through 1009 and select Strip Trailing Digits from the Operation list, the system does not make any change, because the result is a series of identical numbers (all 100). Converting

Extensions

The Convert Extensions feature enables you to use the NBX NetSet utility to quickly change these extension types from 3-digits to 4-digits or from 4-digits to 3-digits.

■ Virtual Tie Line (VTL) extensions ■ Voice mail port extensions ■ Call Park extensions ■ Paging extensions

The Convert Extensions feature helps you in the larger task of converting a dial plan between 3- and 4-digits. To perform a complete a dial plan conversion, you must also manually convert any existing extensions for these extension types:

■ External extensions (Analog Line Card ports, Analog Terminal Card

ports, and Digital Line Card channels extensions)

■ Internal extensions, which includes TAPI Route Point extensions ■ H323 Gateway extensions

■ Hunt Group and Automatic Call Distribution Group extensions

Strip Trailing Digits Strips (removes) the specified number of digits from the end of all selected extensions.

Table 11 Modify Extension Operations (continued) Operation Purpose

Managing Extensions 63

To convert a dial plan between 3- and 4-digits, follow these steps: 1 If the conversion is part of a hardware upgrade:

a Install the new hardware.

b Install new licenses on the new system. You cannot move licenses from the old system to the new system. Licenses keys are tied to a system (hardware) ID number.

2 If you are upgrading your hardware, migrate your data from the old system to the new system. For details on data migration, see “Migrating Data” on page 339.

3 Make sure the system is set up for the type of dial plan you want. For example, if you are converting an existing system from a 3-digit to a 4-digit dial plan, import the 4-digit dial plan. (Login to the NBX NetSet utility as administrator and click Dial Plan > Operations.) The 4-digit dial plan is the default dial plan for SuperStack 3 NBX and NBX V3000 systems.

4 Login to the NBX NetSet utility on the new system and then click Dial Plan > Convert Extensions.

Existing extensions of these extensions types are automatically converted to conform with the dial plan (3-digit or 4-digit) that is currently installed on the system:

■ Call Park extensions ■ Voice mail port extensions ■ Virtual Tie Lines

■ Paging extensions

5 Manually specify new values for any of these existing extension:

■ Telephone Extensions ■ Auto Attendant Extensions

■ Hunt Group and ACD Group Extensions

■ External Extensions (digital channel and analog port extensions)

To modify an existing extension, click Dial Plan > Operations > Modify Extensions, and edit the list of extensions so that each extension falls into the range for its extension type:

Extension Type 3-digit Dial Plan Defaults 4-digit Dial Plan Defaults

6 Edit your dial plan to configure any needed modifications such as pretranslators.

Managing