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Can you explain what a Bridged Extension is

A bridged extension is an extension that appears on more than one telephone (one primary telephone and one or more secondary telephones). Use the button mapping feature to set the bridged extensions button type to define bridged extensions.

CAUTION: On any system you can configure a maximum number of bridged extensions on primary telephones. This table lists the maximum numbers:

 
System
Device Limit
Max Number of Primary Phones
Max Number of Bridged Extensions on Primary Phones
V3001R
1500
400
1200
V3000
250
400
1200
V3000*
1500
400
1200
NBX 100
200
100
300
V5000
250
250
1200
V5000
More than 250
400
1200
NOTE: There is no restriction on the number of secondary phones or the number of bridged extensions that appear on secondary phones.
* = with optional memory upgrade

There is no restriction on the number of secondary telephones or the number of bridged extensions that appear on secondary telephones.

To verify if a telephone is a primary or a secondary telephone, examine the information in the Bridged Extensions and Mapped Buttons columns of the NBX Bridged Extensions Report (click Telephone Configuration > Telephones > Bridged Extensions).

 
 
Bridged Extension
Mapped Buttons
Primary Telephone
The primary telephone's extension appears, along with the extension of each associated secondary telephone.
Example: Extension 121 is a primary telephone and 101 is a secondary telephone associated with it. In the row for extension 121, the Bridged Exts column contains:
101, 121,
The primary telephone's extension appears once for each button that is mapped as a bridged extension.
Example: Extension 121 is a primary telephone and has 3 buttons mapped as bridged extensions. In the row for extension 121, the Mapped Buttons column contains:
121, 121, 121,
Secondary Telephone
No information appears.
For each primary telephone that is associated with this secondary telephone, the primary telephone's extension appears once for each button on the secondary telephone that is mapped as a bridged extension to that primary.
Example: Extension 101 is a secondary and has 3 buttons mapped to the primary telephone at extension 121 and 2 buttons mapped to the primary telephone at extension 127. In the row for extension 101, the Mapped Buttons column contains:
121, 121, 121, 127, 127,

NOTE: An asterisk in front of the extension identifies phones associated with the default user profile, New User, which is automatically associated with new telephones during Auto Discovery.

The information in the Bridged Extensions column indicates which telephones have bridged extensions, which are primary telephones, and which are secondary telephones.

Example: The report lists extension 1427 in the Extension column and displays the following information in the Bridged Extensions column:

1000, 1200, 1427,

  • 1000 is a secondary telephone mapped to 1427
  • 1200 is a secondary telephone mapped to 1427
  • 1427 is a primary telephone, because it is mapped to itself

The report displays the following information the Mapped Buttons column:

1427, 1427, 1427,

There are three buttons on the primary telephone that are being used as bridged extension buttons.

Secondary Telephone Mappings

To verify if a secondary telephone is mapped to more than one primary telephone, compare the information in the Bridged Extensions and Mapped Buttons columns.

For a secondary telephone, no information appears in the Bridged Extensions column. The Mapped Buttons column contains an extension number for each button that is mapped to a primary telephone.

Example: The report lists extension 1200 in the Extension column and displays the following information in the Mapped Buttons column:

1427, 1427, 1427, 1490, 1490, 1531, 1531, 1531,

The telephone with extension 1200 (or an Attendant Console associated with extension 1200) has:

  • Three buttons mapped as bridged extensions to extension 1427
  • Two buttons mapped as bridged extensions to extension 1490
  • Three buttons mapped as bridged extensions to extension 1531