# About Line Groups

A line group is a quantity of telephone lines (server ports) that are grouped together and assigned to a single application. Any programming that is done for the application applies to every port in the line group. For example, you may have a NuPoint Voice line group, and/or a Paging line group. The number of ports assigned to each line group is dependent upon the traffic that you expect to experience for that particular application.

At the PBX or CO level, all telephone lines connected to the ports of an individual line group are typically assigned to a hunt group, ACD group, UCD group, etc. to ensure that incoming calls are answered by the first port that is available for the particular application.

Note: oFor MiCollab deployments of NuPoint UM, you must use the MiCollab Users and Services Provisioning application to set up one or more Network Elements before configuring Line Groups.

## Line Group Number

Each line group is represented by a discrete number. Valid line group numbers are 1 through 24. The preset default for the NuPoint Voice application is 1.

## Group Name

The group name identifies the line group’s purpose. For example, a line group could be called “Message Center.” There is no default group name.

## Line(s) in Group

You identify each line (or port) in a group with three identifiers that indicate a module, a slot, and a port. This set of three identifiers is called a triplet.

- Module refers to a CPU, the server’s main processor. Since all NuPoint UM implementations have a single-module server, you can omit the module identifier and simply refer to the slot and port numbers.

Note: Support for multiple-module servers (e.g. NuPoint UM 640) was discontinued with NuPoint Release 6.0. As a result, you do not need to specify a module number for Release 6.0 and later.

- Slot is a reference to line card technology that doesn't apply to current model servers. For this reason, slot is always 0 for mail ports or 5 for fax ports.

- Port refers to the actual port number, starting at 0 and ending at the upper limit of your port licensing.

For each module, slot, and port, there are valid values. The following table describes them:

Module/Host | Slot | Port (virtual)
--- | --- | ---
NuPoint UM 60 ports = 1 (or blank) NuPoint UM 120 ports = 1 (or blank) | Always 0 for mail ports. Always 5 for fax ports. | 0 - licensed port limit, no duplicates allowed OR * for all ports

All of these formats are valid:

Example | Specifies
--- | ---
1:* | All lines on module 1
1:0:0-1:0:59 | All lines from 0 to 59 on module 1
1:0:* | All lines on module 1
1:0:0-2:0:4 | All lines on module 1, slot 0, through module 2, slot 0, port 4
1:*,2:* | All lines on modules 1 and 2

If you are adding multiple lines to a group, you can separate the line numbers by commas as you enter them. For example, to add lines 0,1 and 5, enter 1:0:0,1:0:1,1:0:5.

If you are entering a range of lines, you must use the full triplet on both sides of the range. For example, to add 60 lines on module 1 to a line group, enter 1:0:0-1:0:59 (for single-module systems, you can omit the module number; for example, 0:0-0:59.)

Note: For more information about adding line groups for specific applications, see the help topic for that application.
Parent topic: Configuration Overview