# Analog Trunks

## Purpose

The Analog Trunks form is used to assign a trunk number, trunk service number (or a DTS service number), circuit descriptor number, and interconnect number to all analog trunk circuits in the system.

Use this form to perform the following tasks:

- Program Analog Trunks

## Conditions

- E&M trunks designated as "Loudspeaker Pager" trunks in the Controller Module Configuration form do not appear in this form.

## Field Descriptions

Parameter | Description | Default Value
Cabinet | System-generated, protected field. Identifies the card location. |
Shelf | System-generated, protected field. Identifies the card location. |
Slot | System-generated, protected field. Identifies the card location. |
Circuit | System-generated, protected field. Identifies the card location. |
Card Type | System-generated, protected field. Identifies the card type. |
Trunk Number | Enter a unique identification number for the trunk. This Trunk Number is used in the Trunk Groups form to collect trunks into Trunk Groups. Can be in the range of 1 to 9999. The maximum number of trunks that you can program is 628. NOTE: Deleting an entry from this form will also remove it from the Trunk Groups form. A trunk cannot be deleted if it is the last trunk in a trunk group. |
Trunk Service Number | Enter a Trunk Service Number to define the incoming characteristics of the trunk. The Trunk Service Number is defined in the Trunk Attributes form. Any number of trunks may share the same Trunk Service Number. NOTE: The Trunk Service Number and DTS Service Number fields are mutually exclusive. Complete one field only. | Blank
DTS Service Number | Enter a DTS service number to define the COS and Intercept Number of the trunk. The DTS Service Number is defined in the DTS Service Profiles form. Any number of trunks may share the same DTS Service Number. NOTE: The Trunk Service Number and DTS Service Number fields are mutually exclusive. Complete one field only. | Blank
Circuit Descriptor Number | Enter a Circuit Descriptor Number to define the operational parameters of the trunk circuit. Any number of trunks may share the same Circuit Descriptor Number. Can be any number from 1 to 32. NOTE: The card type of the Trunk Circuit must match the card type of its corresponding circuit descriptor. | Blank
Interconnect Number | Enter a number that will be used in the Interconnect Restriction form to define which other devices can connect to the trunk. Can be any number from 1 to 64. | Blank
Tenant Number | Enter the number of the trunk's tenant. | 1 (landlord)
Balance Network Setting | The Line Measure Tool allows you to automatically program this field with the required setting after you run the Individual or Batch line quality test. The setting in this field applies to all LS trunks with the exception of LS trunks that are supported by an ASU I. See Individual or Batch line quality test for more information. You must manually program the Balance Network setting for LS trunks that are supported by an ASU I in the CO Trunk Circuit Descriptor form. Balance Network Settings define the impedance at which the two to four wire hybrid circuits are balanced. The setting affects side-tone on a low delay network, and echo in an IP network. The available options are: 600 — if the load presented to the trunk port is resistive, (loaded cable, broadband system) National Complex — if the load is capacitive (long unloaded cable) Alternate Complex_1/TBR21 Alternate Complex_2 Spare 1 Spare 2 Spare 3 Spare 4 NOTES The impedance values used for each setting vary by country or region and according to whether the LS trunk is connected to an IP port. For a list of impedance values, consult the Hardware Technical Reference Manual. Before you can manually change the setting in this field, you set the Automatic Setting field (above) to "No". | National Complex
Trunk Category | The Line Measure Tool allows you to automatically program this field with the required setting after you run the Individual or Batch line quality test. The setting in this field applies to all LS trunks with the exception of LS trunks that are supported by an ASU I. See Individual or Batch line quality test for more information. You must manually program the Balance Network setting for LS trunks that are supported by an ASU I in the CO Trunk Circuit Descriptor form. For short analog CO trunks (ACO Short) select "Short". For long analog CO trunks (ACO Long) select "Long". For extra long analog CO trunks (ACO XLong) select "XLong". If you select "Unknown", ACO Short is applied. NOTES For Loop Start trunks, the Trunk Category setting is applied on a per trunk basis. For non-Loop Start trunks this setting is applied based on the Trunk Circuit Descriptor. If you change the Trunk Category setting for a non-Loop Start trunk, the setting is applied to all trunks that share the same Trunk Circuit Descriptor number. Before you can manually change the setting in this field, you set the Auto Select field (below) to "No". | Short
Auto Select | Select Yes if you want the system to automatically apply the recommended Impedance and Length settings from Line Measure Tool tests to LS trunks. Select No if you prefer to manually configure the settings in this form. Note that when you change this option from No to Yes, the system automatically runs a Line Quality Measure test on the LS trunk. The system applies the recommended settings to the LS trunks. change this option from Yes to No, the system automatically runs a Line Quality Measure test on the LS trunk using the current settings that are entered in the Balance Network Setting field and Trunk Category field, and updates the trunk with these settings. | No
Milliwatt Trunk Number | This number applies to the Line Measure Tool. Enter the trunk number of the loop back trunk. The loop back trunk provides the Milliwatt tone to the trunk that is being tested. | Blank
CO Telephone Number | This number applies to the Line Measure Tool. Enter the telephone number of the LS trunk that you want to test. Maximum 26 digits. | Blank