DEFINITY Made Easy Tools
Issue 2, November 2000

Install Telecommunications Cabling

Cable Installation

Route the cables from the rear of the SCC stack or MCC to the MDF via the Install Cable Slack Managers. See Cable Slack Manager.

This section has information about

• Equipment Room Cabling Labels


• Cable Routing Guidelines


• Control Carrier Outputs Cable Installation


• Connect Control Carrier Outputs Cable


• Trunk Cables Among Network Interface, Sneak Fuse Panel, and Cabinet

And procedures for:

• Label Control Carrier Cable


• Connect Control Carrier Outputs Cable


• Connect Trunk Pairs Using Concentrator Cables


• Connect Trunk Pairs to Cabinet Using Jumper Wires To Establish 3-Pair Modularity


• Install Cables Between Cabinet and MDF


• Install Connector Cables Between Auxiliary Cabinet and MDF

Equipment Room Cabling Labels

The purple port label shown in Equipment Room Cabling Labels is installed on both ends of the 25-pair cables connecting to the trunk/auxiliary field and/or distribution field.

The top blue/yellow building and floor labels are for cables connecting from the equipment room to a site/satellite location on another floor or in another building. The yellow label is for auxiliary circuits connecting to the trunk/auxiliary field. The bottom blue/yellow label is for 25-pair cables connecting to site/satellite closets.

Equipment Room Labels details the label name and range of each label. Cable/Connector/Building Label Ordering Information provides label ordering information.

Self-Stick Label on 25-Pair Cable Connector shows the proper way to install a label on a 25-pair cable connector. Install the label near the rear of the connector so it is not obscured by the cabinet connector retainers. It can also be installed on the skin of the cable near the connector.

Cable Routing Guidelines

The following guidelines should be used when installing the equipment room cabling. Following these guidelines will maximize use of the cable slack managers and make future cabling additions and changes easier.

Cable Routing to Top Terminal Blocks and Cable Routing to Bottom Terminal Blocks show typical cable routing from the cabinet to the top and bottom of the MDF, respectively.

Route Cables to Main Distribution Frame

The following guidelines should be followed when routing cables from the cabinet to the MDF.

• Each port cable is connected at the cabinet and then routed along the front trough of the cable slack manager to the connecting/terminal block where the cable is to be terminated.


• Enough slack must be left at the cabinet end of the cable to allow for proper dressing of the cables.


• Route the cable from the cabinet to the wall. Place the cable beside 1 of the rows of columns in the cable slack manager.

• Determine the length of the cable required to reach from the cable slack manager to the assigned connecting/terminal block.


• The cable must be supported on the wall using "D" rings.


• Cable slack is stored by coiling the cable around the columns in the cable slack manager. The first run should always go across the full length of the 5 columns in the cable slack manager.


• Connect the cable to the assigned connecting/terminal block.


• Avoid placing copper cables where they may bend or strain fiber optic cables.

Control Carrier Outputs Cable Installation

A connector on the rear of the Control Carrier is labeled AUX. A 25-pair cable connects the AUX connector to a 110-type terminal block in the yellow field of the trunk/auxiliary field. The AUX connector outputs include the following:

• Alarm monitoring for the processor interface


• 7 DC power (-48 VDC) sources for emergency transfer units


• 3 DC power (-48 VDC) sources for remotely powering a total of 3 attendant consoles or executive voice terminal adjuncts


• The remote maintenance internal modem connection location


• Access to a relay contact is available to actuate a light, bell, or similar type customer-supplied device. The relay can be administered to make contact when a major, minor, or warning alarm condition occurs in the system

Trunk Cables Among Network Interface, Sneak Fuse Panel, and Cabinet

The 1-pair of Central Office (CO) trunks are installed by the network provider in the green field. Up to 24 pairs may be terminated on each row of the 110-type terminal block. Tie trunks also appear in the green field with up to eight 3-pair trunks terminated on each row of the 110-type terminal block.

WP-90929, List 1 and 3 concentrator cables can be used to connect the cabinet to the 110-type terminal blocks in the purple field. The 1-pair patch cords/jumper wires are then run from the purple terminal block rows to the green terminal block rows in order to establish the correct 3-pair modularity.

Equipment Room Cabling Labels

Figure Notes:

1. Purple Label (Port Cable)


2. Blue/Yellow Label (Building and Floor)


3. Yellow Label (Auxiliary)


4. Blue/Yellow Label (Site or Satellite)

Self-Stick Label on 25-Pair Cable Connector

Cable Routing to Top Terminal Blocks

Figure Notes:

1. Main Distribution Frame


2. AC Power Cord (AC-Powered Cabinets Only)


3. Cable Slack Manager Number 1


4. Trunk/Auxiliary Field


5. Station Distribution Field


6. Cable Slack Manager Number 2


7. Cable Slack Manager Number 3


8. System Cabinet(s)


9. To Building Cables


10. 10 AWG (#25) (6 mm ²) Wire to Coupled Bonding Conductor

Cable Routing to Bottom Terminal Blocks

Figure Notes:

1. Main Distribution Frame


2. AC Power Cord (AC-Powered Cabinets Only)


3. Cable Slack Manager Number 1


4. Trunk/Auxiliary Field


5. Station Distribution Field


6. Cable Slack Manager Number 2


7. Cable Slack Manager Number 3


8. System Cabinet(s)


9. Building Cables (Through Cable Trough)


10. 10 AWG (#25) (6 mm ²) Wire to Coupled Bonding Conductor