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DEFINITY Made Easy Tools
Issue 3, December 2001



System 75 XE to R8si (Blowback)

Interconnect Port Networks - Dual cabinet (EPN) upgrade only [75 XE upgrade]

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Note: These procedures are for an EPN upgrade only.

You will be making fiber-optic connections between cabinets.

Select the procedure that best fits your location and reliability level from the table below:

Reliability level

Adjacent cabinets

Remote cabinets

Standard/High

Connecting standard or high reliability adjacent cabinets

Connecting standard or high reliability remote cabinets

Critical

Connecting Critical Reliability adjacent cabinets

Connecting critical reliability remote cabinets

About fiber-optic cables


Note: It is important to label every cable that you install. For details, refer to the section, Labels for Fiber-Optic Cables, in Appendix E of the installation manual.


Note: Throughout these procedures, remember to keep track of which fiber is attached to which connector on each lightwave transceiver. This section provides figures offering the suggested way of making these connections.

The connectors on the lightwave transceivers are labeled either TX (transmit) or RX (receive), while the fibers attached to each connector are numbered either 1 or 2. A viable fiber connection is only made when both fibers in each cable (that is 1 and 2) route from the TX connector of a port network to the RX connector of its adjacent port network. For an example, refer to Fiber-Optic Connections PPN to EPN (standard/high reliability adjacent cabinets).


Note: For implementation details, refer to the "Fiber Link Administration" sections of DEFINITY Communications System Generic 3 V4 Implementation, 555-230-655.

Maximum fiber cable lengths

Transceiver type

Maximum distance

9823-A Lightwave transceiver

4900 feet (.9 mile)

9823-B Lightwave transceiver

25,000 feet (4.7 miles)


Note: These distance limitations are approximate measurements of the actual fiber right-of-way (not of the shortest linear distance) between the two endpoints.

Connecting standard or high reliability adjacent cabinets

When a standard-reliability PPN and EPN are collocated, one fiber-optic cable (FL2P-P-XX) and two lightwave transceivers (9823-type) are required to connect the EPN.


Note: For the FL2P-P-XX fiber-optic cable, the -XX suffix represents the length of the cable in feet. Based on floor-plan considerations, the length of these cables may vary. However, 20-foot cables are normally adequate for a Release 8si with two port networks.

  1. Behind control cabinet A of the single-carrier PPN (see Standard-Reliability Release 8si with Two Port Networks and Fiber-Optic Connections PPN to EPN (standard/high reliability adjacent cabinets)):

  2. Behind control cabinet A of the single-carrier EPN:

  3. Carefully attach the fiber-optic cable (with cable ties) to the rear covers of the EPN stack.

  4. Coil up the surplus length of fiber-optic cable, and place the coil either in the cable manager or on the bottom shelf (holding the power supply) of the PPN cabinet.

Standard-Reliability Release 8si with Two Port Networks

Fiber-Optic Connections PPN to EPN (standard/high reliability adjacent cabinets)

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Connecting standard or high reliability remote cabinets

When a standard-reliability PPN and EPN are remotely separated with fiber, two fiber-optic cables (FL2P-P-XX), two lightwave transceivers (9823-type), and two lightwave-interface units (provided by the PSC) are required.

  1. Behind control cabinet A of the single-carrier PPN (Standard-Reliability Release 8si with Two Port Networks and Fiber-Optic Connections PPN to EPN (standard reliability remote cabinets)):

  2. Behind control cabinet A of the single-carrier EPN:

Standard-Reliability Release 8si with Two Port Networks

Fiber-Optic Connections PPN to EPN (standard reliability remote cabinets)

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Connecting Critical Reliability adjacent cabinets

When a critical-reliability PPN and EPN are collocated, two fiber-optic cables (FL2P-P-XX) and four lightwave transceivers (9823-type) are required to connect the EPN.

  1. Behind control cabinet A of the single-carrier PPN (see Critical-Reliability Release 8si with Two Port Networks and Critical Reliability fiber optic connections (adjacent cabinets)):

  2. Behind control cabinet A of the single-carrier EPN:

  3. Behind control cabinet B of the single-carrier PPN:

  4. Behind port cabinet B of the single-carrier EPN:

Critical-Reliability Release 8si with Two Port Networks

Critical Reliability fiber optic connections (adjacent cabinets)

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Connecting critical reliability remote cabinets

When a critical-reliability PPN and EPN are remotely separated with fiber, four fiber-optic cables (FL2P-P-XX), four lightwave transceivers (9823-type), and four lightwave-interface units (provided by the PSC) are required.

  1. Behind control cabinet A of the single-carrier PPN (see Critical-Reliability Release 8si with Two Port Networks and Critical Reliability fiber-optic connections (remote)):

  2. Behind control cabinet A of the single-carrier EPN:

  3. Behind control cabinet B of the single-carrier PPN:

  4. Behind port cabinet B of the single-carrier EPN:

Critical-Reliability Release 8si with Two Port Networks

Critical Reliability fiber-optic connections (remote)

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