Nortel Networks NN43001-301 manual Cable requirements

102NT8D72 and QPC720 PRI card installation

Note 2: This chapter includes instructions for installing an additional network shelf on a system (when no vacant Network slots are available to install PRI packs, additional network shelves can replace Intelligent Peripheral Equipment shelves located on the rear of the Common Equipment or Disk shelves). Refer to "Install an additional network shelf" (page 125).

Cable requirements

Shielded 22 AWG (0.644 mm) cables are recommended for connecting the PRI to the crossconnect point. This cable consists of two twisted-pair conductors.

The transmit and the receive pairs must be enclosed in a polyvinyl jacket. This type of cable is commonly referred to as "6-conductor" cable. The cable should be grounded at the crossconnect point.

In addition to twisted-pair conductors, 75-ohm coaxial cable can also be used to provide connection to the office repeater or line terminating unit (LTU).

For manufacture cables of lengths different than those of the standard cables provided, see "Nonstandard cables" on "Nonstandard cables" (page

295)of this practice.

For the 2.0 Mb NT8D72 PRI card, see Figure 41 "NT8D72(Half Group cabling) on Half and Single Group systems without an echo canceller" (page 103), Figure 42 "NT8D72 (Half Group cabling) for Half and Single Group systems, with an echo canceller" (page 104), Figure 43 "NT8D72 (Single Group cabling) for Half and Single Group systems, without an echo canceller" (page 105), and Figure 44 "NT8D72 (Single Group cabling) for Half and Single Group systems, with an echo canceller" (page 106) for Half Group and Single Group cabling arrangements applying to the system; also, refer to Table 52 "NTBK51AA DCH switches for NT5D97AD" (page 138). For the 2.0 NT8D72 on a Multi Group arrangement, see Figure 45 "NT8D72 (Multi Group cabling) for Multi Group systems without an echo canceller" (page 107) and Figure 46 "NT8D72 (Multi Group cabling) for Multi Group systems with an echo canceller" (page 108); also refer to Table 30 "Cable for the NT8D72 PRI card for Multi Group systems" (page 116).

For the 1.5 Mb QPC720 PRI card on Half Group and Single Group systems, see Figure 47 "QPC720 (Half Group cabling) for Multi Group systems without an echo canceller" (page 109), Figure 48 "QPC720 (Half Group cabling) for Multi Group systems with an echo canceller" (page 110), Figure 49 "QPC720 (Single Group cabling) for Multi Group systems without an echo canceller" (page 111), also, refer to Table 31 "Cable for the QPC720 PRI card for Half and Multi Group systems" (page 117). For the QPC720 on

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

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