Page 174 of 906 NT1R20 Off-Premise Station Analog Line card553-3001-211 Standard 3.00 August 2005Configuring the OPS analog line cardThe line type, terminating impedance, and balance network configuration foreach unit on the card is selected by software service change entries at thesystem terminal and by jumper strap settings on the card.Jumper strap settingsEach line interface unit on the card is equipped with two jumper blocks thatare used to select the proper loop current depending upon loop length. SeeTable 71.For units connected to loops of 460 to 2300 ohms, both jumper blocks for thatunit must have jumper blocks installed. For loops that are 460 ohms or less,jumper blocks are not installed. Figure 24 on page 176 shows the location ofthe jumper blocks on the OPS analog line card.Table 71OPS analog line card – configuration (Part 1 of 2)Application On-premise station (ONS) Off-premise station (OPS)Class of Service(CLS) (Note 1)ONP OPXLoop resistance(ohms)0–460 0–2300 (Note 2)Jumper strapsetting (Note 6)Both JX.0 and JX.1offBoth JX.0 and JX.1offBoth JX.0 and JX.1onLoop loss (dB)(Note 3)0–1.5 >0–3.0 >2.5–3.0 0–1.5 >1.5–2.5 >2.5–4.5 >4.5–15TIMP(Notes 1, 4)600ohms600ohms600ohms600ohms600ohms600ohms600ohmsBIMP(Notes 1, 4)600ohms3COM 3CM2 600ohms3COM 3CM2 3CM2
