NT8D09 Analog Message Waiting Line card Page 561 of 906Circuit Card Description and InstallationConfigurationThis section outlines the procedures for configuring the switches and jumperson the NT8D09 Analog Message Waiting Line card and configuring thesystem software to properly recognize the card. Figure 112 on page 563shows where the switches and jumper blocks are located on this board.Jumper and switch settingsThe NT8D09 Analog Message Waiting Line card has no user-configurablejumpers or switches. The card derives its address from its position in thebackplane and reports that information back to the CPU through the LANLink interface.Software service changesIndividual line interface units on the NT8D09 Analog Message Waiting Linecard are configured using the Analog (500/2500-type) TelephoneAdministration program LD 10.The message waiting feature is enabled by entering data into the customerdata block using LD 15. See Software Input/Output: Administration(553-3001-311) for LD 10 and LD 15 service change instructions.Analog message waiting line cards with a vintage later than NT8D09AKprovide a fixed +2 dB transmission profile change in the gain of the D/Aconvertor. See Table 183 on page 562.This transmission profile change is used for control of end-to-end connectionloss. Control of such loss is a major element in controlling transmissionparameters such as received volume, echo, noise, and crosstalk. The loss planfor the analog message waiting line card determines port-to-port loss betweenan analog line card unit (port) and other IPE ports. LD 97 is used to configure
