560 NT8D09 Analog Message Waiting Line cardTable 226Transmission Profile ChangesVintage A/D convertor gain D/A convertor gainPrevious to AK –3.5 dB –2.5 dBAK and later –3.5 dB –0.5 dBThe analog message waiting line card brings the 16 phone lines to the IPEbackplane through a 160-pin connector shroud. The backplane is cabledto the I/O panel on the rear of the module, which is then connected to theMDF by 25-pair cables.Telephone lines from station equipment cross connect to the analogmessage waiting line card at the MDF using a wiring plan similar to thatused for trunk cards. A typical connection example is shown in Figure 139"Analog message waiting line card - typical cross connection example"(page 563), and Table 227 "Analog message waiting line card - backplanepinouts" (page 561) shows the I/O pin designations at the backplaneconnector. This connector is arranged as an 80-row by 2-column array ofpins. Normally, these pin positions are cabled to 50-pin connectors at theI/O panel in the rear of each module for connection with 25-pair cables tothe cross-connect terminal.The information in Table 227 "Analog message waiting line card - backplanepinouts" (page 561) is provided as a reference and diagnostic aid at thebackplane, since the cabling arrangement may vary at theI/O panel. SeeCommunication Server 1000M and Meridian 1 Large System Installation andConfiguration (NN43021-310) for cable pinout information at the I/O panel.Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
