Nortel Networks 553-3001-211 manual Card reset, Background audit

Page 778 of 894 NTBK51 Downloadable D-channel Handler daughterboard

download depends on the result of the check made by the CPU on the MSDL base code and application software.

If a forced download enable command is executed in LD 96, the MSDL base code and application are forced down to the DDCH card, even if the base and application software is already resident on the DDCH card. In order to complete a forced download, the following conditions must be met:

•the DDCH card must be enabled

•the D-channel port must be disabled

Card reset

After a card reset, the MSDL base code and the D-channel application software are validated by the CPU. The software is stored in flash EPROM on the DDCH card and does not have to be downloaded. But if the software is missing due to new installation, corruption, or loadware version mismatch, the CPU automatically downloads the base/application into the DDCH card.

Background audit

If a background audit of the card and associated applications finds that a download is required, the card is queued in the PSDL tree. Downloading is performed in background mode based on the entries in the PSDL tree.

553-3001-211 Standard 2.00 September 2004