Nortel Networks 311 Card reset

998 NTBK51 Downloadable D-channel Handler daughterboard

If a forced download enablecommand is executed in LD 96, the MSDL base

code and application are forced down to the DDCH card, evenif the base

and application software is already resident on the DDCH card. In order to

complete a forced download, the followingconditions must be met:

•the DDCH card must be enabled

•the D-channel port must be disabled

If a normal download enable command is executed, the MSDL base code

and application are conditionally downloaded to the DDCH card. This

conditional download depends on the result of the check made by the

Option 11C CPU on the MSDL base code and application software.

If a forced download enable command is executedin maintenance 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

If a normal download enable command is executed, the MSDL base code

and application is conditionally downloaded to the DDCH card. This

conditional download depends on the result of the check made by the CS

1000 CPU on the MSDL base code and application software.

If a forced download enablecommand is executed in LD 96, the MSDL base

code and application are forced down to the DDCH card, evenif the base

and application software is already resident on the DDCH card. In order to

complete a forced download, the followingconditions 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 need not 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.

Following a card reset, the MSDL base code andthe D-channel application

software are validated by the Option 11C CPU.It does not need to be

downloaded because the software is stored in ﬂash EPROM on the

DDCH card. However, if the software is missing (due to new installation,

corruption loadware version mismatch), the CPU automatically downloads

the base/application into the DDCH card.

Nortel Communication Server 1000

Circuit Card Reference

NN43001-311 01.04 Standard

Release 5.0 23 May 2008