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Design and implementation of the operation and maintenance software for a new GSM transcoder - page 18 / 26

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© NOKIA18 paavo.markkola@nokia.com18.10.2005

Implementation, Software Downloading

The O&M software loads all used software modules from BSC during restart

Compares modules to see whether software update is necessary

The user can also upload modules from PC through the serial port with kermit protocol

TR3E/A plug-in unit is useless if the O&M or FPGA modules on flash are corrupted

Cannot rely on ROM module anymore

Update procedure must be safe

Due to the slow connection (16 kb/s) download takes several minutes for each software module

Needs a temporary location in flash for downloaded modules

If download successful then copy software to primary location

In TCSM2 the software update process has its own flash interface

Flash manager interface needed

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