Nortel Networks 555-4001-135 User Manual

Note:  There is an upgrade from MICB Release 1 to ICB Release 4 
but data conversion is not supported. This is the same as a new 
installation.

Insert a PCMCIA card into the top PCMCIA slot accessible through the 
ICB faceplate for external memory expansion, new voice 
announcements, and firmware upgrades. The available storage for 
voice prompts on the PCMCIA disk is 130 Mbytes, providing 260 
minutes of voice recording. The ICB uses the PCMCIA ATA, Type II and 
Type III Flash cards for ICB software upgrade and backup.

The ICB card has two PCMCIA sockets. PCMCIA hard drive cards store 
ICB voice prompts and firmware code. The ICB ships with the PCMCIA 
hard drive. The bottom socket houses the PCMCIA hard drive card that 
contains the current firmware and customer data. Use the top socket to 
upgrade the firmware. 

 shows how to load 

PCMCIA cards into the ICB faceplate slots to upgrade the ICB capacity.

MICB Release 3

NT5D51AC

ICB Release 4

NT5D51BC

Yes

ICB Release 4

NT5D51AC

ICB Release 4

NT5D51BC

Yes