5-8
October, 1998
GRF 400/1600 Getting Started - 1.4 Update 2
Cabling and Verifying Media Cards
Cabling the media cards
Differences in media card loading
The same GRF system does not always come up the same way each time— cards can load in a
different order each time the system is brought up.
This is normal and happens because the boot and load signals can catch different points on the
communications bus clock cycle. Moving media cards to different slots can also cause
variations. Media cards have different boot and diagnostic programs. For example, HIPPI
media cards take significantly less time to load and come up than do FDDI.
Reset GRF when all cables are attached
When all cables are in place, reboot the system. This will also reset all media cards.
Use the shutdown -r now or grms command described at the end of the chapter. That last
section describes ways to verify that your media cards are viable even though the system is not
yet fully configured.
SONET OC-3c multimode
62.5/125 micron fiber optic cables
SONET OC-3c single mode
9/125 micron fiber optic cables
Table 5-1. Media card cable specifications (continued)
Cables/Card
Description
