Comtrol VS3000S - Manual (Page 20)

20 Replacing Units in Service (“Hot-Swapping”)
Installing the Hardware
f. Use the following table to determine the problem if Steps a
through f did not occur.
7. Go to the appropriate VS-Link Installation section for your
operating system.
Replacing Units in Service (“Hot-Swapping”)
In the event that a VS3000 needs to be removed from service, it is
possible to replace it with another VS3000 without taking down the
network server.
For more information, including step-by-step instructions, see the
section titled “Replacing Units in Service” in the chapter of this guide
relating to your network operating system.
Primary and Backup Servers
Both the Windows NT and Novell versions of the VS-Link software
support primary and backup servers. That is, if you have multiple
servers on a network, one server is designated as the primary server
for a given VS3000, and one or more other servers can be designated
as backup servers for the same VS3000. In the event that the primary
server goes offline, the backup server automatically takes over control
of the VS3000 and restores ISDN service.
For more information on setting up primary and backup servers, see
the chapter of this guide relating to your network operating system.
Notes:
• Each VS3000 must have one and only one primary server.
• Each VS3000 can have several backup servers, and you can use the
recover time (NT) or polling time (Novell) to establish a hierarchy
for selecting which backup server to go to and in which order.
• The same server can be the primary server for some VS3000 units
and the backup server for other VS3000 units on the same network.
Table 3. LED Display for Fatal Errors
LEDs Lit Description
PORT 1: B1
Indicates a RAM self-test failure or other
mainboard error. Implemented at primary
BOOT level prior to dependency on RAM.
PORT 1: B1 & B2
Ethernet Controller hardware initialization
failure. Implemented at secondary BOOT
level during normal initialization.