CTI Products EXB-IP Ethernet System Extender - Manual (Page 48)

CTI Products, Inc. EXB-IP User Guide
Appendix E - Troubleshooting 48
Table E4
If the ETH RX LED (on
local EXB-IP module)
. . .
REASON CORRECTIVE ACTION
Occasionally blinks on, then
off.
Normal operation indicating a message
packet has been detected on the IP
network.
Go to next Table.
Does not illuminate when
“RSVC” button on remote
EXB-IP module is
pressed.
1. Ethernet port is not terminated correctly
to the IP network.
2. If Unicast/Replicated addressing mode is
being used, IP addresses for local and
remote EXB-IP module are not
compatible.
3. If Multicast addressing mode is being
used, IP network routers or switches are
not configured properly.
1a. Verify that OPTION switch positions 7
and 8 are set correctly for the Ethernet
connector being used. See
I
NSTALLATION section.
b. Verify that the cable from EXB-IP
module Ethernet port is terminated
correctly to IP network. Check the
‘connection’ LED that is found near
each port on most IP interconnect
devices.
c. Verify that the correct cross or straight-
through cable is being used. See
“Appendix F. IP Addresses”.
2a. Verify that portion of IP addresses
identified by Subnet Mask for both
local and remote EXB-IP modules are
identical.
3a. Verify that IP routers and switches
have Multicast mode enabled.
b. Verify that IP routers are programmed
to pass the IP multicast address of the
EXB-IP module.
c. Verify that IP routers are programmed
to pass the proper destination
(configurable) and source (1283) UDP
Port numbers used by the EXB-IP
modules in the channel.