Copyright 2017 Positron, Inc.
12
2.3.5
Type 2a and Type 2b, POE
720930xxx TeleLite POE
(CFJ)
Ethernet Card Fed by On-Site Modem
A. If the 720930xxx POE Ethernet card is to be powered by a local source of -48Vdc then the
two on-board Power Option Jumpers should be set in the LOCAL PWR position. (Figure
17)
B. If the 720930xxx card was to be powered by POE from the feeding modem (or CFJ) the
Power Option Jumpers should be set to the remote power (RMT PWR) positions. (Figure
17)
C.
In a “Campus” Ethernet transport configuration, either the OEI (720920xxx) or CFJ
(720930xxx) can be set to Master or Slave since both ends of the transport can be
assumed to be attended for alarming purposes. The only criterion is that one card must be
set to Slave and the other to Master. (Figure 19) In this example, the CFJ (720930xxx)
TeleLite Ethernet card has been set as Master.
D. This is a Type 2 (a or b) deployment so the 2
nd
DIP switch should be set to the right,
accordingly. (Figure 19)
E. If the Ethernet modem that is feeding the TeleLite Ethernet card or that is being fed by the
TeleLite Ethernet cards is MDIX enabled
(4)
, then the MDIX feature of the TeleLite Ethernet
card should be disabled. If the associated modems are NOT MDIX enabled, then this DIP
switch should be enabled to remove any need for crossover cables. With this feature
enabled or disabled appropriately, there is never a need with TeleLite Ethernet cards to
provision the site with anything but a straight CAT 5 cable. In this example the Ethernet
Modem is MDIX enabled and the feature on the TeleLite Ethernet card is disabled. (Figure
19)
F. Since the 720930xxx is a POE Ethernet card, the PSE DIP Switch (4
th
) on this card should
always be in the PSE Disabled position. (Figure 19)
4
defines a
medium dependent interface crossover
(MDI-X) interface.
Auto MDI-
X
ports on newer network interfaces detect if the connection would require a crossover, and automatically chooses
the MDI or MDI-X configuration to properly match the other end of the link.
Figure 18: Default DIP Switch Positions
720930SSC POE
TeleLite Card (CFJ)
Figure 17: Power Setting,
Meeting Condition A
Figure 19: Meeting conditions C, D, E & F
