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Magnum 700X Mini-Concentrators Installation and User Guide (05/98)
GARRETT
13
2.3.7 RPM-TP (Twisted Pair)
The Magnum RPM-TP card supports Ethernet twisted pair segments of any standard
length. It is equipped with a single RJ-45 connector. The RJ-45 connector is shielded to
minimize emissions and will allow
both unshielded twisted pair (UTP)
and shielded twisted pair (STP)
segment connections.
The RPM-TP module is also
equipped with a slide switch to allow
for cascaded or up-link connections.
This feature eliminates the need for a
special twisted pair crossover cable.
Magnum RPM-TP
With the switch in the UP position, the RPM-TP port is used for up-link connections
(i.e.: a connection to another repeater or hub typically.) When used for segments going to
workstations and other user device connections, the switch should be in the DOWN position.
The RPM-TP will support 10BASE-T unshielded twisted pair wiring (UTP)
environments with maximum segment distances up to 100m (325 ft.), or shielded twisted pair
wiring (STP) of 150m (500 ft.). This module is designed with internal transceiver functionality.
The RPM-FST has LINK, PART, and RX LEDs.
Important Note:
For the RPM-TP MDI-X Crossover Switch -
DOWN
(or Right) for workstations and user connections.
UP
(or Left) for Up-Link connections to other hubs, etc.
The RJ-45 pins normally (TP crossover switch DOWN) are per the standard for hubs-to-users
twisted pair wiring: 1 = receive+, 2 = receive-, 3 = transmit+, 6 = transmit-, other pins not used.
When the TP crossover switch is UP, the pins of the RJ-45 port are per the standard for up-links
using twisted pair wiring, i.e., the transmit and the receive pairs are exchanged: 1 = transmit+, 2
= transmit-, 3 = receive+, 6 = receive-, other pins not used.
2.3.8 PM-FP
The PM-FP is a blank face plate that is installed in
any empty PM slot. When the Magnum 700X chassis contains
less than seven front-mounted PMs, the empty front slots must
be covered with the PM-FP face plate in order to maintain
proper cooling air flow, and for safety.
Magnum PM-FP
Shielded RJ-45
Connector
1
2
3
1
LINK Partition Receive
2
3
MDI-X
Cross-Over
Slide Switch
Note:
The Magnum
PM-FP must be installed
in each empty PM slot.