Moray.book Page 11 Wednesday, December 18, 2002 3:00 PM
Installing the GL Modules
Module
Cable Type
Maximum Length
100-FX MTRJ GL Module
multimode
fiber-optic
•
full-duplex
cables that are fitted with
connections:
MT-RJ connectors.
2 kilometers
•
half-duplex
connections:
412 meters
N o t e
Automatic Cable Sensing on Twisted Pair Ports:
When the ports for the 10/100-TX GL Module and the 100/1000-T GL Module
are in their default configuration,
Auto
, both modules automatically negotiate
whether the ports operate as MDI or MDI-X, depending on the cable type and
the connected device’s operation. As a result, you can use either “straight
through” or “crossover” twisted-pair cable for all network connections to
these modules.
On the 10/100-TX GL Module, this feature is identified as
HP Auto-MDIX
; on
the 100/1000-T GL Module, it is identified as
Auto MDI/MDI-X
and it is part
of the IEEE 802.3ab standard. Both features operate the same.
Operation of this feature depends on the port configurations being kept at
Auto
.
If the configuration is changed to one of the available fixed options though
(for example, 100-Full Duplex), the port operates as an MDI-X port. In that
case, to connect the module to another switch or hub, use a crossover cable;
to connect to an end node, use a straight-through cable.
11
2
3
1
4
5
6
7
8
9
10
11
12
Link|Mode
100Base-FX MTRJ Ports
1
2
3
4
5
6
7
8
9
10
11
12
hp
procurve
100-FX MTRJ
gl module
J4892A
gl
module
multimode fiber-optic cable
with MT-RJ connector
100-FX port with
MT-RJ connector
