The SuperStack™ II Hub 10 24 Port TP (3C16671A) has 24 dedicated
twisted pair ports on the front panel and an AUI port on the rear panel.
The rear panel also has a slot for a 3Com Transceiver Module or Bridge
MicroModule; if fitted the Module will operate in addition to the AUI
port. A range of different media Transceiver Modules is available from
3Com (see
The Hub 10 24 Port TP can be stand-alone or linked with other Hub 10,
LinkBuilder FMS II, FMS, 10BT or 10BTi units to form a stack of units of
different media. Each stack is the equivalent to a single IEEE 802.3
repeater, so stacking units gives you the benefit of a higher port count.
The Hub 10 24 Port TP is suited for office use where it can be
wall-mounted, rack-mounted, or free standing. Alternatively, the unit can
be rack-mounted in a wiring closet or equipment room. A mounting kit
is supplied.
The Hub 10 24 Port TP can be powered either from the AC mains supply,
or through an optional 3Com Redundant Power System (3C565047) to
provide a more reliable supply. Contact your supplier for details.
Repeater Functions
The Hub 10 24 Port TP has been designed to conform to the IEEE 802.3
standard for Local Area Networks, and provides all the standard
functions of an 802.3 repeater, including:
■
Signal retiming
■
Preamble regeneration
■
Fragment extension
■
Automatic partition/reconnection
Management
A SuperStack II Hub 10 Management Module (3C16630A) or Advanced
RMON Module (3C16632) can be fitted to the Hub 10 24 Port TP to
provide
f
ull SNMP management
, including statistics, resilient links and
security features
. Only one Management Module or Advanced RMON
Module is required for each stack. Refer to the guides accompanying the
module for details on how to manage an Hub 10 unit or stack.
Resilience and Security
H
ub 10 Management Module (3C16630A) and Hub 10 Advanced RMON
Module (3C16632) offer resilience
and security f
eatures.
U
p to 16 resilient link pairs can be configured via management software.
To avoid the creation of loops during power-up, Hub 10 units provide a
Disable On Boot switch. If this switch is set to disable, all TP ports on the
unit will be disabled during power-up until they are correctly configured
and enabled by management software. This is only necessary on units
which have ports assigned as standby. Standby ports in resilient link
pairs can only be configured on SuperStack II Hub 10 or LinkBuilder
FMS II units.
Security features are described in the manual which comes with your
Hub 10 Management Module.
B
y disabling ports on boot up and enabling them with management
software, you provide extra security for the unit.
During the power up sequence, the main ports (on the front
panel) are disabled BUT the AUI port and Transceiver Module
port will be enabled for periods of up to 1 second. During this
brief moment, the AUI and Transceiver Module ports are NOT
secure.
Network Connections
You can connect the Hub 10 24 Port TP to any Data Terminal Equipment
(DTE) fitted with a 10Base-T network adapter or a 10Base-T transceiver.
Connect one end of the twisted pair cable to the RJ45 port on the unit
and the other end to the RJ45 port on your network adapter or
transceiver. You can attach up to 24 twisted pair segments to the front
of the unit.
The Hub 10 24 Port TP can use both shielded 150ohm, and unshielded
or shielded 100ohm twisted pair cables. To remain within 802.3 10Base-T
rules the maximum length of cable between the unit and any DTE
should not be greater than 100m (110 yards). Consult your supplier's
technical support department if you need to use twisted pair cables
over greater distances.
You can connect any 802.3 transceiver to the unit using an AUI cable
connected to the AUI port on the rear panel. Also, you can fit one of the
3Com Transceiver Modules or a Bridge MicroModule into the slot on the
rear panel (see
You can connect the Hub 10 24 Port TP to any other 10Base-T repeater
using port 24, to form an inter-repeater link. You must switch port 24 to
MDI to bypass the internal cross-over normally implemented by
10Base-T unit ports: see
Important
To manage this hub, you
may n
eed
a new v
ersion of the agent
software
installed on y
our Management Module.
See
for details.
Numbered elements in this diagram refer to numbered sections in the text.
These numbers, in bold, are used as references.
I
NTRODUCTION
H
OW
TO
U
SE
THE
H
UB
10
i
