Allied Telesis AT-MR912TX - Manual (Page 34)

Installation
14
Ventilation
All AT-MR912TX hubs have an internal fan and openings on both sides for
ventilation.
Note
Make sure the ventilation openings on the unit are not blocked.
Maximum ambient operating temperature is 122
°
F (50
°
C).
Maximum ambient storage temperature is from 14 ° F to 158 ° F (-10 °
C to 70
°
C).
Network Specifications
Table 6 provides an overview of IEEE 802.3 and 802.3u specifications for
10Base-T and 100Base-TX network configurations using twisted-pair wire.
Table 6:IEEE 802.3 and 802.3u Network Specifications
100Base-TX Cable
There are various grades of voice-quality and data-quality cables available.
These can appear to be similar externally, although their high-speed data
transmission characteristics are radically different.
The identification problem is made worse by some suppliers selling voice-
quality cables as data-quality cables.
If voice-quality cables are used in a 100Base-TX network system, data
movement may be slow, collision-prone or non-existent. To further confuse the
issue, interface indicators will usually indicate a valid link in such a case.
10Base-T 100Base-TX
Media Unshielded/Shielded
Twisted Pair
Category 3, 4, or 5
Unshielded/Shielded
Twisted Pair
Category 5 only
Topology Star, Tree Star, Tree
External Devices Network Adapter Card
Repeater
Network Adapter Card
Repeater
Maximum Segment Length 100 meters (328 feet) 100 meters (328 feet)