Magnum DS880 Dual-speed Stackable Hubs
Installation and User Guide(05/01)
1
www GarrettCom com
.
.
1.0 SPECIFICATIONS
1.1 Technical
Specifications
100 or 10 Mb/s per port, auto-sensing for speed. DS880 hubs support
two traffic domains, one at 100Mb/s and one at 10Mb/s, have eight RJ-45
ports, and are stackable up to 3 units high operating as one repeater.
Performance
When a port is operating at 100Mb/s:
Data Rate: 100 Mb/s
PDV (Path Delay Value) : 80BT, exceeds Class II
When a port is operating at 10Mb/s:
Data Rate: 10 Mb/s
Partitioning: Enforced after 63 consecutive collisions
Auto-reconnect: Occurs after one packet of error-free reception
Network Standards
100Mb: Ethernet IEEE 802.3u , 100BASE-TX
10Mb: Ethernet IEEE 802.3, 10BASE-T
Auto-sensing for speed: IEEE 802.3u
Packet-Processing Between Domains (internal 10/100 switch or bridge)
Filtering and Forwarding Rate from 100Mb ports: 148,800 pps max
Filtering and Forwarding Rate from 10Mb ports: 14,880 pps max.
Processing type : Store and Forward
Auto-learning : 8K address table, shared for both traffic domains
Packet buffers : 2MB,dynamically allocated & shared on both domains
Latency (not including packet time) : 100 to 10Mb : 5
µ
s
10 to 100Mb : 5
µ
s
CPU Type : State Machine
Maximum Ethernet Segment (or Domain) Lengths
10BASE-T (Unshielded twisted pair)
- 100 m (328 ft)
100BASE-TX (CAT 5 UTP)
- 100 m (328 ft)
Operating Environment
Ambient Temperature:
32
º
F to 122
º
F (0
º
C to 50
º
C)
Storage Temperature:
-20
º
C to 60
º
C
Ambient Relative Humidity: 10% to 95% (non-condensing)
Power Supply (Internal
)
AC Power connector : IEC-type, male recessed, rear of chassis
Power Input Voltage : 90 to 260 VAC (auto ranging)
Power Input Frequency : 47-63 Hz
Power Consumption : 20 watts max
.
