Black Box Dual-Speed Stackable Hubs
Installation and User Guide (04/99)
1
1.
Technical Specifications
Performance
(hub supports both 10 and 100Mbps domains, ports individually selected)
When a port is operating at 100Mbps
Data
Rate:
100Mbps
PDV (Path Delay Value): 80BT, exceeds Class II
When a port is operating at 10 Mbps :
Data Rate: 10 Mbps
Partitioning: Enforced after 63 consecutive collisions
Auto-reconnect: Occurs after one packet of error-free reception
Network Standards
100Mbps : Ethernet IEEE 802.3u , 100BASE-TX, 100BASE-FX, 100BASE-SX
10 Mbps : Ethernet IEEE 802.3, 10BASE-T, 10BASE-FL
RJ-45 ports are auto-sensing for speed: IEEE 802.3u
Packet-Processing Between Domains (internal 10/100 switch or bridge)
Filtering and Forwarding Rate from 100Mbps ports : 148,800pps max
Filtering and Forwarding Rate from 10 Mbps ports : 14,880pps 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 10 Mbps : 5
μ
s
10 to 100Mbps : 5
μ
s
CPU Type : State Machine
Maximum Ethernet Segment (or Domain) Lengths
10BASE-T (CAT 3, 4, 5 UTP)
- 100 m (328 ft)
100BASE-TX (CAT 5 UTP)
- 100 m (328 ft)
Shielded twisted pair
- 150 m (492 ft)
10BASE-FL multi-mode fiber optic
- 2 km (6,562 ft)
10BASE-FL single-mode fiber optic
- 10 km (32,810 ft)
100BASE-FX, half-duplex:(multi-mode)
- 412 m (1350 ft)
100BASE-SX, short wavelength hdx (m.m.) - 300 m ( 935 ft)
100BASE-FX, full duplex:(multi-mode)
- 2.0 km (6,562 ft)
100BASE-FX, half-duplex:(single-mode)
- 412 m (1350 ft)
100BASE-FX, full duplex:(single-mode)
- 15.0 km (49,215 ft)
See also “Power Budgets”, Section 4.5 of this manual
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, AC (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 :
25 watts typical, 30 watts max. P.S. rating
