Appendix B - Technical Specifications
Hardware Specifications
Key Components / Performance
Switching Capacity: 20Gbps
Max. Forwarding Rate: 14.88Mpps
Forwarding Mode: Store and Forward
Packet Buffer memory: 4.1M bit
DDR for CPU: 128M Bytes
Flash Memory: 16M Bytes
Port Functions
8 10/100/1000Base-TX ports compliant
with the following standards:
- IEEE 802.3
- IEEE 802.3u
- IEEE 802.3ab
- IEEE 802.3az
- Supports Half/Full-Duplex operations
- IEEE 802.3x Flow Control support for Full-
Duplex mode
- Auto MDI/MDIX
- Auto-negotiation
2 SFP port supporting SFP Transceivers
- DEM-310GT (1000BASE-LX, 10km)
- DEM-311GT (1000BASE-SX, 550m)
- DEM-314GT (1000BASE-LH, 50km)
- DEM-315GT (1000BASE-ZX, 80km)
- DEM-312GT2 (1000BASE-SX, 2km)
- DEM-210 (100BASE-FX, 15km)
- DEM-211 (100BASE-FX, 2km)
- DEM-302s-LX (1000BASE-LX, 2km)
- DGS-712 (1000Base-T)
2 SFP port supporting WDM
Transceivers
- DEM-330T (1000Base-BX,TX-1550/RX-
1310nm, 10km)
- DEM-330R (1000Base-BX,TX-1310/RX-
1550nm, 10km)
- DEM-331T (1000Base-BX,TX-1550/RX-
1310nm, 40km)
- DEM-331R (1000Base-BX,TX-1310/RX-
1550nm, 40km)
- DEM-220T (100Base-BX, TX-1550/RX-
1310nm, 20km)
- DEM-220R (100Base-BX, TX-1310/RX-
1550nm, 20km)
- DEM-302S-BXD (1000BASE-BX, TX-
1550/RX-1310nm, 2km)
- DEM-302X-BXU (1000BASE-BXU, TX-
1310/RX-1550nm, 2km)
Physical & Environment
AC input, 100~240 VAC, 50/60Hz,
internal universal power supply
Acoustic Value: 0dB (Fan-less)
Operation Temperature -5~50°C
Storage Temperature -40~70°C
Operation Humidity: 10%~90% RH
Storage Humidity: 5%~90% RH
Emission (EMI) Certifications
CE Class B
Safety Certifications
cUL, LVD
Features
L2 Features
Supports up to 8K MAC address
Supports 256 static MAC
IGMP snooping:
- Supports 256 IGMP Snooping group
(shared with MLD Snooping)
- Supports at least 256 static multicast
groups (shared with MLD Snooping)
Limited IP Multicast:
- Supports up to 48 profiles (32 profiles for
IGMP, 32 profiles for MLD) each profile
can add up to 32 multicast groups
- Able to configure the maximum multicast
group number for a port, ranging from 1-
32
MLD Snooping:
- Supports 256 MLD snooping group
(shared with IGMP Snooping)
- Supports 256 static multicast
addresses
(shared with IGMP Snooping)
Loopback Detection
Port mirroring
SNTP
LLDP
VLAN
802.1Q VLAN
Total 32 static VLAN groups
Management VLAN
ISM VLAN
Supports Port-based Q-in-Q
QoS (Quality of Service)
Be able to classify packets according to
follow contents:
- 802.1p priority