D-Link DGS-1210-28P 28-Port Gigabit PoE Smart Managed Switch

General Specifications

Port Configuration:

• 24 x 10/100/1000 Mbps PoE+ ports
• 4 x Gigabit SFP ports (or RJ45/SFP COMBO ports depending on revision)

Port Standards:

• IEEE 802.3 10BASE-T Ethernet
• IEEE 802.3u 100BASE-TX Fast Ethernet
• IEEE 802.3u 100BASE-FX (fiber)
• IEEE 802.3ab 1000BASE-T Gigabit Ethernet
• IEEE 802.3z 1000BASE-X (fiber)
• IEEE 802.3az Energy-Efficient Ethernet (EEE)
• IEEE 802.3x Flow Control
• IEEE 802.3af/at PoE/PoE+ compliance

PoE Specifications – Critical Differences

Document 5 (appears to be older revision):

• PoE Standards: Ports 1-4 compliant with 802.3at (30W), Ports 5-24 compliant with 802.3af (15.4W)
• PoE Power Budget: 193W

Document 4 (Rev. F – newer):

• PoE Standards: All Ports 1-24 compliant with 802.3at (PoE+, up to 30W each)
• PoE Power Budget: 193W

Performance Specifications

Switching Capacity: 56 Gbps (non-blocking)

MAC Address Table:

• Document 4 (Rev. F): 8K entries
• Document 5: 16K entries

Static MAC Addresses: 256 entries

Max. 64 Byte Packet Forwarding Rate: 41.7 Mpps

Packet Buffer Memory:

• Document 4 (Rev. F): 4.1 Mbits
• Document 5: 1.5 MB

CPU Memory:

• Document 4 (Rev. F): DDR3 128 MB
• Document 5: DDR3 128 MB

Flash Memory:

• Document 4 (Rev. F): 32 MB
• Document 5: 16 MB

Transmission Method: Store-and-forward

Physical & Environmental Specifications

Dimensions (W x D x H):

• Document 4 (Rev. F): 17.3″ x 9.8″ x 1.73″ (440 x 250 x 44 mm)
• Document 5: 17.32″ x 8.27″ x 1.73″ (444 x 210 x 44 mm)

Weight:

• Document 4 (Rev. F): 8.3 lbs (3.75 kg)
• Document 5: 5.60 lbs (2.54 kg)

Power Consumption:

Specification	Document 4 (Rev. F)	Document 5
Max. (PoE On)	263.9W @ 100V / 247.4W @ 240V	251.3W
Max. (PoE Off)	30.6W @ 100V / 28.1W @ 240V	26.3W
Standby	19.6W @ 100V / 16.6W @ 240V	24W @ 100V / 21.9W @ 240V

Heat Dissipation:

• Document 4 (Rev. F): 900.36 BTU/hr @ 100V / 844.23 BTU/hr @ 240V
• Document 5: 840.89 BTU/hr

Cooling:

• Document 4 (Rev. F): 2 smart fans (adjustable speed)
• Document 5: Smart fans

Acoustics:

• Document 4 (Rev. F): High speed: 51.7 dB(A) / Low speed: 44.9 dB(A)
• Document 5: High speed: 52.4 dB(A) / Low speed: 47 dB(A)

Operating Temperature: -5°C to 50°C (23°F to 122°F)

Operating Humidity: 0% to 95% non-condensing

MTBF:

• Document 4 (Rev. F): 469,262 hours
• Document 5: 239,236 hours

Layer 3 Features – Important Difference

Static Routing:

• Document 4 (Rev. F): 124 IPv4 entries / 50 IPv6 entries
• Document 5: Not available on DGS-1210-28P (only on 28MP model)

Software Features Comparison

Jumbo Frame Support:

• Document 4 (Rev. F): Up to 10,000 bytes
• Document 5: Up to 9,216 bytes

Bandwidth Control Granularity:

• Document 4 (Rev. F): 16 Kbps minimum
• Document 5: 64 Kbps minimum

IP Interfaces:

• Document 4 (Rev. F): Supports 4 interfaces
• Document 5: Supports 1 interface

Spanning Tree:

• Document 4 (Rev. F): 802.1D STP, 802.1w RSTP, 802.1s MSTP
• Document 5: 802.1D STP, 802.1w RSTP (MSTP only on 28MP)

Dual Image/Configuration:

• Document 4 (Rev. F): Supported
• Document 5: Only on 28MP model

Recommended Compatible SFP Modules

• DEM-310GT: 1000BASE-LX SFP (Single-mode, 10 km)
• DEM-311GT: 1000BASE-SX SFP (Multi-mode, 550m)
• DEM-312GT2: 1000BASE-SX SFP (Multi-mode, 2 km)
• DGS-712: 1000BASE-T SFP Transceiver

Key Takeaway

Hardware Revision F (Document 4) appears to be the newer, enhanced version with:

•  Full PoE+ on all 24 ports (not just ports 1-4)
•  More MAC address table entries (8K vs 16K – note: Document 5 shows 16K)
•  Larger flash memory (32 MB vs 16 MB)
•  Static routing support built-in
•  Dual image/configuration support
•  More IP interfaces (4 vs 1)
•  Better buffer memory (4.1 Mbits)