DGS-1216T Firmware Release Note  
Firmware: v4.10.06
Hardware: D1
Date: Dec. 10th, 2007

Problems Resolved:
1. Fix the bug if users enabled SNMP Trap settings after few hours of operation that switch will not respond the Ping or Web request, but the packet switching works normally.
2. Fix the issue when generating lot of leave messages in IGMP snooping, the switch will not respond the Ping or Web request after few hours of operation.
3. Fix the bug of invalid VLAN group setting over 64 groups
4. Fix the bug of invalid IGMP parameter settings, especially for Query Interval, Max Response Time, Robustness Variable and Last Member Query Interval.

Enhancements:
No
==============================================================
Firmware: v4.10.02
Hardware: D1
Date: Sept. 28, 2006

Problems Resolved:
1. Fix the bug if users enabled both SNMP and STP after few hours of operation that switch will work abnormally with system LED stop blinking or network crash.

Enhancements:
No

Note: 
1. The firmware v4.10.02 is not backward compatible with previous hardware v.B1/C1.
2. Please follow up the “Upgrade New Firmware Procedure” sheet to upgrade this new firmware. 
3. Once the device is upgraded new firmware, it can't be downgraded to old firmware version.
4. Once the device is upgraded new firmware, all the configuration setting is reset to default.
================================================================
Firmware: v4.00.12
Hardware: D1
Date: May. 24, 2006

Problems Resolved:
No

Enhancements:
1. Brand new black & silver outlook and new Web GUI
2. Hardware is compliant with RoHS
3. Reduce the quantity of fan from two to one.
4. The maximum length of Jumbo Frame is up to 10240 Bytes
5. Support IGMP snooping
6. Support 802.1x Port-based Access Control
7. Support Broadcast Storm Control
8. Support Static Mac
9. Support Safeguard Engine 
10. Support DHCP client for both Web GUI and SmartConsole Utility
11. Can reboot switch via Web GUI
12. Support firmware Backup and Upoad via Web GUI
13. When enabling flow control, there will be a pop up window warning “the QoS may not be able to perform accurate bandwidth allocation”.

Note: 
5. The firmware v4.00.12 is not backward compatible with previous hardware v.B1/C1.
================================================================
Firmware: v4.00.07 (Only for Europe)
Hardware: D1
Date: April. 12, 2006

Problems Resolved:
No

Enhancements:
1. Hardware is compliant with RoHS.
2. The maximum length of Jumbo Frame is up to 10240 Bytes
3. Support IGMP snooping
4. Support 802.1x Port-based Access Control
5. Support Broadcast Storm Control
6. Support Static Mac
7. Support Safeguard Engine 
8. Support DHCP client for both Web GUI and SmartConsole Utility
9. Can reboot switch via Web GUI
10. Support firmware Backup and Restore via Web GUI

Note: The firmware v4.00.07 is not backward compatible with previous hardware v.B1/C1.
=================================================================
Firmware: v3.00.17
Hardware: C1
Date: August. 29, 2005

Problems Resolved:
No

Enhancements:
11. Migrate Port-based QoS to 802.1Q QoS 
12. Migrate Port-based VLAN to 802.1Q Tag-VLAN 
13. Support SNMP v1(Private MIB,RFC1213)
14. Support Jumbo Frame(Maximum length is 9000bytes)
15. Support 802.1D Spanning Tree function

=================================================================
Firmware: v2.00.06
Hardware: C1
Date: Sep. 29, 2004

Problems Resolved:
No

Enhancements:
1. Add "Clear Counters" Button for "Statistics" page.

Firmware: v2.00.05
Hardware: C1
Date: Aug. 27, 2004

Problem Resolved:
1. First release version.