HP J8692-69001 | ProCurve 3500yl series 3500-24G-PoE yl 24 x RJ-45 Ports PoE 10/100/1000Base-T + 4 x SFP (mini-GBIC) Ports + 1 x Open Module Slot Layer 3 Managed Rack-Mountable Gigabit Ethernet Network Switch

Here are 12 technical specifications for the HP 3500YL Switch:

1. Switching capacity: 128 Gbps
2. Forwarding rate: 95.2 Mpps
3. MAC address table size: 16,000 entries
4. VLAN support: 4,096 maximum VLANs
5. Power over Ethernet (PoE) support: No
6. Quality of Service (QoS) support: Yes
7. Jumbo frame support: 9,216 bytes
8. Management interface: CLI, web-based GUI, SNMP
9. Security features: RADIUS, TACACS+, SSH, SSL
10. Redundancy features: Redundant power supply (optional)
11. Dimensions (W x D x H): 17.4 x 15.3 x 1.7 inches
12. Weight: 13.2 pounds

Helpful notes:
1. The HP 3500YL Switch is stackable up to 8 units.
2. The switch supports link aggregation for increased bandwidth and redundancy.
3. The expansion slot can be used for adding optional modules such as 10GbE uplinks or additional ports.