Transition Networks SM24TBT2DPB-2XPS-NA 24-Port Managed Gigabit PoE++ Switch
The Transition Networks SM24TBT2DPB-2XPS-NA is a 24-port managed Gigabit switch engineered for security and low-voltage integrators deploying networked IP cameras, access control readers, and VoIP phones from a single infrastructure. Every port delivers PoE++ power (95W max per port) alongside 10/100/1000 Mbps Gigabit data, eliminating the need for separate power injectors or external PoE supplies on fully equipped deployments. The managed switching platform, 8K MAC address table, and enterprise VLAN/QoS controls make it a centralized backbone for mid-market and large installations where power budgeting and network segmentation matter.
Key Features
- 24-Port PoE++ Delivery: All 24 ports support PoE++ (95W per port, up to 375W system total with redundant PSU). Powers high-draw devices—IP turrets with heaters, PTZ cameras, and dual-radio access points—without supplementary injectors.
- Gigabit Speeds (10/100/1000 Mbps): Line-rate switching across all 24 ports. Auto-negotiation ensures compatibility with legacy 10/100 devices while delivering full gigabit throughput to modern cameras and NVRs.
- 8K MAC Address Table: Stable performance in installations with 6,000–8,000 networked endpoints. Prevents MAC table exhaustion and associated switching fabric slowdowns common in flat-network deployments.
- Managed Platform (Layer 3): Enterprise-grade VLAN support, port mirroring (SPAN), QoS (802.1p priority queuing), and SNMP monitoring. Segment camera traffic from access-control and voice networks without additional hardware.
- Redundant Power Supply (2xPS): Dual PSUs with automatic failover. Single PSU failure doesn't bring down the switch—critical for 24/7 surveillance deployments.
- Rack-Mount Form Factor: Standard 1U chassis, black finish. Fits industry-standard 19-inch equipment cabinets alongside NVRs, UPS, and patch panels.
- 5-Year Limited Warranty: Manufacturer warranty covers hardware defects and parts replacement, reducing total cost of ownership on long-lived installations.
The SM24TBT2DPB-2XPS-NA consolidates power and switching into a single managed appliance, reducing bill-of-materials complexity and eliminating per-port injection costs. On a 24-camera installation with PTZ domes and heaters, unified PoE++ eliminates the capex and floor space for 24 separate midspan injectors. Gigabit bandwidth ensures that simultaneous 4K streaming from multiple cameras doesn't saturate uplink capacity to the NVR or core switch.
Layer 3 managed features enable traffic prioritization and segmentation. VLAN tagging keeps video streams isolated from access-control authentication traffic and VoIP signaling—a common integration scenario in multi-tenant or large enterprise deployments. Port mirroring sends a copy of all traffic from camera ports to a dedicated SPAN port, enabling inline packet capture or threat detection appliances without disrupting primary video flow. SNMP traps alert your network operations center to power-delivery anomalies (port disconnect, PSU failure) before integrators arrive on-site.
The 8K MAC table supports deployments with hundreds of IP cameras, access readers, intercoms, and phones. In installations where a single broadcast domain (no VLAN segmentation) spans 6,000+ devices, MAC table exhaustion causes the switch to flood unknown unicast frames—tanking throughput and creating operational confusion. Transition Networks' 8K table handles typical mid-market AV+security integration patterns without overflow management.
ONVIF-compliant IP cameras and access-control devices integrate seamlessly into the network via RJ45 termination. No proprietary cabling or firmware patches required. Managed switching interoperates with standard NVR platforms (Milestone, Genetec, Avigilon, Axis Camera Station) through native network discovery and SNMP monitoring. If your security architecture requires network segmentation (separate VLAN for cameras, another for access control), the SM24TBT2DPB-2XPS-NA provides that control without additional layer-3 appliances.
Eden PhillipsPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
We've deployed dozens of Transition Networks managed switches across mid-market and enterprise security installations. The SM24TBT2DPB-2XPS-NA strikes a practical balance between capability and complexity—it's not a core backbone switch (that's what you'd use for inter-building uplinks), but it absolutely owns the role of a security subnet aggregator. In integrations where you're feeding a single NVR or redundant NVR pair from 20–24 distributed cameras, this switch pays for itself by eliminating per-port PoE injection and giving you native VLAN/QoS controls that most security installers never need to touch but will thank you for when they do. The dual PSU design is the differentiator we always specify on high-availability jobs—a single PSU failure on a non-redundant switch kills power to every camera downstream, and with 24 PoE ports live, that's an operational incident. Transition Networks' approach removes that single point of failure without forcing you into a $15K+ core-grade platform.
Technical Highlights:
- PoE++ 95W per Port (375W system max with dual PSU): Eliminates midspan injector footprint and per-device power supply complexity. High-wattage devices (PTZ cameras with 24x optical zoom + IR heater, dual-radio PoE+ access points) draw 60–90W sustained; this switch powers all 24 simultaneously without derating. Industry-standard PoE negotiation (802.3bt) means legacy 10W devices and modern 90W devices coexist on the same switch without configuration.
- 8K MAC Address Table: Prevents MAC table exhaustion on mid-market AV integrations (300–500 devices per port × 24 ports = 7,200 potential MACs). Exhaustion causes flooding and latency spikes; this table size handles realistic deployments without overflow management overhead.
- Layer 3 VLAN Support: VLAN tagging (802.1Q) lets you logically separate camera, access-control, and voice traffic on the same physical switch without adding a separate router or firewall. QoS priority (802.1p) ensures video traffic doesn't starve during network congestion—real operational insurance on installations with dozens of streams and intermittent bandwidth spikes.
- Port Mirroring (SPAN): Mirror all traffic from specific ports to a single SPAN egress port. Enables packet capture, inline threat detection, or protocol analysis without breaking the primary video flow. Common use case: mirror all camera ports to a dedicated packet-capture appliance for forensic reconstruction.
- Redundant Power Supply (2xPS): Automatic PSU failover keeps the switch live if a single PSU fails. On 24/7 surveillance deployments, a PSU failure on a non-redundant switch is an operational incident; dual PSU removes that risk.
- SNMP Monitoring & Traps: Native SNMP agent reports port status, power-supply health, and temperature to your NOC or integrator dashboard. Port power-on/power-off events trigger SNMP traps—alerting you to PoE device disconnections before a camera goes dark.
Deployment Considerations:
- 375W system PoE budget assumes dual PSU. Single PSU configurations derate total available power; verify wattage budget before connecting 24 high-power cameras. Most integrators run 18–20 active PoE ports per unit to maintain headroom and redundancy.
- VLAN configuration requires managed switch expertise. If your team doesn't segment networks, leave VLAN features disabled (factory default) and use the switch as a transparent gigabit PoE++ bridge. Don't over-engineer if flat-network topology is already in place and working.
- Gigabit uplink to NVR or core switch is strongly recommended. If your NVR has only FastEthernet (100 Mbps) uplink, you'll bottleneck 4K streams from 4–6 simultaneous cameras. Verify NVR gigabit port availability before final cabinet installation.
- Thermal management: Mount in ventilated cabinet with intake/exhaust airflow. 24 PoE ports at full load dissipate substantial heat; passive cooling isn't sufficient. Standard 1U rack space with airflow accommodation is prerequisite.
- Power feed: Dual PSU requires two separate AC circuits or conditioned power taps (from separate UPS batteries if redundancy is a hard requirement). Single AC feed defeats redundancy benefit—spec dual-circuit power during design phase.
The SM24TBT2DPB-2XPS-NA is the right fit for integrators building out mid-market security networks (50–500 endpoints) where PoE consolidation, managed switching, and redundancy matter. It's overkill for small single-NVR deployments (4–8 cameras), and it's underpowered as a core backbone (no 10GbE uplink, no stacking), but for the sweet spot of 24-port PoE++ aggregation, it's a mature, field-proven workhorse. Check out the full Transition Networks catalog for additional managed and unmanaged PoE switch models.
