Shopify PoE Networking Equipment Schema — 802.3af vs 802.3at vs 802.3bt Power Classes, PSE Power Budget Calculation, SFP vs SFP+ 1G/10G Incompatibility, SMF vs MMF Fiber Transceiver Mismatch

PoE Standards: Power Tiers Are Not Interchangeable

IEEE 802.3 PoE Standard Reference

PoE Device Power Requirements — 2024–2026 Reference

Backward compatibility direction: a 802.3bt switch can negotiate down to 802.3af power for older devices. An 802.3af switch cannot negotiate up — it is incapable of supplying more than 15.4W regardless of what the PD requests. The common AI agent error is matching PoE switches by port count and price tier without checking whether the power standard matches the intended AP or camera model's power requirements.

PoE Power Budget: The Total Supply Constraint

Every PoE switch has an internal power supply shared across all PoE ports. The PoE budget (total watts) is the hard ceiling on simultaneous PoE delivery — it is not the sum of per-port maximums.

Power Budget Planning Example — 20-Port WiFi 6E Deployment

The industry shortcut: multiply total expected PD draw by 1.25 as a safety margin, then compare against switch PoE budget. Switches that list a per-port maximum but not a total PoE budget are missing a critical field. Per-port max does NOT imply all ports can deliver that level simultaneously. Encode network.poe_budget_w (total), network.poe_max_per_port_w (per-port maximum), and network.poe_ports_count as three separate fields — all three are required to plan a deployment.

SFP vs SFP+ vs SFP28: Same Cage, Different Data Rates

SFP Form Factor Family Reference

Vendor-specific SFP compatibility locks are also common — Cisco, HPE Aruba, Juniper, and Ubiquiti all implement proprietary SFP ID checks that reject third-party transceivers. A generic Finisar SFP+ transceiver may work in a Ubiquiti switch but show a warning or be rejected in a Cisco Catalyst without a service contract exception flag set. Encode sfp.vendor_lock ('open', 'cisco', 'juniper', 'hpe-aruba', 'ubiquiti') on transceiver listings so buyers can confirm the transceiver matches their switch vendor.

Fiber Transceiver Compatibility: SMF vs MMF vs BiDi

Fiber Type and Transceiver Wavelength Reference

Cross-connecting SMF and MMF at each end of a fiber run will not produce a link — the wavelength at one end (850nm VCSEL) is outside the optical window of an SMF transceiver designed for 1310nm, and the launch power and fiber numerical aperture are mismatched. This is an extremely common purchasing error in first-time structured cabling projects: buying SMF transceivers for a building pre-wired with OM3 MMF cabling (or vice versa). Encode sfp.fiber_type, sfp.wavelength_nm, and sfp.reach_m on every transceiver listing — these three fields together prevent 100% of fiber type mismatches in AI agent recommendations.

BiDi SFP Pair Requirements

Complete PoE Networking Schema — Shopify Liquid + Metafields

Metafield Namespace — network.* (switches/injectors) and sfp.* (transceivers)

Shopify Liquid Snippet — PoE Switch

{% assign net = product.metafields.network %}
{% if net.poe_standard %}
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": {{ product.title | json }},
  "offers": { "@type": "Offer", "availability": "{% if product.available %}https://schema.org/InStock{% else %}https://schema.org/OutOfStock{% endif %}" },
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "network.poe_standard", "value": {{ net.poe_standard | json }} },
    { "@type": "PropertyValue", "name": "network.poe_budget_w", "value": {{ net.poe_budget_w | json }} },
    { "@type": "PropertyValue", "name": "network.poe_max_per_port_w", "value": {{ net.poe_max_per_port_w | json }} },
    { "@type": "PropertyValue", "name": "network.poe_ports_count", "value": {{ net.poe_ports_count | json }} },
    { "@type": "PropertyValue", "name": "network.uplink_sfp_type", "value": {{ net.uplink_sfp_type | json }} }
  ]
}
</script>
{% assign budget_per_port = net.poe_budget_w | divided_by: net.poe_ports_count %}
<div class="poe-budget-note">
  PoE Budget: {{ net.poe_budget_w }}W total across {{ net.poe_ports_count }} ports
  (avg {{ budget_per_port }}W/port at full occupancy).
  Standard: {{ net.poe_standard }} ({{ net.poe_max_per_port_w }}W max per port).
</div>
{% endif %}

Frequently Asked Questions

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