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Grandstream HT814 v2: four FXS ports, profiles and firmware boundaries

Keep four analog ports, two SIP profiles, hunting behavior, integrated routing, fax modes and the V2 firmware family as separate evidence.

Reviewed 2026-10-24Grandstream exact-model product pages and datasheets, current HT81x V2 administration and user guides, firmware 1.0.15.3 release notes dated September 17, 2026, and the current firmware-upgrade guide were reviewed October 24, 2026. Exact V2 identity, hardware and software component versions, network role, FXS port, SIP profile, SIP identity, registration, hunting-group membership, analog electrical path, signaling, media, fax negotiation, provisioning state and completed call or fax remain separate evidence. Published firmware is not proof of the installed build, provider approval or a successful change. No adapter, analog telephone, fax device, cable, line voltage, ring cadence, caller ID, switch, router, SIP service, PBX, account, packet, call, fax, firmware image, price, availability, compatibility, support entitlement or vendor response was inspected or testedFoundationalDocumentation based · not lab tested

Documented specifications

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Grandstream · Grandstream maintains an exact-model product page, current HT81x V2 guides and current V2 firmware records. Those records do not establish local stock, a remaining global support term, provider approval or the build installed on a particular adapter.

HT814 v2: manufacturer-sourced facts
SpecificationDocumented value
Analog ports4 RJ11 FXS ports; physical ports are not SIP profiles, identities or simultaneous calls Source ↗
SIP profiles2 SIP profiles assignable across four FXS ports; profile assignment and per-port registration require separate confirmation Source ↗
NetworkTwo 10/100/1000 Ethernet ports; NET1 defaults to WAN and NET2 to LAN, with an integrated NAT-router mode Source ↗
Routing boundaryProduct material states routing up to 100 Mbps; port link speed and routing throughput are different measurements Source ↗
Fax modesT.38 up to 14.4 kbps and G.711 pass-through are listed capabilities, not proof of successful fax negotiation Source ↗
ProvisioningTR-069 and XML provisioning are listed; request, download, apply, reboot and effective state remain separate Source ↗
Firmware familyHT814 V2 uses the HT81x V2 firmware family; release 1.0.15.3 is dated September 17, 2026 Source ↗
Downgrade boundaryAfter 1.0.9.3 or later, downgrade to 1.0.7.5 or earlier is not supported because of CPU-frequency adjustments Source ↗

Unlisted fields remain unverified. Platform compatibility and remaining support life require confirmation for the exact ordered model.

Resolve HT814 V2 identity before touching all four ports

Record the printed HT814 V2 label, part and hardware identifiers, serial or MAC, and each software component version on the status page. Do not apply original-HT814 instructions or infer identity from port count alone. Exact V2 identity is the gate for configuration and firmware.

Current product, guide and release pages show published support material, not the installed build, local stock, provider approval or remaining service coverage.

Map four FXS ports onto two profiles deliberately

HT814 V2 has four physical FXS ports but two SIP profiles. A port can select a profile and hold its own SIP identity, while hunting groups can change how member ports place calls through an active account. Four jacks therefore do not imply four independent profiles, registrations or simultaneous calls.

Create a port table with attached device, profile, SIP User ID, Authenticate ID, registration, hunting membership and inbound and outbound policy. Check effective state rather than assuming a saved value applied.

Separate Ethernet link speed from integrated routing

NET1 and NET2 are Gigabit Ethernet interfaces, defaulting to WAN and LAN roles respectively, while the product material states integrated routing up to 100 Mbps. Treat switch link, address assignment, router mode, NAT and application throughput as different observations.

Record the chosen topology and upstream NAT before enabling another routing boundary. Then verify DNS, time, provisioning, registration, signaling and media in sequence.

Diagnose one analog port without generalizing to the other three

The status page exposes FXS-port state for ports 1 through 4, and the LEDs distinguish unregistered, registered, off-hook or busy, and voicemail indication. None proves analog voltage, ringing, wiring, impedance, caller ID, DTMF or media quality.

Move a known authorized analog device and cable only as a controlled comparison. Record which fault follows the device, cable, port, profile or identity; do not erase the evidence by changing several ports at once.

Treat voice and fax acceptance as separate

T.38 and G.711 pass-through are listed capabilities. Fax success still depends on the selected FXS port, codec or relay negotiation, provider and PBX path, network impairment and both fax endpoints. A clean voice call does not prove fax, and a registered port does not prove either.

Capture signaling, negotiated mode, relevant packet evidence and endpoint result pages for each intended path. Avoid compatibility claims beyond the cited capability and observed deployment evidence.

Control V2 updates and the irreversible downgrade edge

The September 17, 2026 release notes list firmware 1.0.15.3 for HT8xx V2 and the HT81x V2 image family covers HT814 V2. Grandstream warns that after upgrading to 1.0.9.3 or later, downgrade to 1.0.7.5 or earlier is unsupported because of CPU-frequency adjustments.

Preserve exact model, current components, configuration, source, image and release-record hash, authorization, pilot, window and recovery. Confirm effective firmware, all four port mappings, registrations, calls and fax behavior after the change.

Sources & applicability

Primary references for the technical details above. Operational examples and planning checklists are VoIP.info editorial guidance.

Examples require adaptation to your topology. No live PBX or hardware testing is claimed.

Continue your research

Troubleshooting · Grandstream exact-model product pages and datasheets, current HT81x V2 administration and user guides, firmware 1.0.15.3 release notes dated September 17, 2026, and the current firmware-upgrade guide were reviewed October 24, 2026. Exact V2 identity, hardware and software component versions, network role, FXS port, SIP profile, SIP identity, registration, hunting-group membership, analog electrical path, signaling, media, fax negotiation, provisioning state and completed call or fax remain separate evidence. Published firmware is not proof of the installed build, provider approval or a successful change. No adapter, analog telephone, fax device, cable, line voltage, ring cadence, caller ID, switch, router, SIP service, PBX, account, packet, call, fax, firmware image, price, availability, compatibility, support entitlement or vendor response was inspected or tested

Grandstream HT812 V2 or HT814 V2 port registers but phone, fax or audio fails

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Device reference · Grandstream exact-model product pages and datasheets, current HT81x V2 administration and user guides, firmware 1.0.15.3 release notes dated September 17, 2026, and the current firmware-upgrade guide were reviewed October 24, 2026. Exact V2 identity, hardware and software component versions, network role, FXS port, SIP profile, SIP identity, registration, hunting-group membership, analog electrical path, signaling, media, fax negotiation, provisioning state and completed call or fax remain separate evidence. Published firmware is not proof of the installed build, provider approval or a successful change. No adapter, analog telephone, fax device, cable, line voltage, ring cadence, caller ID, switch, router, SIP service, PBX, account, packet, call, fax, firmware image, price, availability, compatibility, support entitlement or vendor response was inspected or tested

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Keep two analog ports, two SIP profiles, integrated routing, registration, T.38, provisioning and the V2 firmware family as separate evidence.

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Grandstream maintains an exact-model product page, current HT81x V2 guides and current V2 firmware records. Those records do not establish local stock, a remaining global support term, provider approval or the build installed on a particular adapter.

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