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Grandstream HT818 V2: eight FXS ports, two profiles and routed topology

Keep eight analog ports distinct from two SIP profiles, dual-Gigabit routing, hunting, line-test evidence, provisioning and the HT81x V2 firmware image.

Reviewed 2026-10-24Grandstream exact-model HT802 V2 and HT818 V2 product pages and datasheets, current HT80x V2 and HT81x V2 administration and user guides, and firmware 1.0.15.3 release notes dated September 17, 2026 were reviewed October 24, 2026. Exact V2 model, hardware, component versions, firmware binary family, network topology, FXS port, profile, identity, registration, hunting role, analog behavior, signaling, media, fax mode, provisioning state and accepted service remain separate evidence. Published firmware and management capabilities do not prove the installed build, provider approval, successful change, compatibility, capacity or availability. No adapter, analog device, cable, line condition, network, VLAN, router, account, PBX, packet, call, fax, image, checksum, price, inventory, 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 inventory, global remaining support, provider approval or the build installed on an individual gateway.

HT818 V2: manufacturer-sourced facts
SpecificationDocumented value
Analog ports8 RJ11 FXS ports; eight jacks are not eight profiles, registrations or simultaneous calls Source ↗
SIP profiles2 SIP profiles assignable across eight FXS ports; preserve every port-to-profile mapping Source ↗
Network topologyTwo 10/100/1000 Ethernet ports with integrated NAT-router behavior; topology and measured throughput remain deployment evidence Source ↗
Line-test boundaryGR-909 line-test functions are documented; a test result is not a substitute for a completed call or fax Source ↗
Fax capabilityT.38 is listed for Fax-over-IP; negotiated mode and delivered pages require separate proof Source ↗
ProvisioningTR-069 and automated provisioning are listed; ownership, fetch, apply and effective state remain separate Source ↗
Firmware binaryFirmware 1.0.15.3 names ht81xv2fw.bin for HT812 V2, HT814 V2 and HT818 V2 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 HT818 V2 identity before treating it as an HT818

Record HT818 V2 from the label and status page, plus part, hardware, serial or MAC and every software component version. Original HT818 and HT818 V2 share an eight-port role but are not interchangeable firmware or configuration targets. Exact V2 identity precedes any image, template or recovery action.

Current documentation and release notes do not establish installed state, local inventory, provider approval or support entitlement.

Map eight FXS ports onto two SIP profiles

HT818 V2 provides eight FXS ports and two SIP profiles. A physical port, selected profile, SIP User ID, Authenticate ID, registration and hunting membership remain distinct. A hunting group can alter outbound use of an active account, so a completed call from a member is not proof of independent registration.

Maintain an eight-row port table with attached device, profile, redacted identity, inbound policy, outbound policy and observed registration before making bulk changes.

Document the dual-port routed topology

HT818 V2 includes two Gigabit Ethernet ports and integrated NAT-router behavior. Record NET1 and NET2 roles, operating mode, cabling, address, gateway, DNS, time, upstream NAT, VLAN handling and any forwarding. Interface speed, router capability and application throughput are different measurements.

Do not copy HT802 V2’s single-interface assumptions into this topology or add a second routing boundary without a documented design.

Use port status and GR-909 as bounded evidence

The status page and eight phone LEDs expose port states, and the administration guide documents GR-909 line testing. Preserve the port, test, timestamp, result and connected device conditions. A pass or fail remains line-test evidence; it does not by itself prove ringing, caller ID, DTMF, registration, two-way media or fax delivery.

Compare one controlled port at a time so a device, cable, profile or gateway-port fault can be distinguished.

Keep the HT81x V2 image family explicit

Release 1.0.15.3 assigns ht81xv2fw.bin to HT812 V2, HT814 V2 and HT818 V2. It does not authorize original-HT818 firmware or the ht80xv2fw.bin used by HT801 V2 and HT802 V2. Preserve the exact model, current components, source, image name, release-record checksum, configuration and recovery path.

After an authorized update, confirm effective versions, all eight mappings, registrations and analog workflows rather than treating a reboot as completion.

Pilot density, hunting, calls and fax separately

Eight FXS ports concentrate the effect of power, network, template and PBX failures. Test cold boot, routed topology, provisioning, each port/profile assignment, intended hunting, inbound ring, outbound identity, DTMF, caller ID, two-way audio, restart and any required T.38 or G.711 fax path.

Respect the unsupported downgrade edge from 1.0.9.3 or later to 1.0.7.5 or earlier. No gateway, analog device, line test, network, account, call, fax or firmware change was tested for this reference.

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 HT802 V2 and HT818 V2 product pages and datasheets, current HT80x V2 and HT81x V2 administration and user guides, and firmware 1.0.15.3 release notes dated September 17, 2026 were reviewed October 24, 2026. Exact V2 model, hardware, component versions, firmware binary family, network topology, FXS port, profile, identity, registration, hunting role, analog behavior, signaling, media, fax mode, provisioning state and accepted service remain separate evidence. Published firmware and management capabilities do not prove the installed build, provider approval, successful change, compatibility, capacity or availability. No adapter, analog device, cable, line condition, network, VLAN, router, account, PBX, packet, call, fax, image, checksum, price, inventory, support entitlement or vendor response was inspected or tested

Grandstream HT802 V2 or HT818 V2 has missing ports, wrong network mode or failed firmware

Find the first mismatch in exact V2 identity, expected port count, single-interface versus routed topology, profile mapping, provisioning or firmware binary family.

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Device reference · Grandstream exact-model HT802 V2 and HT818 V2 product pages and datasheets, current HT80x V2 and HT81x V2 administration and user guides, and firmware 1.0.15.3 release notes dated September 17, 2026 were reviewed October 24, 2026. Exact V2 model, hardware, component versions, firmware binary family, network topology, FXS port, profile, identity, registration, hunting role, analog behavior, signaling, media, fax mode, provisioning state and accepted service remain separate evidence. Published firmware and management capabilities do not prove the installed build, provider approval, successful change, compatibility, capacity or availability. No adapter, analog device, cable, line condition, network, VLAN, router, account, PBX, packet, call, fax, image, checksum, price, inventory, support entitlement or vendor response was inspected or tested

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Keep two analog ports and profiles separate from the single 10/100 network interface, effective provisioning, registration, media and the HT80x V2 firmware image.

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