Aiphone NI-JA vs Aiphone IX-NVP2: Specification Comparison
Both the Aiphone NI-JA and the Aiphone IX-NVP2 are flush- or surface-mountable audio door stations designed for commercial entry-point intercom duty — the same product class a buyer would evaluate side by side. The NI-JA is a hardwired analog station targeting Aiphone NI-series master systems, while the IX-NVP2 is a PoE-powered, SIP-compatible IP station on the Aiphone IX platform. The comparison covers connectivity and protocol stack, physical installation and environmental resilience, and platform compatibility — the three axes that drive purchasing decisions in this category.
In This Guide
- How do the NI-JA and IX-NVP2 differ in connectivity and protocol support?
- Which station offers stronger environmental and physical protection for outdoor deployment?
- What master-station or platform ecosystems does each door station require?
- Which should you choose: the NI-JA or the IX-NVP2?
- Side-by-Side Specs
- FAQ
How do the NI-JA and IX-NVP2 differ in connectivity and protocol support?
The NI-JA is a purely analog, hardwired station. It runs on 3-conductor shielded cable (18 AWG, Aiphone #821803) with a maximum communication distance of 650 feet and delivers hands-free, full-duplex two-way audio. No IP address, no network switch, no codec selection is required or available — the system is self-contained on wire.
The IX-NVP2 operates entirely over IP via Cat-5e/6 and draws its power from the same cable through 802.3af PoE (3.36 W). It supports audio codecs G.711 and G.722 and communicates over a broad protocol stack: IPv4, IPv6, TCP, UDP, SIP, HTTP, HTTPS, RTSP, RTP, RTCP, IGMP, MLD, SMTP, FTP, DHCP, NTP, and DNS. SIP compatibility means it can register to third-party SIP call managers beyond the Aiphone IX platform. The NI-JA has no equivalent IP or SIP capability per the provided specs.
Which station offers stronger environmental and physical protection for outdoor deployment?
The NI-JA is specified as weather- and vandal-resistant with a 300-series stainless steel body and a 2-gang form factor. No formal ingress-protection rating (IP65 or equivalent) is stated in the provided specs, and no operating temperature range is listed.
The IX-NVP2 carries a published IP65 rating — dust-tight and protected against low-pressure water jets — and an operating temperature range of -40 °F to 140 °F (-40 °C to 60 °C). Its 3-gang stainless steel body accommodates two call buttons. Both stations list flush or surface mounting, so installation flexibility is equivalent. Where the NI-JA relies on material-based weather resistance without a certified IP rating, the IX-NVP2 provides a testable, auditable environmental standard, which matters for warranty claims and specification-compliance on projects.
What master-station or platform ecosystems does each door station require?
The NI-JA is explicitly compatible with Aiphone NIM-20B and NIM-40B master stations only, per the provided specs. It is a dedicated component within the Aiphone NI analog series; wiring to any other master or system is not supported by the specifications provided.
The IX-NVP2 is part of the Aiphone IX IP platform and adds SIP compatibility, meaning it can also register to standards-based SIP call servers from other manufacturers. It carries one contact output for door-release or auxiliary-device control. The IX-NVP2 also offers a two-button configuration (two call buttons), allowing it to serve two separate tenants or entry zones from a single station — a feature with no analog equivalent in the NI-JA specification. No maximum call distance is listed for the IX-NVP2, as range is governed by the IP network rather than cable run length.
Which should you choose: the NI-JA or the IX-NVP2?
Our take: The NI-JA is the stronger choice when the project is a straightforward analog NI-series deployment with existing wiring infrastructure and no IP network at the door, especially where the 650-foot cable run and a single-button, single-master topology meet all requirements. The IX-NVP2 is the stronger choice in every other scenario: it carries a verified IP65 ingress rating and an operating range of -40 °F to 140 °F versus no rated equivalents on the NI-JA; it supports two call buttons versus one station-wide audio port; and its SIP protocol stack plus 14-protocol network support allow integration with IP call managers, access control systems, and multi-site platforms that the NI-JA cannot address. Buyers replacing or extending an existing Aiphone NI analog system should stay with the NI-JA. Any new installation, multi-tenant entry, or IP-infrastructure project should specify the IX-NVP2.
Side-by-Side Comparison
Spec-for-spec, from manufacturer data.
| Specification | Aiphone NI-JA | Aiphone IX-NVP2 |
|---|---|---|
| Product Class | Analog Audio Door Station | IP Audio Door Station |
| Call Buttons | — | 2 |
| Form Factor / Gang Size | 2-gang | 3-gang |
| Connectivity | 3-conductor shielded wire (18 AWG) | Cat-5e/6 (IP network) |
| Power Source | — | 802.3af PoE |
| Power Draw | — | 3.36 W |
| Audio | Hands-free two-way | G.711, G.722 (SIP) |
| SIP Compatible | No | Yes |
| Protocol Stack | — | IPv4, IPv6, SIP, HTTP/S, RTSP, RTP, RTCP, IGMP, MLD, SMTP, FTP, DHCP, NTP, DNS |
| Contact Output | — | 1 |
| Max Cable Run | 650 ft | Network-dependent (not specified) |
| Ingress Protection | — (weather/vandal-resistant, no IP rating stated) | IP65 |
| Operating Temperature | — | -40 to 140 °F (-40 to 60 °C) |
| Mounting Options | Flush (2-gang box) or surface (SBX-2G/A) | Flush or surface |
| Material | Stainless steel (300-series) | Stainless steel (grade not specified) |
| Compatible Platform | Aiphone NIM-20B, NIM-40B | Aiphone IX series + SIP |
| Warranty | 2-year | — |
Frequently Asked Questions
Which should you choose: the NI-JA or the IX-NVP2?
The NI-JA is the stronger choice when the project is a straightforward analog NI-series deployment with existing wiring infrastructure and no IP network at the door, especially where the 650-foot cable run and a single-button, single-master topology meet all requirements. The IX-NVP2 is the stronger choice in every other scenario: it carries a verified IP65 ingress rating and an operating range of -40 °F to 140 °F versus no rated equivalents on the NI-JA; it supports two call buttons versus one station-wide audio port; and its SIP protocol stack plus 14-protocol network support allow integration with IP call managers, access control systems, and multi-site platforms that the NI-JA cannot address. Buyers replacing or extending an existing Aiphone NI analog system should stay with the NI-JA. Any new installation, multi-tenant entry, or IP-infrastructure project should specify the IX-NVP2.
Can either door station work without a dedicated Aiphone master station?
The NI-JA is specified exclusively for Aiphone NIM-20B and NIM-40B master stations and has no stated compatibility outside that analog ecosystem. The IX-NVP2 supports SIP, so it can register to third-party SIP-compatible call servers or IP PBX systems — making it usable without an Aiphone IX master unit, provided a SIP infrastructure exists.
Is the NI-JA or IX-NVP2 better suited for harsh outdoor environments?
The IX-NVP2 is better documented for harsh outdoor use: it carries an IP65 ingress-protection rating and a tested operating range of -40 °F to 140 °F (-40 °C to 60 °C). The NI-JA is described as weather- and vandal-resistant with stainless steel construction, but no formal IP rating or operating temperature range appears in the provided specifications.
Which station is easier to wire and commission for a small single-door installation?
The NI-JA is simpler to wire for a small analog job: it uses standard 18 AWG shielded 3-conductor cable (Aiphone #821803) run directly to the master station — no network switch, PoE injector, IP addressing, or SIP configuration required. The IX-NVP2 requires a Cat-5e/6 run to a PoE switch or injector and network/SIP provisioning, which adds commissioning steps but also eliminates the dedicated cable type and integrates into an existing IP infrastructure.
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