IP Telephony & SIP Communication Systems · Guangzhou, China
Scenarios · residential entry
A block of flats asks the same intercom question at every door: who is there, and should they come in. The design on this page puts the entrance station, the indoor unit, the guard position and the lift on one SIP network, with each flat addressed as an extension and no proprietary server in the building. It is counted by entrances and by flats rather than by floor area, and it keeps both cable routes open — new network cable where the walls are open, and the existing two-core riser where they are not. NEXVIA designs, manufactures, supplies and commissions the system; the terminals are manufactured by NEXVIA, including the intercom range used throughout this design.
Count entrances first and flats second. A typical block runs 1 main entrance, 1 to 3 secondary doors (garage, service door, lift lobby), 1 concierge position where the building has one, and one indoor unit per flat — so a 60-flat block with 3 entrances is 3 entrance stations, 60 indoor units and 1 guard station, all on one PBX publishing 24 to 1000 SIP trunks across five models.
The terminals are the published ones. The i67 answers with six access methods on a 7-inch touchscreen and two 2 MP wide-angle cameras; the compact i60 and i60K take IC card, PIN (i60K), BLE unlocking, DTMF and app entry behind an IP65 rain cover; and the A10W fits a standard 86 box with 3 function keys and one relay for the door strike. Door phones are stated as compatible with SIP and ONVIF, so an entrance call can ring the flat, the guard desk or a call group.
Wiring decides the method rather than the model. Where only two-core cable exists in the riser, the PN1 converter carries network and power over the existing pair and reaches up to 1600 m for the network function without power, supplied at AC 100–240 V; a floor with several points uses the PN8 (up to 8 devices) or PN24 (up to 24 devices), both rated to a maximum connection distance of 300 m for network plus power. Prices are not published on this site — every block is quoted per entrance count, flat count and cable survey.
Blocks have a main gate, a garage entrance, a service door and sometimes a lift lobby. Each station is an independent SIP terminal, so each needs its own extension, its own cable route and a place in the guard or resident call group — and the second gate is usually added after the plan is drawn.
A 1980s riser holds two-core cable, not data cable. The documented answer is the PN1 converter, which puts network and power onto the existing pair, with the PN8 or PN24 carrying 8 or 24 devices per distribution point at up to 300 m for network plus power. Measure first; do not assume.
If a flat cannot answer the door, the visitor is stranded. The design widens the chain instead: the guard station, the app, and a ring group that includes several family extensions. Six access methods on the face-recognition range mean regular visitors never need to ring at all.
Holiday lets, second homes and long absences make a single indoor unit unreliable. A call group that includes the guard desk or a nominated neighbour, plus app answering where the cloud layer is used, is what keeps deliveries and family visits working when nobody is on the premises.
| Size band | System | Devices | Notes |
|---|---|---|---|
| Up to 8 flats — villa, mews or converted house | OM20G — 24 SIP trunks; 4 analog ports if a gate line is kept | 1–2 entrance stations (A10W / i60K), up to 8 indoor units (i501), 1–2 flat handsets (H2U) | The desktop chassis covers a small riser. The OM20G is also the only model in the range that can dial out through a 3G/4G USB modem, which matters at a remote gate with no wired line. |
| 9–60 flats — low-rise block or small development | OM50G — 62 SIP trunks; up to 12 analog ports across 3 interface cards | 2–4 entrance stations (i67 / A12V / A10W), 1 guard station (A308), 9–60 indoor units (i501 / i506W) | Ring groups hold up to 40 extensions on this model, so the entrance call group is planned per entrance rather than per building. A maximum number of indoor stations per system is not stated in the materials. |
| 61–200 flats — mid-rise block or gated community | OM200G — 496 SIP trunks; up to 96 analog ports on 24-line interface cards | 4–8 entrance stations, 1–2 guard stations, 61–200 indoor units, 1 lift controller (EC20), community broadcast zones | 4 hot-swap card slots, gigabit Ethernet and single or dual AC/DC power; PT2400 or PT4800 patch panels suit a communal equipment room that cannot go offline. |
| 200+ flats or a multi-phase estate | OM1000-UC — 1000 SIP trunks, up to 200 concurrent calls per trunk | Per-building station counts repeated across phases on one dial plan, with entrance extensions numbered per building | SIP only, with dual hot standby (3 fixed IP addresses) and multi-site networking using unique or repeatable extension numbering. The residential material states the system needs no proprietary servers. |
| Retrofit over an existing two-core riser | OM50G or OM200G — 62 or 496 SIP trunks | Entrance stations and indoor units at the existing points, with PN1 converters per point and PN8 or PN24 switches per riser | PN1 carries network and power over 2-wire with an external AC 100–240 V supply; PN8 and PN24 carry 8 and 24 devices at a maximum connection distance of 300 m for network plus power. Confirm the pair count and continuity at survey. |
| Model | Where it goes | Access, audio and camera | Protection and connection |
|---|---|---|---|
| i67 | Main entrance | Face, IC/ID card, PIN, QR code, DTMF and app on a 7-inch touchscreen; two 2 MP wide-angle cameras with automatic fill light; 3W speaker with AEC; line-out for an induction loop antenna | IP66 and IK07, −20 °C to 60 °C; SIP and ONVIF; Wiegand; anti-spoofing liveness detection for images, videos and masks |
| i68 | Main entrance, larger screen | The same six access methods; two 2 MP cameras with fill light; 8-inch screen; 3W speaker with AEC; line-out for an induction loop antenna | IP66 and IK07, −20 °C to 55 °C; SIP and ONVIF; Wiegand |
| i60 / i60K | Second gate, garage door, column | IC card, PIN (i60K), BLE unlocking, DTMF and app; 2 MP camera with IR night vision; 1W speaker with AEC; 1 relay, 1 short-circuit in and 1 out | IP65 with the rain cover; 12 V DC or PoE |
| A10W | Service door or flat door | 3 function keys; 2W speaker with echo cancellation; one-click call rings the host plus the call-group extensions; supports KT10/KT20/KT30 buttons | Standard 86 box; PoE or 12 V DC; IP54; −10 °C to 50 °C |
| A12V | Vehicle gate and weather | 4 MP camera with IR night vision; 10W speaker with AEC; 2 short-circuit inputs and 2 outputs; anti-tamper alarm reported to the control centre | IP66 and IK10, −40 °C to 70 °C; ONVIF and RTSP on the video model |
| i501 / i506W | Inside the flat | i501: 3 DSS keys, one-touch unlocking or calling, 1W speaker with AEC. i506W: 10.1-inch 1280×800 screen, 2W speaker with AEC, 8 alarm inputs and 1 embedded relay | Wall mounted with PoE integrated; built-in 2.4G/5G Wi-Fi on both; one-touch family call and multi-party full-duplex voice |
| A308 / A320 | Concierge or guard desk | A308: 7-inch 1024×600 screen with a 5 MP adjustable camera. A320: 10.1-inch 1280×800 with an 8 MP camera and privacy cover; integrates IP cameras for monitoring | SIP; gigabit adaptive port; desk or wall bracket; push notifications to the resident unit or app |
| EC20 | Lift machine room or garage | 64 outputs expandable to 128; calls the lift to the first floor ahead of arrival and restricts visitors to designated floors | 10/100 Mbps Ethernet; RS485 and Wiegand 26/34; configured over web software; works with the door phones over HTTP commands |
| PN1 | Riser, or a single point on old cable | Carries network and power over an existing two-core cable | Up to 1600 m for the network function without power; external supply AC 100–240 V |
| PN8 / PN24 | Floor distribution on old cable | A 2-wire switch for up to 8 (PN8) or up to 24 (PN24) two-wire devices | Maximum connection distance 300 m for network plus power; built-in power supply AC 100–240 V; PN24 is a standard 1U chassis |
| Requirement | Conventional apartment entry system | This IP design | What changes operationally |
|---|---|---|---|
| Riser wiring | Multi-core cable from the panel to a handset in every flat | One network run to the entrance station; indoor units are network terminals; where only two-core cable exists, PN1 carries network and power over it | An old riser can be reused rather than replaced |
| Adding a flat or an entrance | A new handset position and a new cable pair back to the panel | A SIP extension and a place in the call group; entrance stations are separate extensions | A new door or a partition is a configuration change |
| Who answers | The flat handset, and if nobody answers the visitor waits | Indoor unit, guard station or app; the call is an ordinary SIP call, so it can also ring a call group | A missed call is not a lost visitor |
| Identity check | Voice only | Video on the entrance station and on the indoor screen; face recognition with anti-spoofing liveness detection on the i67 and i68 | The resident sees who is at the door before releasing it |
| Lift and shared areas | A separate lift controller, wired separately | EC20 on the same system: 64 to 128 outputs over RS485 and Wiegand 26/34, rights assigned per card or resident | Visitor access is restricted to designated floors from one system |
| Alarms in the flat | Not connected to the intercom | 8 alarm inputs and 1 embedded relay on the indoor unit accept an external fire or gas alarm | The intercom position doubles as an alarm input point |
| Records | None | Door logs, temporary keys and push notifications where the cloud layer is used; TF card image storage up to 128 GB on the door phones | Access can be reviewed after an incident |
| Media protection | Not stated for the wiring | TLS and SRTP encryption are stated for voice and video transmission across the residential range | The intercom media on the building network is protected as stated |
| Area | Device | Note |
|---|---|---|
| Main entrance | i67 face-recognition door phone | All-aluminium IP66 and IK07 body with a 7-inch touchscreen, two 2 MP wide-angle cameras with automatic fill light, six access methods, SIP and ONVIF, a Wiegand interface and anti-spoofing liveness detection. The i68 is the larger-screen sibling. |
| Vehicle gate or garage | A12V outdoor video intercom | IP66 and IK10 from −40 °C to 70 °C with a 4 MP camera and infrared night vision, a 10W speaker with echo cancellation, 2 short-circuit inputs and 2 outputs, and an anti-tamper alarm reported to the control centre. |
| Service door, goods entrance or flat door | A10W SIP mini intercom | Fits a standard 86 box with 3 function keys, a 2W speaker with echo cancellation, one relay for the strike and one short-circuit in/out; takes KT10/KT20/KT30 buttons and runs on PoE or 12 V DC. |
| Inside the flat | i506W or i501 indoor station | i506W: 10.1-inch 1280×800 screen, 8 alarm inputs and 1 embedded relay, wall-mounted with PoE and 2.4G/5G Wi-Fi. i501: 3 DSS keys, one-touch unlocking or calling, a 1W speaker with AEC and PoE support. |
| Concierge or guard desk | A308 guard station (A320 for a larger desk) | A308: 7-inch Android touchscreen with a 5 MP adjustable camera and a bracket for desk or wall. A320: 10.1-inch 1280×800 with an 8 MP camera and privacy cover; both answer entrance calls, open doors and integrate IP cameras. |
| Lift machine room or garage | EC20 elevator access controller | RS485 and Wiegand 26/34, 64 outputs expandable to 128, configured over web software; calls the lift to the first floor ahead of arrival and restricts visitors to designated floors. |
| Riser or floor distribution on old cable | PN1 converter, PN8 or PN24 2-wire switch | PN1 carries network and power over an existing two-core cable, up to 1600 m for the network function without power. PN8 carries up to 8 devices and PN24 up to 24, at a maximum connection distance of 300 m for network plus power. |
One per door that a visitor can arrive at. The count is physical, not technical: a main entrance, a garage or vehicle gate, a service door and sometimes a lift lobby — 2 to 4 stations in a typical block, each with its own extension on the PBX.
Yes, and that is the labelled retrofit case in the residential material. The PN1 2-wire converter carries network and power over an existing two-core cable, with up to 1600 m for the network function without power, supplied at AC 100–240 V.
Three published routes. The station can carry a numeric keypad with a code or directory, a regular visitor can be recognised by face or carry a card, and a concierge or resident can route the call from the guard station or the app.
The call follows the same rules as any other call on the PBX. It can ring a group rather than a single device, and if it is not answered it can be routed on — to the guard station, to another family extension, or to voicemail where that extension has it.
Indoor units are wall mounted with PoE integrated, and the A10W panel accepts PoE or 12 V DC. Door-phone power is confirmed per model on the quotation, because that is where the materials state it — the compact i60 series states 12 V DC or PoE.
With the EC20 IP elevator access controller: 64 outputs expandable to 128, RS485 and Wiegand 26/34, configured over web software. It can call the lift to the first floor ahead of arrival and restrict visitors to designated floors.
Which route fits which building
| Building condition | Route | Published limit to check |
|---|---|---|
| Walls open, new cable possible | Network run to each station and indoor unit, PoE where the model publishes it | PoE integrated on indoor stations; 12 V DC or PoE on the compact door models |
| Two-core riser, pairs still sound | PN1 converter per point: network and power over the existing pair | Up to 1600 m for the network function without power; external supply AC 100–240 V |
| Several points on one floor | PN8 or PN24 2-wire switch at the floor distribution point | Up to 8 or 24 devices; 300 m for network plus power; PN24 is a 1U chassis |
| No cable at all to a point | 433 MHz wireless buttons (KT10, KT20, KT30) on a supported indoor unit | Working range 6–25 m indoors; count walls rather than metres on a plan |
| Pairs still on a frame | Terminate on the PBX as analog extensions instead | Up to 12 analog ports on the OM50G and up to 96 on the OM200G, ordered as FXS, FXO or a mix |
Measure the riser at survey and choose the route point by point. A mixed building — PN1 on two floors and new cable on the rest — is the normal outcome, not a compromise.
A door entry system releases a lock, and a lock release has to be legal. Whether a strike fails open or closed, whether an internal release button is required, and how the entry system coexists with a fire panel and an escape route are code matters decided locally, often by more than one authority. The published material records no certification for these products. Confirm the release arrangement with the building fire and access adviser before the strike is specified, and keep the entry system electrically separate from any life-safety circuit.
The retrofit route depends on the cable actually in the wall, so the pair count, continuity and insulation of every reused pair are design inputs. Access-control interfaces use named standards — RS485 and Wiegand 26/34 on the EC20 and a Wiegand interface on the face-recognition door phones — and signal cabling should be kept separate from power where the local rules require it. Earth the equipment room, label both ends of every control pair, and keep the as-built drawing with the flat-by-flat extension list.
Face templates, door logs, temporary keys and camera images are personal data in most jurisdictions. What may be recorded, how long images and logs may be kept, what residents and visitors are told, and who may export a door log are decisions for the building owner and the applicable privacy law — they are not answered by the equipment. A compliant design says what is collected, why, for how long, and who can see it, and it writes that into the building policy before the cameras are switched on.
The published material behind this page records no third-party safety certification for these products, and this page makes no certification claim. Accessibility provisions such as the i67 and i68 line-out for an induction loop, permitted mounting heights for entry panels, PoE classes and cabling colour rules all vary by country. A compliant apartment intercom design is one the building own engineer and compliance adviser have checked against the local code and the building fire strategy — treat this page as the technical input to that review, not as its conclusion.
We have not published a named reference project on this page. The site does not carry customer names or installation records until the client confirms in writing which projects may be made public.
Page author: NEXVIA EngineeringPublished:Last updated:
Covers: apartment intercom · door entry systems for flats · apartment entry system · apartment building entry systems · entry systems for apartments
All IP telephony, intercom and paging equipment in this design is supplied and integrated by NEXVIA.
Running an existing platform
Replacing an older system
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Send us the site type, the number of extensions or rooms and the areas to cover — we will come back with a configuration and quotation.
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