SIP door station call button

New mechanic plate with LED

Some changes have been made on the mechanical part of NovoSIP SIP video intercom.

The button is now equipped with LED for night signaling and the word Appel (CALL in French) has been deleted. Indeed, we run into the problem of engraving in each language and it seemed more logical to remove the marking of the fact that the button is illuminated sufficiently explicit.

Each customer can if he wants to order optional aluminum tag engraved with the word of choice.

In addition, we also have pre-drilled holes for an additional 3 to add more call buttons, which allows up to 4 call buttons in total.

SIP - 4 directionsFor those wanting more SIP call directions, please visit the website which is presented Oyoma scrolling device names that allows up to 500 directions. It also offers access control by code, RFID Mifare with or without Vigik, managed by HTTP server mode inside the Raspberry Pi that equip the doorphone.


NovoSIP test on Acer Iconia tablet

Yesterday we tested the Acer Iconia tablet with 8-inch that has a stereo sound. The quality is very good despite a very affordable price.

Combined with a table stand or wall mount, it is an interesting solution to associate with our SIP client for Android.

Many customers have installed their side our porters with SIP phones, SIP accounts to traditional and mobile phones, PCs, MACs etc …

The combinations are many and the field does not stop evolving.

Description: Acer Iconia Tab Tablet 8 White B1-810-111A

Touch screen tablet with 8 “IPS (1280 x 800) – Intel® Atom ™ quad-core Z3735G – 1GB Memory – 32GB storage – WiFi – Bluetooth – microSD card slot up to 64GB – 1x Micro USB 2.0 – webcam 640×480 front – back Wabcam 2592×1944 – 4600 mAh Battery – Android 4.4 KitKat – 1 year warranty

Brand ACER
Product name ACER Tablet Iconia Tab 8 White B1-810-111A
Category Touch pad
Product type Tablet
Operating System Android 4.4 (KitKat)
Processor Intel Atom Z3735G
Clock frequency 1.83 GHz
Number of cores Quad core
64 bits technology Yes
Resolution 1280 x 800
Display Multi-pads
Characteristics Reflet, CineCrystal, multi-pads 10 points, visualisation angle (WVA)
Type 8″ IPS TFT – retrolight by LEDs
Front camera 0,3 megapixel
Rear camera 5 mégapixel
HD video 1080p
Still Image Resolutions 640 x 480, 2592 x 1944
Storage 32 Go Embedded MultiMediaCard
Flash Memory Cards Supported microSD, microSDHC
Maximum capacity management 64 Go
Audio Microphon , stereo speakers
Graphics Intel HD Graphics
Wireless 802.11b-g-n, Bluetooth 4.0
Capacity 4420 mAh
Technology Lithium-polymer
Voltage required CA 120-230 V ( 50-60 Hz )
Dimensions AND WEIGHT
weight 340 g
Width 13.025 cm
Height 21.53 cm
Depth 0.85 cm
Characteristics Volume control
Sensors Sensor G
Localisation West Europe
Color White
Compliant RoHS, WEEE
Extension AND connectivitY
Interfaces 1 x Micro-USB
1 x mini headset connection cable(3,5 mm)
Expansion Slots 1 x microSD
USB Host Yes
coded keypad on sip video doorphone

Option clavier sur le portier NovoSIP

La version collective disposant d’un clavier codé pour contrôle d’accès (et également d’un lecteur RFID), nous avons voulu apporter une option clavier pour le modèle à appel bouton.

Les contraintes d’encombrement étant importantes nous avons choisi un clavier inox de 4 touches numérotées de 1 à 4.

Les codes peuvent être composés de 3 à 8 chiffres selont le niveau de sécurité recherché.

Dans la version collective, il peut y avoir jusqu’à 500 utilisateurs (ou résidents) et chacun peut avoir un code d’accès lui correspondant. Ci-dessous quelques photos écrans des paramétrages.

access control keypad En 0 on choisi l’onglet Users, en 1 le code, en 2 le nombre de digits de 3 à 8 et en 3 la sauvegarde des paramètres.

Le prix de l’option n’est pas encore fixé (sortie cet automne) mais sera aux alentour des 100 euros.

Nous vous invitons à faire part de vos remarques sur l’intérêt d’une telle option qui a été suggérée par des parents souhaitant permettre un accès à leur enfant sans qu’ils aient besoin de s’équiper de badge RFID (option disponible sur la version collective) ou de Smatphone (option contrôle d’accès Bluetooth à venir également en Automne).

SIP call

Reaction time on a SIP call

People often ask us the question of the reaction time after pressing the call button of the video door station NovoSIP and it seemed that the best response was to illustrate it with a small video.

The NovoSIP is connected to the router by Ethernet cable supplied with PoE, while the Android tablet (note the associated keyboard looks like a PC but it is an Android tablet, ASUS brand for those interested) is Wifi connected to the house.

The video does not show the conversation (we have other video to illustrate the quality of sound and picture) but only responsiveness to the call by viewing the two devices in a single view, because in case of door station in the same room as the tablet, there’s larsen feedback.

This video illustrates that an almost immediate communication over a home network of the most common.


LED night light

All the video door stations do not need lighting at night since there is often mood lighting but in some cases it is an interesting option.

To avoid having to enlarge the camera hole by adding the usual 6 LEDs doorphone, making it more likely to draw attacks. we chose to use a single high power LED as used in the new flashlights.

The result is very convincing. Separating the LED camera also prevents glare on the glass cover. The quality of the Raspberry Pi camera  also contributing to the output assembly. The LED lights up when making a call and switches off when opening the door.

SIP door station setup

Debug mode on NovoSIP web interface

In normal operation, our NovoSIP doorphone ensures quality communication without delay between pressing the call button with great image quality provided by the camera of the Raspberry Pi.

Computer networks can be complex and may induce undesirable behaviors such as important reaction times, video or audio stream of poor quality etc …
For this reason we integrated an option box to generate a log file containing the network behavior data.

For those interested, following a discussion between a client and our support for the analysis and resolution of unusual behavior:

Elements Here are some statistics on flows received by the PC:


Max delta = 2039.48 ms packet at no. 4726
Max Jitter = 1.21 ms. Mean = 0.54 ms jitter.
Max skew = -10.39 ms.
Total RTP packets = 162 (expected 162) Lost RTP packets = 15 (9.26%) Sequence errors = 13
Duration 32.64 s (-22 323 ms clock drift, Corresponding to 28450 Hz (-68.39%)

10% loss on the video stream: this means in reality of very large losses (30%, 50% view, images can be reconstructed by the SIP application).


Max delta = 79.87 ms packet at no. 4330
Max Jitter = 3.02 ms. Mean = 0.33 ms jitter.
Max skew = -20.26 ms.
Total RTP packets = 1770 (expected in 1770) Lost RTP packets = 128 (7.23%) Sequence errors = 120
Duration 35.38 s (-6754 ms clock drift, Corresponding to 6473 Hz (-19.09%)

We see also more than 7% of packets lost. what is more alarming is the “drift”: time elapsed 20% slower than expected …

My first impression is that the network is saturated.

With “Voip by Antisip PC” so you have to configure the video card to use “static picture” to minimize bandwidth video to avoid overloading the network with a non-required flow.

If such a gap exists is perhaps the CPU was running full speed. If there are too many losses networks, it is possible that the system tries to compensate with the PLC. The PLC being “overused”, the doorman did not have time and capture is no longer continuous (more real-time) this can lead to this situation or system only produces 80% of its time. Added to this, the loss of 10%, and the end is missing 30% of the audio …


1 / I think we should look by logging onto the doorman if that is the case

 -> Check CPU usage 100%? during calls.

2 / Use only “static picture” for Voip By Antisip PC. (Minimize the network impact and the impact on the CPU board.) This should already improve.

 -> Check CPU usage 100%? during calls.

3 / Thirdly, try to solve the problem of network loss.

 -> Check CPU usage 100%? during calls.

SIP video door Station

SIP video door entry at Caen High Technology Campus in France

The reason for this article is that the facility in question is interesting for several reasons:

  • It includes 3 door entry stations with video camera (that of the Raspberry Pi), graphic TFT screen displaying names and stainless steel keyboard to scroll through and call the chosen name.
  • Operating on a building including 3 accesses to the same area: the 3 door stations call for the same residents.
  • Operation LAN without the need to pass via the Internet (the installer comes as future residents do not have access to the premises). Safety is more ideal in this case.
  • SIP clients are installed on Android tablets in each room.
tablet holder

Wall mount holder for tablet

Wall mount holder for tablet

We finally found easy mounting to install and affordable to set the home automation tablet to the wall of the apartment. This well-designed support, can guide the tablet so that it can be accessible to all family members who want to use it. We can discover in the online store site NovoSIP ( at a price of 15 Euros before tax which is reasonable for this type of product.

support mural pour tablette

It’s only missing the tablet and a small electronic board that we are developing to provide PoE power to the tablet. We are currently testing this purpose an Android tablet 4.4 format 10 inches with a RJ-45 Ethernet connection is supplying by a 9-volt jack connector.

The most critical factor is the audio quality for SIP video entry application. If the results are fine, we offer this tablet soon associated with PoE option and a “magnetic loop” for the hearing impaired

IP video door bell

Video doorbell “peer to peer” to open to visitors from your iPhone or Android Smartphone

In the same time our video entry SIP developments “high end” based on the Raspberry Pi, we realized that it would be a shame to miss the needs of customers looking for a small, simple and cheap device devoid benefits evolutions of the Raspberry but doing the job.

We have begun testing a small very promising video door station since for a very low price, it enables communication with your Android smartphone or iPhone.

Unlike other similar products good manufacturing Asian markets we found some advantages to this product:

  • managing an electric strike the choice of using WiFi or Ethernet connection
  • Possible connection in local mode without being dependent on an external server
  • Audio and video quality correct
  • Video surveillance and alarm options (we have not had the time to explore)

Disadvantage at this stage of our tests: no connection to the exit button (fortunately we have a timed relay board for that)

IP video doorphone