FR3060926B1 - SYSTEM, ASSEMBLY AND METHOD FOR INTERCOM - Google Patents

Abstract

An intercom system includes a gatekeeper (1) configured to, when a visitor initiates a call, acquiring a first image (19) of the visitor and transmitting it by an image communication module (12) to at least a first device (41, 42, 43) with an identifier corresponding to the called party; said or each of said apparatuses (41, 42, 43) being configured, upon receipt of said image, to allow a user to initiate the transmission of at least one control request to the intercom system. Said at least one control request includes a telephone call control request which includes a telephone number to be called associated with a second device (41) which comprises a GSM standard telephony module. Said intercom system is configured to, upon receipt of said call control request, issue the telephone call by the GSM communication module. The invention also relates to a set and a corresponding method.

Description

FIELD OF THE INVENTION

The present invention generally relates to an intercom system and procedure.

PRIOR ART

Intercom systems are known from the state of the art and comprise a gatekeeper comprising a GSM communication module. The gatekeeper is configured to allow, when a visitor presses a duportier call button, to make a call, by the GSM communication module, destination of a phone of a person associated with said call button.

However, the design of these systems does not give full satisfaction in terms of possibilities of action and flexibility of use, since, in the absence of a response from the called party, for example because the called party is in a meeting and has turns off his phone, the visitor falls on the voicemail. In addition, the called person generally does not have the opportunity to the visitor and the possibilities of actions offered to him are very limited, so that the use of such systems is not comfortable.

The object of the present invention is to propose a system and an intercom procedure making it possible to overcome all or some of the problems set out above.

In particular, the present invention aims to provide an intercom system and method whose use by the called person is comfortable and which allows the visitor and the person called to communicate vocally reliably with a reduced risk of degradation or cut the quality of voice communication, while allowing the caller to identify the visitor.

SUMMARY OF THE INVENTION To this end, the subject of the invention is an intercom system comprising: a gatekeeper which comprises an interface enabling a visitor to trigger the call of a person, and a device for acquiring a call; picture ; and, included in or deported from the gatekeeper: a first communication module, called a communication moduleGSM, able to communicate with a mobile telephone network according to the GSM standard; a second communication module, called an image communication module, capable of communicating with a mobile telephone network according to a standard, for example the GPRS or 3G standard, making it possible to communicate data at a rate higher than that permitted by the GSM standard; the intercom system being configured to, when the visitor initiates a call at said gatekeeper interface, acquire a first duender image by the image acquisition device, and transmit it by said image communication module to at least one a first device; said at least one first device comprising: a communication module, for example a communication module according to the GPRS or 3G standard, for receiving said image, and a computer application executable by said or each of said devices, configured for, when it is executed by said or each said apparatus and on receipt of said image, allow a user to trigger, from said at least one first device, the transmission of at least one control request to the intercom system, said at least one control request including a request for a telephone call that includes a telephone number to be called associated with a second device which comprises a telephone module according to the GSM standard; the intercom system being configured for, upon receipt of said telephone call control request, calling the second apparatus by the GSM communication module.

The system according to the invention thus uses two different networks or communication standards, one for transferring the audio data (GSM network), the other for transmitting image data, and possibly video, according to a so-called network. data (Edge, 3G, 4G ..) suitable for transmitting data packets. Such a conception of the system according to the invention makes it possible to benefit from a reliable voice communication quality made of the reliability of the GSM network, while allowing the visitor to be identified by at least one image and, when the data network allows it, to communicate by video, without affecting the voice communication since it is provided by a separate and reliable network.

Thus, if the data network has a bad bandwidth, the user (that is to say the person called) can receive on his or one of his devices, an image acquired during the support on the element call center interface. Transmission of this "fixed" image consumes little bandwidth, while voice communication is maintained by the GSM network.

In addition, the advantage of triggering the image taken following the support of the visitor on a calling element of the gatekeeper interface, also lies in the fact that, at the time of the support, the visitor is in front of the porter. The visitor has not yet had the time to retreat from the gatekeeper so that the visitor is present on the acquired image, which allows the user to efficiently and quickly identify the visitor who calls him through a simple image , without needing for it a video stream, even if it can require by following the sending of such a video stream.

"Different networks" means modes of communication according to two different protocols (or standards), namely the GSM protocol for voice and an upper rate protocol adapted to the transfer of digital data in particular for sending images. The physical structures for implementing these protocols may include common parts.

In addition, the system according to the invention is flexible in use since the image and the corresponding call notification can be sent to several devices associated with the calling element of the doorkeeper requested by the viewer. Thus, the image acquired and the corresponding call notification (possibly formed by said image) can be sent to several devices of the same person or of a group of people (for example different members of the same household) so that the communication request can be managed on one and / or the other of the devices according to the situation.

Separating the transmission of audio from the transmission of image data and, possibly, video streaming, allows a great flexibility in the management of the image and / or the video stream while maintaining a reliable transmission of audio. Thus, the user can, comfortably, communicate vocally with the user and at least identify the visitor or receive the video if the network allows it. It can be expected that the sending of the video is done indirectly by sending images that follow one after the other if the network is of average or poor quality. In the case of a bad network, the video will be jerky but the person called will be able to see the person in front of the intercom. Such a resolution makes it possible not to undergo a complete transmission cut that could occur in the case of the transmission of a conventional video stream incase of bad bandwidth that would deprive the called person of any image.

According to an advantageous characteristic of the invention, the intercom system comprises: a server making it possible to transmit data, including said image, between said second communication module and said at least one first device, a memory in which is memorized a list of identifiers to each of which is associated with at least one, preferably several, apparatus; and, said image transmission by said second communication module to at least a first device being performed via the server, the intercom system is also configured to transmit to the server an identifier associated with the calling element on which the visitor has pressed, and the server is configured to determine using the list of identifiers, said at least one device associated with the received identifier and transmit the image to said at least one device.

According to an advantageous characteristic of the invention, said intercom system is configured to transmit the image in a so-called weak resolution resolution, then transmit said image in a better resolution or transmit data making it possible to improve the resolution of said image, said executable computer application by said at least one first device being configured to receive and display the low resolution image, and then, when the quality of the communication network to which the first device is connected, to receive the higher resolution image or corresponding data, display said image of better resolution.

According to an advantageous characteristic of the invention, in the absence of receiving a call control request beyond a given duration, the intercom system is configured to control the GSM communication module so as to call a telephone number. default, for example, a landline number. The invention also relates to a communication assembly comprisingan intercom system as described above and said at least one first device.

According to an advantageous characteristic of the invention, when the intercom system receives a call control request from the one or more of said first devices, called active device, to which the image has been transmitted, the intercom system is configured for controlling the GSM communication module so as to call said second apparatus whose number is included in the call control request, while maintaining the communication between the image communication module and said active device.

According to an advantageous characteristic of the invention, said at least one device comprising a plurality of devices, called first devices, the intercom system is configured to transmit, via the image communication module, a call cancellation request. to each of the first devices other than the active device, so that the computer application executed by each of said first devices other than said active device is configured to receive said call cancellation request, no longer display the image and no longer allow the transmission of a call request request to the destination of the intercom system.

According to an advantageous characteristic of the invention, said active device and thesecond device whose number is included in the call control request, are formed by the same device, such as a smartphone.

According to an advantageous characteristic of the invention, said active device is a device devoid of a GSM communication module, such as a tablet or a computer, and provided with a communication module for receiving an image transmitted by the image communication module. of the intercom system. The invention also relates to an intercom method using a set as described above, said method comprising the following steps: said method comprising the following steps: - triggering a call request by a visitor since the duportier interface; - capturing an image of the visitor; - transmission by the image communication module, said duvisiteur image to at least a first device, preferably to a plurality of first devices; - following an action of a user on the one or one of said first devices, transmission to the intercom system from the or one of said first devices, a telephone call control request including a telephone number of a second device to call; - call the second device the GSM communication module.

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the invention will become apparent from the description which follows, which is purely illustrative and nonlimiting and should be read with reference to the accompanying drawings, in which: FIG. 1 is a diagrammatic view of an intercom system according to an embodiment of the invention; FIG. 2 is a schematic view of an intercom system according to an embodiment of the invention, in which the gatekeeper issues a GSM call on a fixed telephone in the absence of response from the other apparatuses; FIG. 3 is a view according to an embodiment of the invention in which the gatekeeper sends a GSM call to a mobile telephone following the call request of the number of this telephone transmitted by this telephone which also receives one or more images or video transmitted by the gatekeeper's image communication module; FIG. 4 is a schematic view of an embodiment according to the invention in which the GSM and 3G modules can be deported from the gatekeeper.

DETAILED DESCRIPTION

The concept of the invention is described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the concept of the invention are shown. In the drawings, the size and relative sizes of the elements may be exaggerated for clarity. Similar numbers refer to similar items in all drawings. However, this concept of the invention can be implemented in many different forms and should not be construed as being limited to the embodiments described herein. Instead, these embodiments are provided so that this description is complete, and communicate the scope of the concept of the invention to those skilled in the art. The scope of the invention is accordingly defined by the appended claims. The embodiments which follow are examined, for the sake of simplicity, in relation to the terminology and the structure of an intercom system.

Reference throughout the specification to "an embodiment" means that a particular feature, structure, or feature described with respect to an embodiment is included in at least one embodiment of the present invention. Thus, the occurrence of the term "in one embodiment" at various locations throughout the specification does not necessarily refer to the same embodiment. In addition, the particular features, structures, or features may be combined in any suitable manner in one or more embodiments.

With reference to the figures and as recalled above, the invention relates to an intercom system which comprises a gatekeeper 1. The gatekeeper comprises an image acquisition device 13 for acquiring an image, a series of images and / or a video stream. The gatekeeper comprises a unit 10 for electronic and computer processing. In the example illustrated in FIGS. 1 to 3, the gatekeeper 1 also comprises a first communication module 11, called a GSM communication module, able to communicate with a mobile telephone network 5 according to the GSM standard, and a second communication module 12, called image communication module, able to communicate with a mobile telephone network 21 according to a standard, for example the standard GPRS or 3G, for communicating data at a rate higher than that allowed by the GSM standard. Said communication modules 11 and 12 are configured to be controlled by the processing unit of the gatekeeper. As illustrated in FIG. 4 and recalled hereinafter, said communication modules 11 and 12 may be deported from the gatekeeper.

The gatekeeper comprises a control interface 16 allowing a visitor to trigger the call of a person. Advantageously, the interface allows the visitor to select a person to call from a list of severalpersons and validate the selection to trigger the call of the person.

The intercom system communicates with a plurality of apparatuses 41, 42, 43 over the Internet. At least one device 41 comprises a telephony module for receiving telephone calls transmitted from the GSM call transmission module 11. The devices each comprise a communication module according to a standard allowing a bit rate higher than that of the GSM so as to allow the reception of data such as image data, transmitted by the duportier image communication module.

The GSM 11 call transmission module of the gatekeeper may be common to all or part with the image transmission module 12.

When a visitor presses a call element 16 of the gatekeeper 1, for example formed by a button or a touch zone, the image sensor 13 of the gatekeeper 1 takes an image 19 and the image transmission module 11 transmitsladite image 19 by a mobile communication network 21 to a server 3 configured to receive said image. Said mobile communication network 21 is a communication network configured to transmit digital data according to a standard, for example GPRS, 3G, 4G (or higher degeneration) allowing a data rate greater than that permitted by the GSM standard.

For simplicity, this communication network 21 for transmitting the image is presented in the example in the figures as a 3G communication network, but of course as explained above, said communication network can operate according to another standard as long as it allows to benefit from a digital data rate higher than the ratepermitted by the GSM communication network.

The transmission of the image between the mobile communication network 21 and the server 3 can be carried out by means of different types of mobile and wired networks forming part of the Internet network, such as an ADSL network, connected to each other. In the example illustrated in the figures, the server 3 thus receives the image via the Internet to which the mobile communication network 21 belongs.

The transmission module 11 also transmits a user identifier associated with this image. The user identifier corresponds to an identification element of the user associated with the call element of the duportier interface on which the visitor has pressed and which allows the server to identify the user and therefore the device or devices of the the user to whom he must transfer the image as explained below. In a particular aspect, the identifier is included in the data frames that contain the image.

The server 3 thus compares the user identifier received with a list of identifiers that it has in memory or to which it can access. The list includes identifiers with which several devices are associated. The server transmetors the image to the devices 41, 42, 43 associated with the identifier of the list that corresponds to the received identifier.

The server 3 is thus configured to determine in the list the identifiers, the identifier of the list which corresponds to the received identifier in order to determine the devices 41, 42, 43 (associated with the determined identifier) to which the transmission must be transmitted. picture.

The image transmission is carried out via one or more communication networks, as explained above, for example by an Internet network, making it possible to communicate with said devices 41, 42, 43.

In particular, as illustrated in FIG. 1, the image is transmitted to several devices 41, 42, 43, preferably mobile devices, such as a telephone and a tablet, configured to receive data packets by a mobile telephone network.

In other words, the image is transmitted to the devices 41, 42, 43 according to a standard for transmitting digital data, also called data, that is to say a GPRS type network, 3G or higher generation. The image can also be transmitted from the server 3 to a device 40, usually called the Internet box, to perform the gateway between the outside internet network to a home and the local network of a home.

Thus, in the example illustrated in FIG. 1, the image is transmitted by the server 3 via an ADSL network to an internet box 40 which forwards it, for example by a WIFI-type wireless communication, to another mobile device, such as a tab.

The server 3 transmits a call notification, associated with said image, to the devices 41, 42, 43 determined. It can be provided that the transmitted image forms said call notification. Advantageously, a setting option makes it possible to send a notification without image in the case where the user does not want to consume data.

Said gatekeeper 1 is configured to transmit the image 19 in a so-called weak resolution, and then transmit said image in a better resolution. Said at least one first device 41, 42, 43 being configured to receive and display the low resolution image, then when the quality of the communication network to which the first device is connected, receive and display the image of better resolution, in place of the image of weak resolution. Instead of sending a second image, it is possible to send a data file whose weight is smaller than the best-resolution image, so that a mathematical function applied to the first image with the data file generates the data file. image of better resolution.

Each apparatus 41, 42, 43 is configured to respond to the said notification by issuing a control request to the gatekeeper 1, possibly via the server 3, to request the gatekeeper to activate and transmit the video and / or activate an actuator command, such as a door open command. For this purpose, each device comprises a processor and a memory that executes a computer application hosted on the device or on a remote server. Laditeapplication is configured to control the communication functions between the device and the gatekeeper, via the server 3. In particular, laditeapplication makes it possible to control the data communication module or modules of the device. The step of answering the call notification received by the device may be performed by touching or selecting the displayed image or by touching or selecting at least one configured zone or button to transmit a command inquiry. Said command request may be a command request for sending higher quality image, or sending video.

Said command request can also be a request for the intercom system to call by the GSM module a telephone number, preferably predefined at the device and / or at the server level.

Each device is thus configured to respond to the notification corresponding to the image received by the transmission of a request to the gatekeeper 1, preferably via the server 3, to request a voice communication. Upon receiving the voice communication request, the GSM call transmission module 11 transmits a call according to the GSM standard by a mobile telephone network to a telephone number included in the voice communication request request.

Advantageously, the telephone number can be a fixed or mobile telephone number. This number is predefined by the user or the user group of the devices and can be stored in the device for sending the voice communication request or in the list of identifiers and devices used by the server 3. Thus at each device may be associated with a telephony number for establishing a voice communication with this device if it is equipped with a suitable telephony module or with another device equipped with a telephony module adapted to receive the call transmitted by the GSM communication module the porter. When one of the devices receiving the image transmits a voice communication request request, the predefined number is then included in the voice communication request request. It can be expected that when answering the call, the user of the device can select the phone number to be included in the device to choose the telephone on which he wishes to establish the voice communication.

The voice type communication is established between the gatekeeper and the fixed telephone via the GSM communication module of the gatekeeper. The visitor can then communicate with the user of the fixed telephone, using the microphone and the loudspeaker's loudspeaker.

Of course, the user identifier may correspond to a person or a group of persons, and the associated devices may be devices belonging to the same person or to different persons.

As illustrated in FIG. 2, in the absence of response from the device (s) 41, 42, 43 beyond a given delay, the GSM 11 call transmission module of the gateway 1 transmits a call according to the GSM standard by the mobile telephone network 5 to a default number preprogrammed and associated with the call element of the interface 16 of the gatekeeper activated by the visitor.

In the example illustrated in the figures, the default number corresponds to that of a fixed telephone 7. The call is initially transmitted by the mobile telephone network GSM 5 but can of course go through different networks before arriving through the switched telephone network RTC 6 or an IP network if the telephone number corresponds to a telephone configured to communicate according to the VOIP protocol.

When the called user picks up the fixed telephone 7, the voice type communication is established between the gatekeeper and the fixed telephone 7 via the gatekeeper's GSM communication module. The visitor can then communicate with the user of the fixed telephone using the microphone 15 and the loudspeaker 14 of the doorphone.

The intercom system is also configured to detect the voice communication socket and to transmit from the transmission module 12 and via the server 3, to each device an erase request of the call notification previously transmitted to each of said devices by the server 3.

FIG. 3 illustrates the case where a user of one of the devices 41, 42, 43which the server 3 has transmitted the image responds to the call notification when the apparatus 41 transmits a command request to the destination duportier 1, through the server 3, to request a voice communication. As explained above, said control request includes a telephone number on which the user wishes to be called.

Upon receipt of the voice communication request, the gatekeeper GSM 11 transmitting module transmits a call according to the GSM standard via a mobile telephone network 5 to the number included in the voice communication request request.

As explained above, the telephone number may be a fixed or mobile telephone number. This number is predefined by the user and can be stored in the device 41 or in the list of identifiers and devices used by the server 3. Thus, each device can be associated with a telephone number to be included, for example by the server 3 or the device, in the voice communication request request.

In the example illustrated in FIG. 3, the said apparatus 41 which responds to call planning and the second apparatus whose number is included in the call control inquiry, are formed by the same apparatus, such as a smart telephone. Alternatively, it can be provided that the apparatus which responds to lanotification is the apparatus 42 which lacks a communication moduleGSM, such as a tablet or a computer. However, the device 42 and munid'un communication module for receiving an image transmitted by the image communication module 12 of the gatekeeper.

If the user of the smart phone 41, picks up the notifications from the devices that received the image as explained above.

The voice type communication is then established between the gatekeeper 1 and the GSM module of the smart phone 41 via the GSM communication module 11 of the gatekeeper. The visitor can then communicate with the user of the smart phone 41, using the microphone and the loudspeaker of the doorkeeper. The called party can talk with the caller over the GSM network while, through 3G mobile phone network, he can ask to receive or stop the video during the call. The called party can furthermore require, by means of the application which runs on the smart phone, the activation of a function of the intercom system, such as a door opening command. For this purpose, a request is transmitted from the telephone 41, via the mobile telephone network, to the 3G communication module of the gatekeeper.

As recalled above, the devices intended to receive the image or images transmitted by the gatekeeper comprise a processor and a computer application executable by said processor. Of course, said devices may include a memory in which is stored laditeapplication and other electronic components to implement the functions described above.

In addition, the processing unit 10 of the gatekeeper can also compriseprocesseur and a computer program for implementing thefunctions described, in particular for controlling the communication modules11 and 12 and control the image and / or video capture.

As illustrated in FIG. 4, it is possible for communication modules 11 and 12 to be deported from gatekeeper 1. In fact, since the gatekeeper is located downstairs in front of the hall of the building, he can be in a GSM shadow zone and 3G. By deporting, preferably with the aid of a communication bus 100, the communication modules 11 and 12, the gatekeeper 1 can be stored in a GSM / 3G shadow zone and the communication modules can be positioned in an area covered by the network. GSM / 3G.

The link 100 between the unit 10 of the gatekeeper and the communication modules can be made using a 2-wire bus, in which pass the power, audio, video and data.

The functions and steps described above can be implemented as a computer program and / or via hardware components (eg, programmable door networks). In particular, the functions and steps operated by the devices, the server, the gatekeeper or the gatekeeper's processing unit, the communication modules of the intercom system, can be carried out by computer instruction sets implemented in a processor or controller or be made by electronic components or FPGA or ASIC components. It is also possible to combine computer parts and electronic parts.

Computer applications or computer programs, or computer instructions, may be contained in program storage devices, such as computer-readable digital data storage media, or executable programs. Programs or instructions can also be run from program storage devices or from a remote server.

Alternatively, it can be provided that the intercom system, particularly the image communication module 12, transmits the image (s) not to a server 3 as described above, but directly to each of said at least one apparatus 41, 42, 43, for example by implementing the functions of said server 3 described above in the intercom system (for example in the processing unit 10 which controls said image communication means 12). The invention is not limited to the embodiments illustrated in the drawings. Accordingly, it should be understood that when the features mentioned in the appended claims are followed by reference signs, these signs are included solely for the purpose of improving the intelligibility of the claims and are in no way limiting to the scope of the claims.

Moreover, the term "including" does not exclude other elements or steps. In addition, features or steps that have been described with reference to one of the embodiments set forth above may also be used in combination with other features or steps of other embodiments set forth above.

Claims (7)

An intercom system comprising: - a gatekeeper (1) which includes an interface (16) for a visitor to trigger a person's call, and an image acquisition device (13); in or out of the gatekeeper (1): - a first communication module (11), called a GSM communication module, able to communicate with a mobile telephone network (5) according to the GSM standard; a second communication module (12), called an image communication module, capable of communicating with a mobile telephone network (21) according to a standard, for example the GPRS or 3G standard, making it possible to communicate data at a rate higher than this is confirmed by the GSM standard; the intercom system being configured for, when the visitor initiates a call at said gatekeeper interface, acquiring a first image (19) of the visitor by the image acquisition device (13), and transmitting it by said image communication (12) to at least a first apparatus (41,42,43); said at least one first device (41, 42, 43) comprising: a communication module, for example a communication module according to the GPRS or 3G standard, for receiving said image, and a computer application executable by said at least one a first apparatus (41, 42, 43), configured to, when executed by said at least first apparatus and upon receipt of said image, enabling a user to trigger, from said at least one first apparatus, the transmission of at least one control request to the intercom system, said at least one control request including a telephone call control request which includes a calling telephone number associated with a second apparatus (41) which comprises a telephony module according to the GSM standard; the intercom system being configured to, upon receipt of said call control request call, call the second device (41) by the GSM communication module (11). 2. Intercom system according to claim 1, characterized in that the intercom system comprises: a server (3) for transmitting data, including said image, between the second communication module (12) and said at least one a first apparatus (41, 42, 43); - a memory in which is stored a list of identifiers to each of which is associated with at least one, preferably more than one, apparatus (41, 42, 43); and in that, said image transmission by said second communication module (12) to at least a first device (41, 42, 43) being made via the server (3), said intercom system is also configured for transmit to the server (3) an identifier associated with the call element on which the visitor has pressed, and said server is configured to determine using the list of identifiers, said at least one device (41, 42, 43 ) associated with the received identifier and transmit the image to the at least one device (41, 42, 43). 3. Intercom system according to one of the preceding claims, characterized in that said intercom system is configured to transmit the image (19) in a given resolution said weak, then transmit said image in a better resolution or transmit data to improve the resolution of said image, said computer application executable by said at least one first device (41, 42, 43) being configured to receive and display the weak resolution image, and then, when the quality of the communication network to which the connection is connected, first apparatus for receiving the higher resolution image or said corresponding data, displaying said resolution image. 4. Intercom system according to one of the preceding claims, characterized in that, in the absence of receiving a call control request beyond a given time, the intercom system is configured to control the module. GSM communication system (11) to call a default telephone number corresponding for example to a landline telephone number 5.A communication unit comprising an intercom system in accordance with one of the preceding claims and said at least one first device (41 , 42, 43) 6. An assembly according to claim 5, characterized in that, when the intercom system receives a call control request from said at least one (41) first device, called active device, to which the image has been transmitted, the intercom system is configured to control the GSM communication module (11) so as to call said second apparatus (41) whose number is included in the a call control request, while maintaining communication between the image communication module (12) and said active device (41). 7. An assembly according to claim 6, characterized in that, said at least one apparatus comprising a plurality of devices, called first devices (41, 42, 43), the intercom system is configured to transmit, vienne communication module d images (12), a request to cancel call to each of the first devices (42,43) other than the active device (41 days, so that the computer application executed by each of said first devices other than said active device , is configured to receive said call cancel request, to no longer display the picture and no longer makes it possible to transmit a call request request request to the intercom system. 8. An assembly according to claim 6 or 7, characterized in that said active device and the second device whose number is included in the call control request, are formed by the same device, such as a smart phone 9. An assembly according to one of claims 6 or 7, characterized in that said active device is a device devoid of GSM communication module, such as a tablet or a computer, and provided with a communication module for receiving a transmitted image by the image communication module (12) of the intercom system. Intercom process using an assembly according to one of claims 5 to 9, said method comprising the steps of: said method comprising the following steps: triggering a call request by a visitor from the interface (16) of the gatekeeper (1); capturing an image (19) of the visitor; transmission by the image communication module (12) from said visitor image to at least a first device (41), preferably to a plurality of first devices (41,42,43); - following an action of a user on the one or one of said first devices, transmission to the intercom system from the or one of said first devices, a telephone call control request including a telephone number of a second apparatus (41) to be called; - Calling the second device (41) by the GSM communication module (11).