FR2843262A1 - Service access provision mobile telephone telecommunications system having distinct channel additional normal channel communicating server allowing terminal server telephone services provision. - Google Patents

Abstract

The mobile telephone telecommunication system has, in addition to the normal signalling channel a distinct channel (18,24) communicating with a server. This allows the terminal (10) to provide telephone services using the server.

Description

TELCOMMUNICATION SYSTEM, AND SERVER AND TERMINAL FOR THIS

SYST ME

  The invention relates to a mobile telecommunication system as well as a server, a terminal and a terminal accessory of such a telecommunication system. A mobile telephone network, such as, for example, the GSM network, comprises a radio access network composed of cells, limited geographical expanses and within each of which is disposed a base station via from which all the mobile communications in this cell pass, the base stations are connected to a core network.b These mobile cellular networks have been developed to offer mainly basic telephone service and their architecture is similar to those of conventional fixed telephony networks. In particular the signaling is that which corresponds to the CCITT SS7 standard between nodes of the network both for the establishment of calls and to access additional services. An essential organ of a mobile network is an MSC / VLR switch which is a dedicated telephone switch for mobile networks for access to the core of the network, combined with a database containing all mobile information that is managed at at a given moment by this specialized telephone switch. The name MSC comes from the English phrase "MobileService Switching Center" and VLR comes from the phrase "Visit Location Register". These switches are complex equipment made in the form of specific computers with a software for processing telephone calls. This software has been developed in successive layers and constitutes a set of more

in addition complex and little evolutionary.

  The invention results from the observation that the complexity of the SS7 signaling protocol combined with the rigid architecture of specialized switches for mobiles prevents the introduction of certain telephone services that are now available in conventional telephony with PABX or Centrex switches. . The services currently available in fixed telephony include automatic callback, call screening, group calling, double calling, call transfer, etc. This lack of mobile telephony services is particularly troublesome, because the mobile phone tends to be used systematically to

place of the landline.

  The invention allows the introduction of functions in

  mobile telephony without modifications of the corresponding network.

  The telecommunications system according to the invention is characterized in that it comprises a server connectable to the mobile via a communication channel distinct from the telephone signaling channel exchanged with the specialized switch, this server comprising means to provide services to the terminals. The communication channel for the connection to the server is physically separate or

  logically from the telephone signaling path.

  Thus, in a particularly simple way, the

  possibility to provide various services in mobile telephony.

  For example, the server comprises means for memorizing at least the state of each mobile to communicate this state to a calling mobile. With this system, prior to the triggering of a telephone call, it is possible to check the availability of the requested terminal, which allows the caller not to trigger the call itself and thus to avoid connecting to voicemail from

  the called party with, in general, the corresponding taxation.

  Moreover, since the calls between mobiles are not carried out systematically, the invention makes it possible to minimize

congestion of the network.

  In one embodiment, the server also comprises means for proposing to the caller an automatic callback of the called party. Other actions or services offered to the user are, for example, charging on demand, or

  filtering in the case where subscribers are grouped.

  According to one embodiment, the server is connected to the mobile via a SMS (Short Message Service) communication channel and / or by a type A or B GPRS channel.

  and / or by a UMTS channel, and / or by a CDMA channel.

  It is recalled here that the SMS channel transits through the core of the network but uses a signaling distinct from the

  call signaling, such as GSM signaling.

  It is also recalled that the GPRS (General Packet Radio Service) channel makes it possible to connect the mobile telephone networks to the Internet, or, more generally, to networks using the IP protocol. It is preferable that the telecommunications system is such that the mobiles have the possibility of accessing the server both via the SMS channel and the GPRS channel. In this case, the terminals that do not have the GPRS channel communicate with the server via the SMS channel. Similarly, Class B GPRS terminals with only one GPRS channel will use the SMS channel to communicate with the service server when the GPRS channel is already in use for data transfer or for a data transfer.

telephone communication.

  When the double SMS and GPRS path is planned, it is preferable to give priority to the GPRS path because the delivery of the messages by the SMS channel takes more time, in

average 10 seconds.

  In general, the connection to the service server will be preferred over an IP network. Thus, in addition to GPRS and tUMTS, it is possible to use a radio access network of "Wireless Lan" type such as one of those corresponding to the IEEE 802.11b, IEEE 802.11a and "Blue Tooth" standards. It is also possible to use an IP broadband fixed access network of ADSL, SDSL or VDSL, FTTB, FTTH and HFC type. It is recalled here that the FTTP and FTTH networks are optical fiber networks towards the buildings or the apartments while the HFC network is

  a mixed network with coaxial cable and fiber.

  The invention relates not only to a telecommunication system but also to each of its elements considered individually, namely the service server and the mobile terminal. It also relates to a method of providing services in a system of

  mobile telecommunications and associated signals.

  Thus, a terminal according to the invention comprises means for communicating with a service server via at least one signaling channel that is different from the calling channel in order to request and obtain services by this server. For example, prior to a call itself,

  the terminal can determine the state of the called terminal.

  The means of communication with the server is, for example, in software form. It is found either in the

  terminal itself, either in a SIM card.

  The invention also extends to a SIM card comprising

such a way.

  A service server according to the invention comprises means for connecting it to mobile terminals via a separate channel of call signaling. This server preferably comprises means for

  record the status of each mobile.

  The service server comprises, in one embodiment, a semi-permanent database for identifying, for example by their telephone numbers, the users who can access the services. By users, we mean here either individual terminals, or sets of terminals forming for example a group of users. The server also includes a dynamic database in which is noted at least (in one example) the state of the mobile, that is to say in particular if the mobile is available, busy or unreachable, that is to say to say that it is no longer under cover or is off. This dynamic data may further include data relating to additional services such as automatic recall or filtering. They can also include dynamic service management parameters of a set

  users, such as group line management pointers.

  For example, for a group of users the service allows

  determine the terminal to which the next call will be presented.

  For updating the dynamic databank, the server includes means for receiving the connection, disconnection and location information

transmitted by mobiles.

  When the server manages groups of subscribers, it includes means to memorize the services to which the group members are entitled and to update these services,

  including enabling and disabling them.

  In one embodiment, each mobile is assigned an IP address. In this case, the server must know the

  correspondence between the mobile number and this IP address.

  Thus, the invention relates generally to a telecommunication system, in particular a mobile telephone system, which is characterized in that it comprises, in addition to the usual signaling channel, a separate channel for communicating with a server so that terminals may use services, especially telephone services, provided by

through the server.

  The communication channel with the server comprises, for example, at least one channel included in the group comprising

  a GPRS channel, an SMS channel, a UMTS channel and a CDMA channel.

  The communication channel with the server can

furthermore include an IP channel.

  When the system includes, for communication with the server, an SMS channel and a GPRS channel, the GPRS channel is

  preferably over the SMS channel.

  In one embodiment, the server comprises means for coordinating services between terminals by sending them commands, proposing them actions and receiving from these terminals information such as their occupation status

or reachability.

  The server comprises, according to one embodiment, means for storing terminal groups and means for enabling, in each grouping, at least one of the following functions: diverting a call from a filtered terminal to a terminal filter, interception of call and choice of terminal to connect for an incoming call for the grouping. The invention also relates to a server for a telecommunications system, in particular for mobile telephony, which is characterized in that it comprises an input connectable to terminals of the system via a separate channel of the call signaling of to provide terminal services. In one embodiment, the server comprises means for receiving information on the state of occupation or reachability of the terminals and means for transmitting this

  information to calling terminals.

  The server may comprise means for storing data relating to groups of terminals. In this case, the data relating to the grouped terminals includes, for example, data relating to the filter terminals and the

  filtered terminals and line associations.

  The server comprises, in one embodiment, means for temporarily storing service indicators relating to terminals. The service indicators are, for example, included in the group consisting of: automatic call back, filtering, call charges, messages

  unavailable, call by name, and group call.

  The connection path to the terminals comprises, for example, at least one channel included in the group comprising:

  an SMS channel, a GPRS channel, a UMTS channel and a CDMA channel.

  In this case, the server may be connectable to the terminals via an IP channel connected to said connection channel. In one embodiment, the server comprises means for transmitting to a called terminal while it was busy or not reachable, information on a terminal having it

  called when it is unavailable.

  The invention also relates to a terminal, in particular of the mobile type, for a telecommunication system characterized in that it comprises means for receiving via a separate channel the signaling channel

  call, at least one service provided by a server.

  In one embodiment, the terminal comprises means for transmitting, prior to the call signaling, a request to the server for information on the state of occupation or reachability of a called or called terminal, this request being transmitted through

  said separate path of the call signaling path.

  The terminal may include means for transmitting to the server, by the same pathway separate from the

  call signaling, a signal representative of its state.

  The communication channel with the server is, for example, included in the group comprising a GPRS channel, a

  SMS channel, UMTS channel and CDMA channel.

  In one embodiment, the terminal includes means for automatically confirming the call when it receives

  information that the called party is available.

  The terminal comprises, in one embodiment, a means for requesting the server for an automatic callback of the called terminal when the latter is not available. In this case, the terminal may comprise means for transmitting to the server information prior to its unavailability, this information preferably comprising a message relating to this unavailability. According to one embodiment, the terminal comprises means for transmitting to a called terminal a charging request to this called party which is transmissible to the latter via the server. In this case, the terminal may comprise means for transmitting, via the server, to a calling terminal a refusal information of

charging for this call.

  In one example, the terminal comprises means for transmitting to the server a data of deviation, to another

  terminal, calls intended for it.

  In one embodiment, the terminal comprises means for receiving, preferably via the server, an indication that the incoming calls intended for another terminal are directed towards this terminal which then constitutes a filter for the other terminal, a means for, during an incoming call, inform the other terminal, said filtered, that a call is intended for him, and a means to temporarily remove the filtering

  to connect the incoming call to the filtered terminal.

  The means for communicating with the server may be incorporated in a removable element, such as a

SIM card.

  The invention also relates to an accessory for a mobile telephone terminal, in particular a SIM card, which is characterized in that it comprises means for the terminal to be connected to a service provider server via a channel. distinct from the call signaling path. Other features and advantages of the invention

  will appear with the description of some of its modes of

  embodiments, this being done with reference to the attached drawings in which: FIG. 1 is a diagram of a network of

  telecommunication according to the invention.

  In the example shown in FIG. 1, a mobile terminal telecommunications network 10 is provided. Each mobile terminal communicates with the network via a base station 12 (or "node B" in the case of the UMTS system. ) in a cell. Each base station is controlled by a control station 14. The base station is in communication with the core of the network via a dedicated telephone switch MSC 16 which makes it possible to communicate with each other the various fixed or mobile terminals . The signaling attached to each communication, such as the signaling of the GSM standard, passes through the

switch 16.

  SMS data also flows through

through switch 16.

  Furthermore, each mobile 10 can also be connected to an IP network via a GPRS channel 18. For this purpose, in a manner known per se, the terminal 10 communicates with a specialized router 20 or SGSN (" GPRS Service Support Node ") which is in connection with another router 22 connected to one or more IP or X25 data networks. This router 22

  is sometimes referred to as GGSN (Gateway GPRS Support Node).

  When the terminal 10 wants to communicate with another terminal (not shown), it transmits a call signal, for example according to the GSM standard, and this signal is transmitted to the

  switch 16 which retransmits the call to the called terminal.

  The invention also uses another signaling channel which is, in the example, constituted by the

SMS 24 and / or GPRS 18.

  This or these other signaling channel (s) is (are) connected to a server 28 via an IP network. Thus, as shown in FIG. 1, in the example, the channel 18 is connected to the server 28 via the

Internet network 30.

  The service server 28 is also connected to the SMS channel 24 via an SMSC server 32 connected to the GSM network via a switch 34 of the same type as the switch 16. This server makes it possible to transmit and of

receive SMS messages.

  Instead of the server 32, there may be provided a facilitator for access to an operator network (sometimes

called "broker").

  The server 28 is intended to memorize the state of each

  terminal and to transmit this state to the calling terminals.

  In addition, in the example, the server provides other services distinct from the telephone switching as described

further.

  The server 28 being connected to an IP network, it can be controlled by an operator distinct from the mobile operator, for example by an MVNO operator, that is to say an operator having a radio network infrastructure

  its own ("Mobile Virtual Network Operator").

  The simplest service provided by the server 28 reachable by the channel 24 and / or 18 is as follows: when the terminal 10 calls another terminal, software in this terminal or in its SIM card, communicates with the server 28 , prior to the call itself, so as to determine the state of the called terminal. The "state" of the called terminal means that it can communicate, that it is busy, that it is out of coverage or that it is off or that it is

refuse the calls.

  Thus, the server 28 comprises means for communicating, also by the channel 18 and / or 24, with the called terminals in order to determine their state. Once this information has been obtained by the server, the latter transmits it to the calling mobile and the latter can then effectively call, by conventional call signaling, the terminal it

wish to join.

  This operation is illustrated by the table below.

  Simplest case (B is free) Mobile A Subscriber A Server Subscriber B Mobile B B free Call B requested

D. B

  Status request B Free state request BB Free state Call A -> B Logout Log off A free B free * '4 Each terminal comprises, in the terminal itself or in its SIM card, a means, in particular a software, for, previously to the actual call, connect to the server 28 to check the state of the called terminal. Likewise, each terminal includes means for automatically answering

  a status request sent to it by the server 28.

  It should be noted that, preferably, the information on the state of the called party is provided, for example on a screen, at the caller's terminal and, in this case, the caller has the manual way of the caller's terminal. ability to confirm the call, if the called party is free, or to give up the call if it is busy or out of coverage, or, in general, not reachable. In any case in this case, compared to the current systems, the service offered does not result in the occupation of the mobile telephone network and makes it possible to avoid connecting automatically, by

  a tariffed link, to the called party's messaging.

  The system according to the invention also allows an automatic callback when the called party is busy as shown in the table above: Automatic callback on busy (busy B) Mobile A Subscriber A Subscriber server B Mobile B Call B requested * 4 Request status B Request status BB status busy or not reachable Automatic recall (RA) on B? (Y / N) (Y = yes, N = no) If 0, request RA on B return under coverage B free state B free, Confirm call (Y / N) AFA Call A -> B It appears from this last table that the caller has on his terminal a menu allowing him to choose the automatic callback service or to refuse this service when the called mobile B is in the busy or not reachable state. Similarly, when the called party becomes reachable, the caller has the

  possibility to confirm or not the call.

  The telecommunication system also allows for an automatic call back when the call is interrupted in an undesired manner, for example because the caller or called party is in a situation of non-coverage. This service is represented by the following table: Automatic Callback on Cover Communication) Released (B becomes off Mobile A Subscriber A Subscriber Server B Mobile B Logout Mobile Log Off Coverage A Free Automatic Callback (RA) on B If 0, Request RA on B P. Mobile under cover B reachable AB free state Alternatively, the automatic callback is proposed to

subscriber B income under cover.

  The telecommunication system also allows, according to another embodiment, to notify a terminal that it has been called while it was busy and possibly to provide the called party with the number of the caller, as illustrated by the table below: Call notification A during busy B Mobile A Subscriber A Server Subscriber B Mobile B Call B requested Status request B Request status BB busy status Automatic redial on B? (Y / N) If N, record the call attempt to B Disconnect / return under cover B free Notification call A This call notification is especially relevant when the caller did not select the call back option automatic. Another service that can still be provided by the telecommunication system considered in the example is to allow each mobile to refuse the communications and to provide this information to the server 28 which keeps it in memory and the

communicate to all callers.

  This service is represented by the following table: Do Not Disturb (NPD) Mobile Subscribed to A Subscriber Server B Mobile BB NPD state (with associated message) Call B requested Request status BB state NPD (with associated message) Display message with Acknowledgment A

*

  NPD cancellation The associated message stored in the server is, for example, the duration of the downtime and possibly the

  person to contact during this time.

  On the latter table it is observed that when the calling subscriber A seeks to join the called B, it is not necessary to establish a communication between the server and the called mobile B since the server already has the state of

the called in memory.

  According to yet another embodiment, the telecommunication system makes it possible to charge the called party, that is to say, to charge the call by the subscriber of the call.

  called number if the latter accepts it.

  This service is represented by the following table: Charging to the called party (A -> B replaced by B -> A) Mobile A Subscriber A Subscriber B Mobile B Activation request TD (charging to the called party) Activation request of the TD Registered request D Status request B Logout tSi B busy B free Callback request A __ Callback request A (Y / N?) If 0, Call A <- B If N, notification of refusal (through the server) Reason for refusal with Acknowledgment A

i _h.

  The charging to the called party is thus as follows: the caller A has in his menu a possibility of charging the called party, that is to say the number called. In this case, this request is transmitted by the server and if the called party accepts, it is the latter who initiates the call. If he refuses, the refusal is communicated to the appellant through the lane

secondary SMS or GPRS.

  In one embodiment of the invention, provision is made

  also group telephony services.

  In the example, n filter terminals and p filtered terminals are provided. Incoming calls for the filtered terminals are transmitted to the terminal, or the terminals, corresponding filter (s). For this purpose, the server 28 permanently has information relating to the filter and filtered states of the terminals. This information is transmitted by the filter terminals. For this purpose, the server periodically polls the filter terminals. If at the time of this interrogation the filter terminal is busy, or, in general, not reachable, the update is deferred until the

availability of this terminal.

  Thus, each terminal has a means for unconditionally forwarding incoming calls to a specific filter station. This filtering and this return can be activated and deactivated by a single operation of the filtered terminal thanks to

  for example, to a terminal menu.

  It should be noted that the calling terminal (mobile or fixed) is not necessarily connected or connectable to the

server 28.

  The group telephony service operates as follows: An incoming call to a filtered terminal is directed to the corresponding filter station. The status of the filtered terminal is displayed on the screen of the filter terminal to provide an indication or reminder for the user of this filter terminal. This filter terminal thus has a key for stopping incoming calls in order to perform the following operations: If the filter terminal is free, on its screen it is offered a double call to the filtered terminal. However, it is necessary, to allow the direct communication between the caller and the filtered call, to momentarily suppress the call. For this purpose, the double call of the filter to the filtered is automatically preceded by a signal in the form of an SMS message or a message on the GPRS channel, via the

server 28.

  Returning the filtered to the filter is reactivated

  automatically immediately after call setup.

  If the user of the filtered terminal accepts the incoming call, the user of the filter terminal takes this incoming call again

and frees himself from it.

  If the filtered user refuses the call then the user of the filter takes the incoming call, for example to write a message

or an appointment.

  Alternatively, the filtered terminal returns all incoming calls to the filter, except calls from the filter terminal itself. In this case, the delete action

of referral is useless.

  In another variant, instead of temporarily deleting the forwarding, leterminal filter triggers the sending of a message to the filtered terminal to prevent it from calling

the filter terminal.

  In all cases, in this example, the caller's details are transmitted to the filtered terminal for him.

  allow to make the call by simple confirmation.

  If the filtered terminal is busy, an SMS message is automatically sent from the filter terminal to the filtered terminal via the server 28, as well as the display of a message on the screen of the filtered terminal to inform it to call back the filter terminal. This last message is preferably displayed at the end of the current call not to

  disrupt the user during a call.

  In this case, if the user of the filtered terminal decides to take the call, he can put the call engaged (that is to say

  the previous call) on hold and call the filter terminal.

  If the user of the filtered terminal ignores the message indicating a new incoming call while it is already engaged, or if the user decides after calling the filter terminal not to take the call, the user of the filter terminal manages so

  directly following the incoming call.

  The table below is an example of exchanges

following an incoming call.

  In this table, A represents the incoming call, B the

filtered and C the filter.

  Group telephony: Exchanges following an incoming call (free B) Forwarding Mobile C Subscriber C Subscriber B Mobile B Incoming call from A with status display of B.4 (SMS message with A settings (also allows to the server to know that C is busy) 1 J SMS message with parameter of A é * + request to delete Call B vern Call C -> B with call waiting busy with A Call B -> AC goes back to A and releases the call 3 C * The message must arrive before transferring the call from A to B

  to allow the temporary cancellation of the return.

  The table below represents exchanges following

  an incoming call while the filtered mobile B is busy.

  Group telephony: Exchanges following an incoming call (Busy B) Mobile C Subscriber C Subscriber B Mobile B Incoming call A with status display of B SMS message with AC parameters occupied by B> SMS message with parameters of A Call Waiting Call B -> C with hold call waiting <B free B occupied by A Call B -> AC will return to A and release the call immediately or when the BC call is established, A Another service that can be provided by the server 28 is that the latter contains a directory by name usable by the mobile. In this case, the terminals can dial a called name and the server translates this name into a corresponding number. If several subscribers have the same name, a

selection is proposed.

  The invention also allows the calls of the group using the server 28. In this case, a set of terminals has the same call number and the server chooses the terminal to call according to one or more predetermined criteria (s) ( s) such as the free terminal whose last solicitation is the oldest. It is also possible for the server to send to all the terminals of the group a message informing them of an incoming call for the group and this call will be transferred to the group.

first terminal answered.

  In one example, a subscriber belongs to several

  groups of users with the same terminal and the same number.

  Although in the examples described, the channel intended to communicate with the server is a channel that is physically distinct from the signaling channel, it goes without saying that this communication channel with the server can only be logically distinct from the signaling channel. 'ie to use the

same physical channel.

  Furthermore, it can be noted that in general, an interaction is used between the information transmitted via the connection channel to the server and the signaling information. In a first example of such an interaction, a call made by a subscriber is considered. The called number is communicated to the SIM card of the mobile and the latter orders a mobile status test called in the following sequence: the SIM card temporarily cancels the requested call this SIM card sending a requested status request message to the mobile phone. server 28, and if the answer is that the requested number is free,

  the previously requested call is restored.

  So, in this case, the interaction between the two paths

is initialized by the subscriber.

  In a second example, the interaction between the two channels is initiated by a network event. To fix ideas, consider an incoming call to a filtering station and for a filtered station. It is recalled here that the filtering was carried out thanks to a command of the filtered station which was

communicated to the server 28.

  The incoming call message is communicated to the SIM card of the filter station and the latter proposes to the user a double call to the filtered station or the sending of a message if the filtered station is busy. In this case, the operation is as follows: Receipt by the SIM card of the filtering station of the outside call. The SIM card of the filter station proposes to call the filtered station and put the external call on hold. If the user of the filter station responds positively,

  it is the SIM card that makes the call and put on hold.

  The operation can also be initiated by the server. As an example of such a situation, the processing of an automatic recall is considered. When the mobile to call back automatically reported to the server its return to availability, the sequence of operations is as follows: The server sends a message to the calling mobile waiting. This information received from the server is provided to the SIM card of the caller who proposes the callback and, in the case of

  positive response, the SIM card resets the call.

  The interaction between the two channels can also be independent of the calls. Thus, in the case where the server systematically receives all the mobile state changes, the server includes means for providing services

  conditioned by the state of this mobile.

  Finally, the interaction can be determined by subscriber commands conditioning the calls. Thus, the activation, by the subscriber, of a service such as a filtering or the taxation of the called is a command that is communicated to the server to allow the latter to offer

  corresponding services during future calls.

  Although the invention has been described with reference to a mobile telecommunication system, it also applies to fixed telephony, that is to say that the server 28 can be used for telephony services fixed, the mobile terminals 10 can be replaced by

fixed telephony terminals.

Claims (28)

  1. A telecommunication system, in particular a mobile telephone system, characterized in that it comprises, in addition to the usual signaling channel, a separate channel (18, 24) for communicating with a server (28) so that the terminals (10) ) may use telephone services in   particular, provided through the server.   2. System according to claim 1 characterized in that the communication channel with the server comprises at least one channel included in the group comprising: a GPRS channel   (18), an SMS channel (24), a UMTS channel and a CDMA channel.   3. System according to claim 1 or 2 characterized in that the communication channel with the server (28) comprises in addition an IP channel.   4. System according to claim 3 or 4 characterized in that it comprises for communication with the server an SMS channel (24) and a GPRS channel (18), the GPRS channel being   priority over the SMS channel.   5. System according to one of claims 1 to 4,   characterized by the fact that the server comprises means for coordinating services between terminals by sending them commands, proposing them actions and receiving from these terminals information such as their state of occupancy or of reachability.   6. System according to one of claims 1 to 5   characterized in that the server (28) comprises means for storing terminal groups and means for enabling, in each grouping, at least one of the following functions: diverting a call from a filtered terminal to a terminal filter, interception of call and choice of terminal at   connect for an incoming call for grouping.   7. A server for a telecommunication system, in particular for mobile telephony, characterized in that it comprises an input connectable to terminals of the system via a separate channel of the call signaling so as to provide services to the subscribers. terminals. 8. Server according to claim 7, characterized in that it comprises means for receiving information on the state of occupation or reachability terminals and means for transmitting this information to terminals callers.   9. Server according to claim 7 or 8 characterized in that it comprises means for storing data   relating to groups of terminals.   10. Server according to claim 9, characterized in that the data relating to the grouped terminals comprises data relating to the filter terminals and to the filtered terminals. and line associations.   Server according to one of claims 7 to 10   characterized in that it comprises means for temporarily storing service indicators relating to terminals. 12. Server according to claim 11 characterized in that the service indicators are included in the group comprising: automatic call back, filtering, call charges, unavailability messages, call by name and the group call.   Server according to one of claims 7 to 12   characterized in that the connection path to the terminals comprises at least one path included in the group comprising   an SMS channel, a GPRS channel, a UMTS channel and a CDMA channel.   14. Server according to claim 13 characterized in that it is connectable to the terminals via a   IP channel connected to said connection channel.   15. Server according to one of claims 11 to 14   characterized in that it comprises means for transmitting to a called terminal while it was busy or not reachable, information on a terminal having called it in its state of unavailability. Terminal, in particular of the mobile type, for a telecommunication system characterized in that it comprises means for receiving via a separate channel of the call signaling channel, at least one service provided by a server. . 17. Terminal according to claim 16 characterized in that it comprises means for transmitting, prior to the call signaling, a request to the server for information on the state of occupation or reachability of a called terminal. or to call, this request being transmitted through the said distinct path of the call signaling.   18. Terminal according to claim 16 or 17 characterized in that it comprises means for transmitting to the server, by the same pathway separate from the signaling channel.   call, a signal representative of its state.   Terminal according to one of claims 16 to 18   characterized in that the communication channel with the server is included in the group comprising a GPRS channel (18), a   SMS channel (24), a UMTS channel and a CDMA channel.   20. Terminal according to claim 17 characterized in that it comprises means for automatically confirming the call when it receives the information that the called is available. 21. Terminal according to claim 17 or 20 characterized in that it comprises means for requesting the server an automatic callback of the called terminal when last is not available.   22. Terminal according to claim 18 characterized in that it comprises means for transmitting to the server information prior to its unavailability, this information preferably comprising a message relating to this unavailability.   23. Terminal according to one of claims 16 to 22   characterized in that it comprises means for transmitting to a called terminal a charging request to that called party which is   transmitted to the latter via the server.   24. Terminal according to claim 23 characterized in that it comprises means for transmitting, via the server, to a calling terminal information refusal of charging for this call.   25. Terminal according to claim 18 characterized in that it comprises means for transmitting to the server data deflection, to another terminal, calls that him are destined.   Terminal according to one of claims 16 to 25   characterized in that it comprises means for receiving, preferably via the server, an indication that the incoming calls intended for another terminal are directed towards this terminal which then constitutes a filter for the other terminal, a means for, during an incoming call, inform the other terminal, said filtered, that a call is intended for it, and a means for temporarily removing the filtering to connect   the incoming call to the filtered terminal.   27. Terminal according to one of claims 16 to 26   characterized in that the means for communicating with the server are incorporated in a removable element, such as than a SIM card.   28. Accessory for mobile terminal, including SIM card, characterized in that it comprises means for the terminal to be connected to a server service provider via a separate channel   of the call signaling channel.