Transmission of name information via the public Euro-ISDN network

0001The present invention relates to the transmission Name Information on public Euro-ISDN network (DSS1 protocol).

0002The Euro-ISDN protocol is a Europe-wide standardization national ISDN variants in a standard. Of the Main difference from the "German" ISDN is that in Germany previously used as signaling protocol 1TR6 has been. With Euro-ISDN, however, the so-called DSS1 protocol for signaling between subscriber premises used. The DSS 1 (Digital Subscriber Signalling System No. 1) is a system based on ITUI.411 Signaling protocol for the D channel of the Euro-ISDN.

0003The D channel is generally the signaling channel in ISDN protocol. In D-channel digital information streams transmitted in a frame-oriented HDLC protocol. about the D channel is performed in packet-oriented connection setup, the connection is released and the communication controller. The D-channel is thus a prerequisite for service integration and Mixed communications in ISDN. can also via the D channel a packet-switched data transmission are carried out, what some communication products for user communication is utilized. are thereby called via the D channel Messages (Messages) replaced.

0004In the present invention, in particular the possibilities are D channel used in a new way.

0005In Euro-ISDN protocol DSS1 are the features CNIP (Called Name Identification Presentation), CNIR and CONP (Connected Name Identification Presentation), ie the Transport of subscriber name over the public network, not possible.

0006The transfer of registered information of the communication partner (As additional information for the phone number) is, however, in today's PBX ( "Private Branch Exchange", PABXs) applications central part of the signaling. Since the public Euro-ISDN (DSS1) protocol, the Possibility of signaling name does not exist, can So name information in a cooperation of a PBX are not supported by public DSS1 network.

0007According to the prior art, the name can not be transmitted or are displayed when the call from a subscriber within same private telephone system (ie not through the public network) comes. Calling on the public ISDN network can only transmit the caller's number will.

0008It is therefore an object of the present invention, a way for transfer of registered information on public Euro-ISDN DSS1 network to provide.

0009According to the invention the object is achieved by the independent Claims resolved, the dependent claims develop the central Idea of ​​the invention in a particularly advantageous manner continue.

0010According to the invention therefore is a method for transmitting Information concerning the names of participants provided associated with a sending system and a receiving system are. The transmission from the transmitting system to the receiving system is carried out through a public Network in accordance with the Euro-ISDN (DSS1) protocol.

0011According to the invention, the information relating to the name of participants of the transmission in an information element transmitted SUBADDRESS a message of Euro-ISDN protocol, while still in the information element SUBADDRESS an identifier is inserted, which indicates that in this information element transfer a subscriber name information becomes. the identifier thus differs name information from a real Subaddressierung for which the information element SUBADDRESS is actually provided.

0012The insertion of the information relating to the names of subscribers the transmission in the information element SUBADDRESS the Euro-ISDN protocol can preferably take place only if a voice transmission is executed. For data transfers Namely, if appropriate, the information element SUBADDRESS already differently, ie in the sense of an actual Subaddressierung, occupied and therefore are no longer name information transfer to disposal.

0013As an information element for transmitting the subscriber name information in particular, the CALLING PARTY SUBADDRESS the ISDN SETUP message in the case of the sending System or the CONNECTED PARTY SUBADDRESS the ISDN message CONNECT used in the case of the receiving system will.

0014Prior to the transfer of the subscriber name information may reference be a table checked whether the relevant Participants, the sending to the receiving system or the exists, a name is assigned.

0015In the event that the subscriber is assigned a name, can reference the table continues to examine whether the Transfer the subscriber name information blocked or is released.

0016Furthermore, prior to the transfer of the subscriber name information to check whether the corresponding information element is SUBADDRESS free or already occupied, to avoid that the transfer of the subscriber name information in the SUBADDRESS information element with an actual Subaddressing or the like collides.

0017In the event that the subscriber name information a predetermined exceeds length, the subscriber name information will be reduced accordingly and continue a shortcut information inserted into the information element SUBADDRESS and are transmitted, the shortcut information indicates that the transmitted subscriber name information was shortened.

0018According to the invention is a telephone system according to the Euro-ISDN (DSS1) protocol provided. This telephone system includes a sending system and a receiving system, which are interconnected via a public network, wherein the sending system and the receiving system each Names can be assigned to participants.

0019According to the invention is the sending system and the receiving system so designed that the information relating to the names of participants in the transmission in an information element SUBADDRESS a message of Euro-ISDN protocol is transferable, in the information element SUBADDRESS further an identifier is inserted, which indicates that in this information element SUBADDRESS a subscriber name information Gets transferred.

0020The insertion of the information relating to the names of subscribers the transmission in the information element SUBADDRESS the Euro-ISDN protocol is carried out only if the sending System or the receiving system determines that a running voice transmission in accordance with the Euro-ISDN protocol shall be.

0021The information element for transmitting the subscriber name information can the CALLING PARTY SUBADDRESS the ISDN message SETUP in the case of the sending system and the CONNECTED PARTY SUBADDRESS the ISDN message CONNECT in case be on the receiving system.

0022In the sending system and the receiving system can each be provided a table based on the before transmission the subscriber name information is checked whether the participant, a name is assigned.

0023In the event that a subscriber is assigned a name, can be verified using the table continues, whether the transmission enabled the subscriber name information or is locked.

0024Prior to the transfer of the subscriber name information, the Check sending system and the receiving system, whether the corresponding information element SUBADDRESS free or already is occupied.

0025In the event that the subscriber name information a predetermined exceeds length, the subscriber name information will be reduced accordingly and continue an abbreviation Information inserted into the information element SUBADDRESS and are transferred, where the abbreviation Information indicating that the transmitted subscriber name information shortened has been.

0026The invention will now by way of example and described in more detail with reference to the accompanying drawings.

0027Show it: <dl tsize="8"><dt>figure 1</dt><dd>a schematic representation of the transmission of Name information between two PBX (PBXs) systems via the public Network in accordance with the Euro-ISDN (DSS1) protocol,</dd><dt>figure 2</dt><dd>an internal format of the transfer of the registered information in a PBX system,</dd><dt>figure 3</dt><dd>a sub-address of a message (Message) in accordance with the DSS1 protocol, and</dd><dt>figure 4</dt><dd>a schematic representation of a known ISDN transmission system.</dd></dl>

0028First is to, referring to FIG. 4 generally to a ISDN system to be discribed. Numeral 1 is a sending System referred. This sending system 1 can user information, such as languages ​​or information, via an ISDN connection 3 to a receiving system 2 transmitted via the so-called B channel.

0029As mentioned above, one D channel is further for signaling communication between the transmitting system 1 and the receiving system 2 provided.

0030According to the present invention, a signaling takes place the name information in the information element SUBADDRESS a message (Message) of the D-channel of the DSS1 protocol. This information element is used, additional address information transparent - ie without evaluation - on the public DSS1 network between the participating communication partner (Sending system 1 and receiving system 2) to signal. The SUBADDRESS element is shared with the numbers in the appropriate ISDN messages signaled.

0031For voice calls, the information element is SUBADDRESS not normally used. The name information may thus be copied in the information element SUBADDRESS will. The information element can SUBADDRESS an identifier obtained the one hand, not applicable to the Legal rule and on the other hand, the transfer of registered information distinguishable from a real sub address power.

0032It must be remembered that at the time of the usable length of the defined information element SUBADDRESS to 20 bytes.

0033By transporting the subscriber's name in the public network can thus also between two PBX (private branch exchanges) systems using the SUBADDRESS information element as supports the CNIP (Called Name Identification Presentation) or CONP (Connected Name Identification Presentation) are realized. In other words, a Participants names of each one of a transmitting and a receiving system is assigned to the respective other System are transmitted and there, for example in a Display display.

0034Within a PBX system accepts the so-called DH (device handler) -ISDN the task at DSS1 connections via the public network (channel S₀ and S_2M) Internally in Names used a PBX system within the DSS1 subaddress transferred to. This is however possible only when at Voice connections, the information element SUBADDRESS is used elsewhere. Another limitation is the maximum length of the information element SUBADDRESS of 20 Byte payload. Under circumstances must therefore the maximum Length of name used internally in the PBX 26 Bytes are truncated.

0035Referring to FIG. 1 is now to the transfer of registered between two PBX systems over a public network 3 being represented.

0036In Fig. 1 is a transmitting system 1 and a receiving System 2 shown that over a standard telephone line 7 together the public Euro-ISDN (DSS1) network can communicate. 3 The sending system 1 has an LM-Manager (Feature Manager) 5 on. The receiving system 2 has an LM-Manager. 6

0037In a DSS1 connection via the public network 3 reads the LM manager 5 of the sending PBX system 1 from a ZST message (Central Control Message) the payload of a FAC-IE (Facility Information Element) surgery NAME (NA) the sending PBX system 1, and transmits this user data in the SUBADDRESS information element (SUB) a message (Message) in accordance with the DSS1 protocol. In this form, the Name information of the sending system 1 associated Subscriber via the public Euro-ISDN network 3 by the Trunk 7 are transported. The LM manager 6 of the receiving PBX system 2 detects the information element SUBADDRESS the message as a carrier of information name and accepts this name information back into a FAC-IE (Facility information element) with surgery NAME.

0038External interfaces are on one side of the interface between the ZST (central controller) and the DH-ISDN (Device handler ISDN) 5 and 6 respectively and on the other side of the ISDN trunk line 7 with the DSS1 protocol.

0039Mail Between the ZST and the DH-ISDN 5 or 6 a FAC-IE with the name of the calling subscriber (Calling Party Name) or the responding node (Connected included Party Name) of the receiving system 2 from will.

0040An operation in the FAC-IE for transferring name is Euro-ISDN (DSS1) protocol only for the so-called Q-reference point (Leased lines) provided. Therefore names in DSS1 trunks 7 not received according to the prior art will. The information element for the Calling Party Subaddress the SETUP message or the Connected Party Subaddress the message CONNECT however offer some freedoms concerning the marking and coding of sub-address, so that the information element Calling party subaddress or Connected Party Subaddress of the present Invention can be used as a carrier of the name. This is possible if the information element Calling Party Subaddress or Connected Party Subaddress not already a contains real Subaddress in terms of sub-addressing in the network.

0041Referring to FIG. 2 is now the internal format of Name information in a PBX (private branch exchanges) system are explained.

0042The FAC-IE (Facility Information Element) Calling Party Name or Connected party name has, for example, in the system A6 (As an example of a PBX system) a fixed length of (ANZ_CHAR + 2), wherein ANZ_CHAR a constant, for example, 26 bytes of ZST (Central control) and PST communicable (peripheral controller) for the number internally Sign. "Number of characters" in Fig. 2 therefore indicates the number existing name characters.

0043The element "Pres.Ind." (Presentation Indicator) indicates whether the name may not be displayed or or if he does not is available. The following codes are used:<dl tsize="3" compact="compact"><dt>00</dt><dd>= Presentation allowed (name display enabled)</dd><dt>01</dt><dd>= Presentation restricted (name display suppressed)</dd><dt>10</dt><dd>= Name not available (name not available).</dd></dl>

0044As shown in FIG. 1, the mapping of name information a subscriber to a sending system 1 and receiving System 2 and the codes listed above in be a table 4 stored that the LM manager 5 of the sending System 1 or the LM manager 6 of the sending system 2 is assigned.

0045Referring to Fig. 3 will now be of the structure of an information element SUBADDRESS explained in accordance with the DSS1 protocol.

0046The information element identifier identifies the type of Information element, wherein the two with regard to the present coded invention of interest types as follows are:<dl tsize="9" compact="compact"><dt>01101101</dt><dd>= Calling Party Subaddress (Subaddressing the sending System 1f)</dd><dt>01001101</dt><dd>= Connected Party Subaddress (Subaddressing of receiving system 2).</dd></dl>

0047The type of subaddress is encoded as so-called NSAP, this the three bits of type must be assigned to the 000th Of the Odd / Even indicator of Fig. 3 (o / e) is only with BCD coding the address viewed. In the case of NSAP encoding contains Byte 4 an AFI (Authority and Format Identifier), which the character set of the information element indicating SUBADDRESS. The range 00-09 (hex) is for internal use reserved and used as part of the present invention as an identifier for the transport of the name in the information element SUBADDRESS.

0048Basically, all messages the LM manager 5 or 6 to hand over. Here messages from the ZST to the DSS1 Trunk 7 name information in FAC-IE with the OPC (Opcode) Calling Party Name included. news of the DSS1 exchange line 7 to the ZST can now name this information in the information element of SUBADDRESS contain message SETUP or CONNECT if the information element Calling party subaddress or Connected Party Subaddress is used as a carrier therefor.

0049With existing OPC (operation code) Calling Party Name or Connected Party Name in FAC-IE (facility information element) be in the context of the LM manager 5 or 6 for the functions Enter the name information in the information element SUBADDRESS called. Depending on the OPC (operation code) therefore, uses one of the functions described below.

0050First entering a FAC-IE (Facility to information Element) "Calling Party Name" in the information element "Calling Party Subaddress" are explained.

0051This function is on the table entry OPC (Operation Code) "Calling Party Name" called. It is first checked, whether the message is a message SETUP acts as any other message no information element Calling party subaddress can be entered. furthermore is the interface functionality and mode the system queried. A transfer of the registered information in this way is only for Euro-ISDN lines 7 carried out using DSS1, however, in all other cases will be canceled processing.

0052The FAC-IE is on the Presentation Indicator (see Fig. 2) been checked to see if the name information displayed must not be, or whether they or available at all is. If the entry of the Presentation Indicator "Name not should be available ", is no transfer of the registered information made in the SUBADDRESS information element. The same applies if the entry "Presentation restricted" (Name information suppression) is present.

0053The SUBADDRESS information element can only support the serve name information when the information element Calling party subaddress is not for real Subaddressing is used. For this reason, a query is made, whether the information element Calling party subaddress already is available or occupied. Usually, however, is in voice connections This information element is not occupied.

0054The character set of name information is not in the information element SUBADDRESS transmitted, it is rather the ISO-8859-1 provided.

0055The name information (not shown) in a buffer for inclusion in an information element Calling Party Subaddress) cached. Here, up to a maximum of over 19 bytes of the name information. It has already been Note that the maximum length of the freely assignable Information in an information element SUBADDRESS 20 Byte is. However, since the names of the OPC information (Calling Party Name) be in FAC-IE maximum 26 bytes long may be in Odd / Even Indicator (see Fig. 3) of the information element SUBADDRESS a bit is set, if the name shortened becomes. As NSAP coding is used, as 0x09 AFI is entered. In this coding, the Odd / Even Indicator (o / e in Fig. 3) of the information element SUBADDRESS, which is only in BCD encoding of meaning, no other function. Finally, through the Message Dealers said information element Calling party subaddress in the message added.

0056To enter a name information of a FAC-IE "Connected Party Name "in an information element" Connected Party Subaddress ", starting from the receiving system 2 first this function from the table entry of the FAC-IE "Connected Party Name" called. It is this first checks whether the message is a message Connect acts as any other message no information element Connected party subaddress can be entered. Of the further procedure is analogous with respect to the explanation the registration of the FAC-IE calling party name in an information element Calling party subaddress.

0057Now is the reading of the information element Subaddress are explained.

0058After editing the FAC-IE a message and the active Features are still some special message types viewed from LM Manager 5 and 6 respectively. In the news SETUP and CONNECT is checks if the information element contains SUBADDRESS name information, then in a FAC-IE Calling Party Name or Connected party name registered can be. Accordingly, two functions for analysis and registration required.

0059First is doing the reading of the information element Calling party subaddress and the entries of the resulting explained information into a FAC-IE Calling Party Name will.

0060With this function, it is checked whether the message SETUP an information element Calling party subaddress available is. It can be either a real name information the calling party from the transmitting system 1 ago act, as well as a true sub-addressing in the actual Meaning.

0061If the message with Type NSAP and the AFE encoded with 0x09, is it in the SUBADDRESS information element actually the name of the calling party information of the sending system 1 ago. If this is not the case should be, in this case, the real subaddressing not changed and will not run the rest of the sequence.

0062If there has been a name information is in an array for registration in the FAC-IE calling party Name this name information cached. The Presentation Indicator (s. Fig. 2) is set to "Presentation allowed" (Display enabled) is set, since only such names Information transmitted in the information element SUBADDRESS be (s. above). The character set is automatically set to ISO-8859-1 set because this character set for general information name is used for example in A6 systems.

0063About the Odd / Even Indicator (s. "O / e" in Fig. 3) is detected, that the name information for transmission of the in the SUBADDRESS information element in accordance with the DSS1 protocol was reduced, so that in this case, a point behind the name information is set and will thus appear.

0064The MH is now the FAC-IE is now the FAC-IE Calling registered party name in the message and the information element Calling party subaddress is from the message away.

0065Now is the reading of the information element Connected Party Subaddress and entering the information obtained therefrom in the FAC-IE Connected Party Name of the sending System 1 will be explained. This function is checked, whether an information element in the CONNECT message Connected party subaddress is present. This may be also a real information of the calling party, act in this case, the receiving system 2, as well as a true sub-addressing. The further course runs However, analogous to the above with respect to the reading of the information element Calling Party Subaddress said.