3GPP2 X.S0004-512-E Version 1.0.0 Date: March 2004

ITU-T SS7 Transport Signaling Protocols Revision History

Revision Date Rev. 0 Initial Publication March 2004 X.S0004-512-E v1.0

1 2 PART 512 3 4 5 6 1 ITU-T SS7-BASED DATA TRANSFER 7 8 SERVICES 9 10 The ITU-T SS7-based Data Transfer Services are comprised of the International 11 Union Signaling System 7 (MTP) plus Signaling 12 Connection Control Part (SCCP). 13 14 15 16 1.1 MESSAGE TRANSFER PART 17 18 The MTP is defined in ITU-T Q.701 - Q.710, with the following supplemental information. 19 20 The MAP messages that are transported on an intersystem basis may be assigned a message priority 21 value of either 0 or 1. The INVOKE, RETURN RESULT, RETURN ERROR, and REJECT 22 components associated with the same operation (e.g., LocationRequest) shall have the same 23 message priority value. The recommended message priority values are as described in 24 TIA-41-511-E Section 1 Message Transfer Part. 25 26 The message priority value may be determined by the TIA-41 MAP based on the message type and 27 may be passed down to the MTP through the SCCP. 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 512-1 ITU-T SS7-BASED DATA TRANSFER SERVICES X.S0004-512-E v1.0

1.2 SIGNALING CONNECTION CONTROL PART 1 2 3 For TIA-41 applications, the SCCP is defined in ITU-T Q.711 - Q.714, with the following exceptions 4 and limitations: 5 6 • The SCCP Class 0 connectionless service is requested from the SCCP. (However, in accordance 7 with SCCP procedures, if a TIA-41 message is segmented by the SCCP, the sequence of XUDT 8 messages carrying the segments is sent using SCCP Class 1 sequenced connectionless service. 9 The In-Sequence Delivery Option field of the segmentation parameter within each of the XUDT 10 messages is set to 0 to reflect the original request for Class 0 service) 11 12 • Whether to set the return message on error or discard message on error option in the Protocol 13 Class parameter of the UDT or XUDT message is at the discretion of the implementation. If 14 return message on error is requested by the SCCP user for a segmented message, then only the 15 first XUDT message shall have return message on error requested. 16 17 • Use of the following SSN values is recommended: 18 19 - 5: (MAP) 20 - 6:Home Location Register (HLR) 21 - 7:Visitor Location Register (VLR) 22 23 - 8:Mobile Switching Center (MSC) 24 - 9:Equipment Identification Register(EIR)/Equipment Identification Center (EIC) 25 26 (reserved)1 27 - 10:Authentication Center (AC/AUC) 28 29 - TBD: Short Message Service (SMS)2 30 - TBD: Over-The-Air Service Provisioning Function3 31 32 • In accordance with ITU-T Q.713 an SSN is recommended to be included in all messages even 33 if message routing is based on Global Title Translation (GTT). The null SSN (i.e., value 0) 34 should be used when the subsystem is not known (e.g., before a global title translation takes 35 36 place). 37 • Global title addressing is required on the SCCP Called Party Address and the SCCP Calling 38 Party Address for international roaming purposes. 39 40 • Global Title Translation on Mobile Identification Number (MIN) for communication with an 41 HLR or MC is left to mutual agreement. 42 43 44 45 46 47 48 49 50 51 52 53 54 55 1 Detailed transactions relative to SSN value 9 are for further study. 56 2 The value to be assigned by the carrier. 57 58 3 The value to be assigned by the carrier. 59 60 SIGNALING CONNECTION CONTROL PART 512-2 X.S0004-512-E v1.0

1 • Global Title Translation on International Mobile Subscriber Identity (IMSI) can be used for 2 communication with the HLR on the same or a different national SS7 network. It may also be 3 used for communication to any network element that is identified by an E.212 formatted address 4 on the same or a different national SS7 network. The following encoding may be used: 5 6 7 Table 1 ITU-T SS7 - E.212 Global Title 8 Field Sub-field Value 9 10 Address Indicator Point Code Indicator (PCI) 0 or 1 11 12 13 SSN Indicator (SSNI) 1 14 15 Global Title Indicator 4 (0100 ) 16 2 (GTI) 17 18 Routing Indicator (RI) 0 19 20 21 Reserved for national use 0 (international use) or 1 (national use) 22 Note: The national/international 23 indicator is intended to indicate the 24 "format" of the encoding and not the 25 national or international nature of the 26 type of address. A national/international 27 indicator = 0 means that both the 28 address indicator and the address are 29 encoded according to international 30 specifications. A national/international 31 indicator = 1 means that both the 32 address indicator and the address are 33 encoded according to national specifica- 34 tions. 35 Include applicable value if known or 36 zero. 37 38 Global Title Translation Type 0 39 40 Encoding Scheme 1=odd number of digits, 2=even 41 42

43 Numbering Plan 6 (01102) 44 45 46 Nature of address 4 (00001002) 47 indicator 48 Address Information E.212 IMSI or other E.212 formatted 49 address 50 51 52 53 54 55 56 57 58 59 60 512-3 SIGNALING CONNECTION CONTROL PART X.S0004-512-E v1.0

• Global Title Translation on Mobile Identification Number or International Mobile Station 1 Identity can be used for communication with a Message Center based on mutual agreements. 2 3 • Global Title Translation on Mobile Directory Number can be used for routing messages to an 4 HLR connected to the same or different national signaling networks. The following encoding 5 may be used: 6 7 8 Table 2 ITU-T SS7 - E.164 Global Title 9 Field Sub-field Value 10 11 Address Indicator Point Code Indicator (PCI) 0 or 1 12 13 14 SSN Indicator (SSNI) 1 15 16 17 Global Title Indicator 4 (01002) (GTI) 18 19 Routing Indicator (RI) 0 20 21 22 Subsystem Number Reserved for national use 0 (international use) or 1 (national use) 23 Note: The national/international 24 indicator is intended to indicate the 25 "format" of the encoding and not the 26 national or international nature of the 27 type of address. A national/international 28 indicator = 0 means that both the 29 address indicator and the address are 30 encoded according to international 31 specifications. A national/international 32 indicator = 1 means that both the 33 address indicator and the address are 34 encoded according to national specifica- 35 tions. 36 Subsystem Number Include applicable value if known or 37 zero. 38 39 Global Title Translation Type 0 40 41 Encoding Scheme 1=odd number of digits, 2=even 42 43 44 Numbering Plan 1 (00012) 45 46 47 Nature of address 4 (0000100 ) 2 48 indicator 49 Address Information E.164 Mobile directory number 50 51 52 53 • When an originating network entity sends an SS7 message within a national SS7 signaling 54 network with a global title in the SCCP called party address field, the SCCP calling party 55 address field should include the point code and subsystem number of the originating network 56 entity. 57 58 59 60 SIGNALING CONNECTION CONTROL PART 512-4 X.S0004-512-E v1.0

1 • When an originating network entity sends an SS7 message across a national SS7 signaling 2 network boundary, the SCCP calling party address field should include an E.212 global title 3 address identifying the originating network entity to allow response messages (RETURN 4 RESULT, RETURN ERROR, or REJECT) to be routed back to the originating network entity. 5 6 • Replies to messages shall use the received Calling Party Address as the Called Party Address. 7 (An exception occurs, if the PC_SSN parameter is received in an AuthenticationRequest 8 INVOKE or in a RegistrationNotification INVOKE. In this case,the address used for the 9 response may be derived from the received PC_SSN parameter provided the INVOKE was 10 11 received from a network entity within the same national SS7 signaling network.) 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 512-5 SIGNALING CONNECTION CONTROL PART X.S0004-512-E v1.0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 SIGNALING CONNECTION CONTROL PART 512-6