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TitleGlobal Title Translation
TagsTechnology Mobile Telecommunications Data Transmission Telephony Oral Communication
File Size1.3 MB
Total Pages70
Document Text Contents
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Global Title Translation Siemens




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© 2006 Siemens AG

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Contents
1 Routing without global title translation 3
2 Routing with global title translation 7
2.1 Why global title translation? 8
2.2 Examples of global title translation 10
3 Global title translation 23
3.1 SCCP calling and called party addresses 24
3.2 Where is global title translation done? 28
3.3 Message flows 30
3.4 Administration of global title translation 34
4 Application examples 51
4.1 Network-internal location update 52
4.2 Mobile terminating call 56
4.3 International location update 60



Global Title Translation

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Relay Node Set Retranslation
End Point Entity

Set
without SSN

Remote SCCP
Linkage

SCCP
Linkage

SCCP
cdPA

OPC DPC NI

Incoming MSU

Global Title
Conversion Rule

Global Title Rule

Global Title
Translator

SCCP
cdPA

OPC DPC NI

Outgoing MSU

Relay Node Set Retranslation
End Point Entity

Set
without SSN

Remote SCCP
Linkage



Fig. 15 Global title translation

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3.4.1 Administration of the calling party address
For each local SCCP subsystem which may use message routing via GT, a calling
party address (cgPA) has to be defined, containing the global title of the NE (E.164)
and the subsystem number. It has the same data fields as the SCCP called party
address.
This cgPA is included in outgoing SCCP messages to other signaling networks and
contains enough information to identify the originating signaling point and/or the
SCCP service access point unambiguously.
A cgPA may contain a global title, e.g. for international signaling. A global title is
usually not required in an SCCP calling party address for network internal signaling,
since in that case all necessary information for routing an acknowledgement can be
obtained from the routing label. The 'CLGPA type indicator' defines the routing
preference, i.e. whether a GT shall be contained in the cgPA field of an outgoing
MSU or not.

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OPC NI+DPCSCCP cdPA

incoming MSU

GT Translator
GT Translator

CRSPGTTRL:

SPGTTRL Name=
TTID=
NP=
NA=

GT Rule
GT Rule

CRSPGTRUL:

SPGTRUL Name=
SPGTTRL Name=
GT Adr Info=
SPENS Name=
SPENSSSN Name=
SPRNS Name=
SPGTCRUL Name=
SPGTT Rule Ref Name=
Resume at Digit=
Include SPC=
Traffic Type=

End Point with SSN
End Point without SSN

Relay Point

CRSPRNS:

SPRNS Name=
Prim1 Name=
Prim2 Name=
Back1 Name=
Back2 Name=
SSID=

Local Access Point
Remote Access PointRemote Access Point

CRSPAPREM:

SPAPREM Name=
SPLNKREM Name=
SSID=

Global Title Conversion Rule
Global Title Conversion Rule

Global Title Conversion Rule

CRSPGTCRUL:

SPGTCRUL Name=
Addr Info Cov Rule=
New TTID=
New NP=
New NA=

Local SCCP Linkage
Remote SCCP Linkage

CRSPLNKREM:

SPLNKREM Name=
Net Name=
DPC=
Ass. Con. Section=

OPCSCCP cdPA

outgoing MSU

NI+DPC

GTDIG=
OPC=
DPC=
SSID=
NI=
RI=

cgPA:

End Point with SSN
End Point without SSN

Relay Point

CRSPRNS:

SPRNS Name=
Prim1 Name=
Prim2 Name=
Back1 Name=
Back2 Name=
SSID=



Fig. 46 GTT database in the gateway

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