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In short term GPRS Attach Procedure.When an MS needs to signal its presence to the network in order to access to GPRS services, it performs an IMSI attach procedure for GPRS services. During this procedure a MM context is created between the MS and the SGSN.

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Posted by HamidAliKhan

www.3gpp.org/FTP/tsg_geran/WG4_Terminal_Testing-Radio_Aspects/TSGG4_04/Documents/G4-010328.doc

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Posted by crouse

www.3gpp.org/FTP/tsg_geran/WG4_Terminal_Testing-Radio_Aspects/TSGG4_04/Documents/G4-010328.doc

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Posted by crouse

i have found the below link for your answer. plz have a close look at it

etutorials.org/Mobile+devices/gprs+mobile+internet/Chapter+7+Signaling+Plane/GMM/

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Posted by jahangir1983

GPRS Attach Procedure

When an MS needs to signal its presence to the network in order to access to GPRS services, it performs an IMSI attach procedure for GPRS services. During this procedure a MM context is created between the MS and the SGSN.

There are two types of GPRS attach procedures:

1.Normal GPRS attach. This procedure is used by the MS to be IMSI attached for GPRS services only.
2.Combined attach procedure. This procedure is used by a class A or class B MS to be IMSI attached for GPRS and non-GPRS services in a cell that supports GPRS in network operation mode.

For details visit:
http://etutorials.org/Mobile+devices/gprs+mobile+internet/Chapter+7+Signaling+Plane/GMM/

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Posted by sagitraz