Dear Experts, We have the following call case:
Call is originated from PSTN. We have GMSC node ( transit switch) which receives an INVITE containing encapsulated ISUP IAM message in SIP-I interface. The GMSC further sends INVITE in SIP interface to the end node (MSS) in which the FROM header does not contain the calling party number. The FROM header is displayed as : From: <sip:unavailable@unknown.invalid>;tag=2609184897 The incoming INVITE towards GMSC contains FROM header containing calling party number and is displayed as: From: <sip:4959516681@10.242.30.10;user=phone>;tag=p9343wwl-CC-23. The incoming ISUP IAM message has the following parameters present: CgPN ( calling party number):4959516681 NOA (nature od Address)=National Presentation restricted ind= *Presentation allowed* CallingPN incomplete ind = Complete Screening ind = Network provided Numbering plan ind = ISDN (Telephony) Pls help us investigate the reason why FROM header for INVITE sent from GMSC does not contain calling party number and is displayed as unavailable@unknown.invalid. Thanks in Advance! Regards, Souvik Pal On Tue, Aug 5, 2014 at 2:50 PM, souvik pal <souvik16...@gmail.com> wrote: > Dear Team, > > We have the following call case: > > Call is originated from PSTN. > > We have GMSC node ( transit switch) which receives an INVITE containing > encapsulated ISUP IAM message in SIP-I interface. > > The GMSC further sends INVITE in SIP interface to the end node (MSS) in > which the FROM header does not contain the calling party number. > > The FROM header is displayed as : > From: <sip:unavailable@unknown.invalid>;tag=2609184897 > > The incoming INVITE towards GMSC contains FROM header containing calling > party number and is displayed as: > > From: <sip:4959516681@10.242.30.10;user=phone>;tag=p9343wwl-CC-23. > > The incoming ISUP IAM message has the following parameters present: > > CgPN ( calling party number):4959516681 > > NOA (nature od Address)=National > > Presentation restricted ind= *Presentation allowed* > > CallingPN incomplete ind = Complete > > Screening ind = Network provided > > Numbering plan ind = ISDN (Telephony) > > Pls help us investigate the reason why FROM header for INVITE sent from > GMSC does not contain calling party number and is displayed as > unavailable@unknown.invalid. > > > Thanks in Advance! > > > Regards, > Souvik Pal > > > _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
