Tdoc TSGS WG3#8(99)412

Source:		SMG10 & TSG-SA WG3 
To:			TSG-CN WG2
Copy:		TSG-CN, TSG-SA
Title:	Liaison statement on the application of IST to emergency calls

SMG10 and TSG-SA WG3 thank TSG-CN WG2 for pointing out in their liaison that neither the stage 1 nor stage 2 IST specifications mention the treatment of emergency calls (S3-99232/AP99-087/N2-99900). It is noted that TSG-CN WG2 are proposing that emergency calls should be excluded from IST functionality and that this should be stated in the stage 1 and stage 2 IST specifications.
SMG10 and TSG-SA WG3 would like to state that the termination of emergency calls must be a VPLMN option and that this should be stated in the appropriate specifications.