GSM Mobile to Mobile call in the same MSC

If subscriber A and B belong to PLMN-A and PLMN-B but currently in MSC-X. Both have made and received calls a moment ago. If A calls B now, will there be any network messaging involved ( like SRI, routing to call to GMSC and back to the MSC-X) or the call can be delivered without any n/w messaging?

Reply to
Loading thread data ... Forums website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.