Editing Network switching subsystem (section)

===Other GSM core network elements connected to the MSC===
The MSC connects to the following elements:
* The [[Network switching subsystem#Home location register (HLR)|home location register]] (HLR) for obtaining data about the [[Subscriber Identity Module|SIM]] and [[MSISDN|mobile services ISDN]] number (MSISDN; i.e., the telephone number).
* The [[Base Station Subsystem|base station subsystems]] (BSS) which handles the radio communication with [[2G]] and [[2.5G]] mobile phones.
* The [[UTRAN|UMTS terrestrial radio access network]] (UTRAN) which handles the radio communication with [[3G]] mobile phones.
* The [[Network switching subsystem#Visitor location register (VLR)|visitor location register]] (VLR) provides subscriber information when the subscriber is outside its home network.
* Other MSCs for procedures such as [[handoff|hand over]].