MSID (Mobile Station Identity)

MSID (Mobile Station Identity) is a unique identifier for a wireless phone used as a paging identity to complete an emergency call from a PSAP. The MSID may be an International Mobile Subscription Identity (IMSI) or a Mobile Identification Number (MIN) programmed into the phone by a service provider.

NENA-STA-010, NENA i3 Standard for Next Generation 9-1-1