Multitech MTA128NT Quick Start Manual page 13

7. The TEI (Terminal Endpoint Identifier) screen is displayed
with Please select the settings you would like for Data TEI
and Voice TEI.
The TEI is a unique number assigned to the TA at
subscription time. The TEI is used by the telephone central
office (GO) to identify the various TAs connected to the
ISDN network. The TEI number can be fixed (range 0 - 63) or
dynamic and is assigned automatically at the GO each time the
TA connects to the ISDN interface and powers up. Glick Next
when you are finished.
MTA128NT/ST Quick Start Guide
13