Nextel comm IR1200 - Manual (Page 60)

iR1200 Modem
52 nextel.com
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To safely exit out of the update firmware mode,
please select “N”. There will be about a 1-minute
delay before the system returns you to the diagnostic
menu. This is because the modem is attempting to
register with the iDEN network.
5 Once the modem has successfully registered with the
network, the HyperTerminal will present you with the
Diagnostic Menu.