
Configuring with AT commands 7-7
Step Four: Testing the Configuration
1 After you reset your I-modem (in Step Three) watch the I-modem’s
LED status indicators. AA, DTR, MR, RTS, and CTS should be lit
green, and NS should blink yellow rapidly.
Watch the NS LED closely. It should follow this pattern:
Step The NS LED Means this
1
Fast blink (8 per
second), Yellow
Searching for U interface
(I-modem Model 1 and 2 only)
2
Slow blink (1 per
second), Yellow
Searching for S/T interface
3
Slow blink (1 per
second), Green
Physical connection active
4
Green solid Ready to make or receive calls
These are error conditions and suggested solutions:
If NS LED does this This may be the problem
Red blink (1 per second) Incorrect SPID. Send ATI12 <Enter>
and re-check your SPID and DN
settings.
Red solid No physical connection. Make sure
that the U-interface cable is plugged
into the I-modem.
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